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Rezultatele pentru mathematical modelingRezultate gasite: 247
Floodplain revegetation and river basin restoration
Environmental Engineering and Management Journal › Vol. 6 › Nr. 4 AbstractDuring the modern history the ability of plant roots to consolidate and strengthen the soil was exploited twice in France: once in1867 by Joseph Monier who created the reinforced concrete, and then in 1962 by Henry Vidal who created structured soils.The paper presents the some results obtained on the ecological protection of floodplain in major riverbeds. The aerodynamic modeling represents an efficient, economic and easy way to work with. The main condition of successful experiments is ... Autori: Ana Virsta ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25136
Pilot plant treatment of water for drinking purpose by PAC
Environmental Engineering and Management Journal › Vol. 6 › Nr. 5 Experiments in a Pilot Plant (PP) are extremely important and relevant for the substantiation of research. This is the way to set up the most suitable coagulation-flocculation reagents, optimum operating conditions (injection point, reaction times, etc.),compatibility with the processes at the actual Water Works and real possibilities for further improvement.The present work aimed at verifying the previously obtained results in laboratory under PP working conditions for optimizing the coagulatio... Autori: Adina Pacala, Alina Anghelina, Dalila Marşavina, Ilie Vlaicu, Katalin Bodor, Mihaela Anghel ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25156
Equilibrium isotherms studies for sorption of lead ions from aqueous solutions using Romanian peat sorbent
Environmental Engineering and Management Journal › Vol. 6 › Nr. 5 In this work, the ability of Romanian peat for sorption of Pb (II) ions from aqueous solution has been determined using the batch experimental techniques. The sorption equilibrium has been studied at different pH values. The equilibrium adsorption level was determined to be dependent of the pH of solution and initial Pb(II) concentration.The equilibrium adsorption capacity of Romanian peat sorbent for lead has been described by seven types of mathematical model isotherms, namely: Freundlich, Lan... Autori: Brindusa Robu, Corneliu Cojocaru, Laura Bulgariu, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25160
Environmental Engineering and Management Journal, Vol. 7 Nr. 3
Environmental Engineering and Management Journal › Vol. 7 › Nr. 3 Include urmatoarele articole:â€? Cost sensitivity analysis by Monte Carlo simulationâ€? Mathematical modeling of gas drying by adsorptionâ€? Methyl isobutyl ketone combustion over Pt/Al2O3 catalystâ€? Distribution of oxygen transfer rate in stirred bioreactors with simulated brothsâ€? Unsteady heat transfer inside an elliptic cylinderâ€? Triphasic external-loop airlift reactors. Hydrodynamic and dispersion studiesâ€? Sustainable combined utilization of renewable forest resources and coal in Roma... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25209
Development of a coagulation/flocculation predictive model for turbidity removal from tehran water treatment plants
Environmental Engineering and Management Journal › Vol. 7 › Nr. 1 AbstractAluminum and ferric salts are widely used as coagulants in water and wastewater treatment. They are effective in removing a broad range of impurities from water, including colloidal particles and dissolved organic substances. As well as traditional additives, such as aluminum sulphate ("alum") and ferric chloride, other products containing prehydrolized metal ions such as polyaluminum chlorides are now commonly used. The aim of this study was to develop a model for coagulation/flocculati... Autori: Avid Banihashemi, Manouchehr Nikazar, , Reza Maknoon ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25230
Analytical approach to estimate the air flow rate in the boundary layer of a heated furnace wall
Environmental Engineering and Management Journal › Vol. 7 › Nr. 3 AbstractThe critical analysis of the transfer processes intensification techniques is carried out by identification of the methods that can be applied, regardless of the process nature. The main priority is the development of a consistent methodology that will represent the basis of specific practical methods development by establishing a theoretical frame for studying the heat transfer processes. The main purpose is to reduce the stationary time of the charge in the installation, accomplishing ... Autori: Adrian Dima, Alina Adriana Minea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25253
Quantification of impact and risk induced in surface water by heavy metals: Case study - Bahlui River Iasi
Environmental Engineering and Management Journal › Vol. 7 › Nr. 3 AbstractThe purpose of this paper was to quantify the environmental impact and risk applying a new integrated method designed as a soft SAB. The evaluation of impact and risk induced in environment was performed for surface waters (Bahlui River, IaÂ?i), considering the presence of some minerals and heavy metals in surface water in high concentrations. The new method for integrated environmental impact and risk assessment that considers the pollutants concentration levels in surface water w... Autori: Brindusa Robu, Dumitru Bulgariu, Laura Bulgariu, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25262
Mathematical modeling of gas drying by adsorption
Environmental Engineering and Management Journal › Vol. 7 › Nr. 3 AbstractTheoretical and experimental studies of gas drying processes by adsorption in fixed bed of grains are presented in this paper. Based on an extensive literature study, some of the most representative mathematical models describing gas adsorption in fixed bed and consequently gas drying processes by adsorption in fixed bed are also presented. Using a mathematical model from those mentioned describing adsorption under isotherm regime, the temperature and gas flow velocity effects over the d... Autori: Marius Sebastian Secula, Stelian Petrescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25272
Performance of traffic noise models for metropolitan cities
Environmental Engineering and Management Journal › Vol. 7 › Nr. 4 AbstractIn India, transportation sector is growing fast and the number of vehicles on Indian roads is increasing at a rate more than 7 percent a year. During the period of 50 years from 1951 to 2001, the number of vehicles has increased from 0.3 million to 43 million i.e. an increase of almost 143 times. This has led to overcrowded roads and noise pollution. The transportation sector is one of the major contributors to noise in urban areas, accounting to as much as 55 percent of total noise on t... Autori: Arvind Kumar Shukla, Jyoti Bhushan Srivastava, Manoranjan Parida, Sukhvir Singh Jain ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25279
Methods for analisys and evaluation of occupational accidents and diseases risks
Environmental Engineering and Management Journal › Vol. 7 › Nr. 4 AbstractThe evaluation of the occupational risk represents an operation whose purpose is to assess the risk for accidents and occupational diseases which can occur during the development of some hazards produced by human activities inside the working system, with the view to giving a qualitative and a quantitative size of this element.In the study, mathematical patterns are developed to be used for laying foundations of modern methods for the analysis and assessment of occupational risks. The sc... Autori: Angelica Nicoleta Draghici, Constantin Baciu, Gabriel Dragoş Vasilescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25280
Studies on heat treatment of an AlCu4Mg1 alloy
Environmental Engineering and Management Journal › Vol. 7 › Nr. 4 AbstractThis paper presents experimental and theoretical studies regarding the behavior after heat treatment of an AlCu4Mg1 aluminum alloy with positive effect on corrosion resistance. On the basis of these experiments and the regression data obtained, an analysis regarding the influence of heating parameters on quenching and aging in order to obtain a certain stress was made. Two cases were considered: stress and quenching temperature are fixed and aging temperature was determined; stress and a... Autori: Adrian Dima, Alina Adriana Minea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25281
Environmental Engineering and Management Journal, Vol. 9 Nr. 3
Environmental Engineering and Management Journal › Vol. 9 › Nr. 3 ? Denitrifying activity of activated sludge in suspension and in biofilm? Denitrifying potential of an activated sludge derived consortium? Biosorption of hexavalent chromium based on modified Y zeolites obtained by alkali-treatment? Identifying anaerobic digestion models using simultaneous batch experiments? Olive mill wastewater as a renewable resource? Influence of innoculum acclimation in the biodegradation rate and estimated biodegradbility of cow manure, food waste and oil? Studies on the ... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25378
Removal of nickel from aqueous solution by Nordmann FIR (ABIES Nordmanniana (STEV.) SPACH SUBSP. Nordmanniana) cones
Environmental Engineering and Management Journal › Vol. 7 › Nr. 4 AbstractBiosorption an alternative process is the uptake of heavy metals from aqueous solutions by biological materials. The biosorption of nickel ions from aqueous solution was investigated by Nordmann fir (Abies nordmanniana (Stev.) Spach. subsp. nordmanniana) in a batch adsorption system as a function of pH, initial metal concentration, biomass dosage, contact time. The data showed that the maximum pH for efficient sorption of Ni(II) was 6.5. At the optimal conditions, Ni(II) ion biosorption ... Autori: Handan Ucun, Ozkan Aksakal, Yusuf Kaya ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25295
Combustion of pitcoal-wood biomass brichettes in a boiler test facility
Environmental Engineering and Management Journal › Vol. 7 › Nr. 5 AbstractThe use of composite fuels using pitcoal and sawdust represents a high perspective. The paper deals with the experimental results focusing on the combustion efficiency of composite fuel briquettes and on the polluting emissions level. A special care is given to the determination of boiler efficiency and to the establishment of exploiting economic conditions, like the supply, cleaning etc. The research of the combustion of pitcoal-wood biomass briquettes is conducted on a 55 kW boiler.A n... Autori: Gabriel Negreanu, Gheorghe Lăzăroiu, Ion Oprea, Ionel Pisa, Lucian Mihăescu, Radu Indries, Tudor Prisecaru ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25301
Equations for alluvial soil storage coefficients
Environmental Engineering and Management Journal › Vol. 7 › Nr. 6 AbstractThe paper defines the average and local soil storage coefficients, for a soil with relatively shallow water table. By means of an adequate law for the suction distribution on soils level and certain parametrical models for the moisture retention curve of soil, the analytical equations for these storage coefficients were determined. Theoretical results are to be applied for a case study and on the basis of a pertinent analysis, and some recommendations were made for the practical use of f... Autori: Daniel Toma, Esmeralda Chiorescu, Stefan Popescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25319
Quantification of environmental impact and risk induced by industrial activities on ground water quality: Case study Cordun - Roman area, Romania
Environmental Engineering and Management Journal › Vol. 7 › Nr. 6 AbstractThe question of whether environmental assessment has achieved its goal of helping to reach better decisions has continually engaged the attention of academics, policy makers and environmental impact assessment practitioners. Answering this question requires several different groups working together and/or in sequence, and examining the effectiveness of environmental impact and risk assessment. EIA has tended to focus on the identification of impacts associated with planned activities or ... Autori: Brindusa Robu, Elena Doinita Carlig, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25321
The Algae Blooms phenomenon - A mathematical model
Environmental Engineering and Management Journal › Vol. 8 › Nr. 1 Pollution with sources from towns and industrial centres affect considerable the ecosystem waters. An accumulation of nutrients favourable to the growth of certain tiny marine organisms called phytoplankton stimulates their rapid reproduction in the water.These plankton blooms appear as patches on the surface of the water. The consequence of this process is the diminishing of the amount of oxygen from water (in the process of decompose the algae), the decease of aquatic animal and the multiply o... Autori: Laura Stefanescu, Laura Ungureanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25351
Hydrodynamic modelling of pollution with LNAPL generated by waste dump from metal working industry
Environmental Engineering and Management Journal › Vol. 8 › Nr. 1 AbstractIn the present article, some models conceptually and mathematically applicable to the LNAPL transitory transport process through ground water were discussed. Subsequently, by using a personal computer program of pre-processing basis data combined with MOVER 2.0, the levigation process of oily dross/scale stored in the waste dump, which produces steel rolled tubes, was numerically simulated, in adequate scenarios. The results of the simulations will be useful at the evaluation of the impa... Autori: Elena Doinita Carlig, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25361
Environmental Engineering and Management Journal, Vol. 8 Nr. 1
Environmental Engineering and Management Journal › Vol. 8 › Nr. 1 Include urmatoarele articole:â€? CsHSO4/mesoporous silica composites - new electrolytes for solid acid fuel cellsâ€? Trend in exhaust emissions from in-use gasoline vehiclesâ€? Analysis of distribution of oxygen transfer rate in stirred bioreactors for bacterial brothsâ€? Electrochemical characteristics of Ti6Al7Nb alloy in Ringer's solutionâ€? Pulsed high voltage discharge technology as a new method for killing Hepatitis C virus (HCV) cellsâ€? Hydrodynamic modelling of pollution with LNAPL gene... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25367
Environmental Engineering and Management Journal, Vol. 8 Nr. 3
Environmental Engineering and Management Journal › Vol. 8 › Nr. 3 â€? Bioremediation of contaminated air using a bioscrubberâ€? Quality risk evaluation of the groundwater resources on the moldavian areaâ€? Electrochemical characterization of some dental materials in accelerated environmental testingâ€? Preliminary study of simple and Fenton oxidation with hydrogen peroxide applied on final effluents from a zootechnical farmâ€? The environmental impact assessment caused by the dykes failureâ€? Revaluation of beer industry byproducts – medical implicationsâ€? ... Autori: http://www.ecozone.ro/reviste.php?RID=25372
Environmental Engineering and Management Journal, Vol. 8 Nr. 6
Environmental Engineering and Management Journal › Vol. 8 › Nr. 6 â€? Physiological changes in seedling germination and growth plant under chemical stress conditionsâ€? Studies on sorption and transport processes of cadmium in soilsâ€? Assessment of the anthropogenic impact on water systems by fluorescence spectroscopyâ€? Research on the effects of soil improvement by fertilization on the quality of winter wheatâ€? Halotherapy: From ethnoscience to scientific explanationsâ€? Study regarding the sorption of erythrosine from aqueous solution onto soilâ€? Hydroxy... Autori: ISSN: 1582 - 9596 http://www.ecozone.ro/reviste.php?RID=25375
Environmental monitoring of co emissions: Statistical character of acquired data
Environmental Engineering and Management Journal › Vol. 8 › Nr. 3 Abstract
A set of experimental data resulted from environmental monitoring and its informational content has to be revealed and checked for its statistical character. As a result in this paper the aim was to verify if the environmental monitoring data obtained for a specific air pollutant monitored during three years presents statistical properties. Based on the results obtained by applying statistical requirements such as fixed location, fixed variation, randomness and fixed distribution, a ... Autori: Irina Meghea, Mihaela Mihai, Ioana Lacatusu, Tiberiu Apostol ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25410
Numerical simulation of pollution with anion SO4 2- for the aquifer inside a metallurgical waste hall
Environmental Engineering and Management Journal › Vol. 8 › Nr. 3 Abstract
The current paper describes the concept and the mathematical models axed upon flow transport and transport of pollutants in the aquifer inside a metallurgical waste hall. Then, using a complex of basic data related to a representative case study - several information being achieved by systematic measurements, for long period, throughout ten drillings - and the pack of FEFLOW 5.1 programmes, the dispersion of an uppermost pollutant (the anion SO4) has been numerically simulated, for t... Autori: Elena Doinita Carlig, Esmeralda Chiorescu, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25416
Exploratory investigation of bioprocesses sustainability improvement by multicriteriamultilevel optimization
Environmental Engineering and Management Journal › Vol. 8 › Nr. 3 Abstract
Up to the present days, the bioprocesses were designed and operated with the aim at achieving some economic, environmental, and social criteria. Sustainability based optimization has to be the next step towards the improvement of the economical, environmental and social parameters of bioprocesses. In this work, sustainability will be treated as an optimization task where the objective function(s) is/are either a performance index or a set of performance indices, subject to economic, ... Autori: Alexandru Woinaroschy, Dana Irina Ofiteru, Vasile Lavric ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25418
Evolution of emissions of heavy metals in Vaslui County
Environmental Engineering and Management Journal › Vol. 8 › Nr. 3 Abstract
Elaboration of the inventory of the pollutants emissions in atmosphere constitutes the basis for elaboration of the strategies and reglementations, assessment of the trends in evolutions of emissions, modeling of the pollutants dispersions, analysis of new sources, establishment of emission taxes, compliance with legislation, as well as review of existing reglementation and standards regarding the air quality.
The current paper describes both the evolution of the emissions of the he... Autori: Mihaela Budianu, Mihai Nicu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25422
Experimental technique for saving energy in oval furnaces
Environmental Engineering and Management Journal › Vol. 8 › Nr. 3 Abstract
Changing the working space by introducing some radiant panels has the purpose of intensifying the heat transfer by convection and radiation. By centralizing the experimental results, has been obtained an energetic saving of 28.67 – 32.74 % by using radiant panels; the heating speed of the charge raises with almost 50 % and the heating time of the charge decreases. In conclusion, changing the working space by introducing some radiant panels inside the furnace leads to important ener... Autori: Alina Adriana Minea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25426
The local storage coefficient of a layered soil
Environmental Engineering and Management Journal › Vol. 8 › Nr. 3 Abstract
Analytical equations for the variation of soil moisture content and for the local storage coefficient for a layered soil with a relatively shallow water table were developed in this study, based on a linear distribution law of the moisture retention on soil's profile, and the van Genuchten-Mualem parametrical model for the moisture-suction curve.
By considering this mathematical model, an original computer code was written in MATLAB to determine and then to graphically represent the... Autori: Dan Prepelita, Stefan Popescu, Esmeralda Chiorescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25429
Photocatalytic oxidation process of sulfamethazine. Modeling based on neural networks
Environmental Engineering and Management Journal › Vol. 8 › Nr. 3 Abstract
The photocatalytic degradation of sulfamethazine, a sulfonamide drug, has been investigated experimentally, in aqueous heterogeneous solutions containing n-type oxide semiconductors as photocatalysts, and by simulation, using neural network modeling. Through direct neural network modeling, the evolution of the photocatalytic oxidation process is evaluated as function of illumination time and type of catalyst. Inverse neural network modeling is a particular optimization that gives inf... Autori: Ciprian George Piuleac, Ioannis Poulios, Silvia Curteanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25430
Case studies regarding the remediation of polluted soils from inactive industrial sites
Environmental Engineering and Management Journal › Vol. 8 › Nr. 4 Abstract
The methods generally used for developing these studies are the assessment and investigation. Assessment – all methods used for measuring, reckoning, modeling, forecasting or estimating the presence of a pollutant in the environment. Investigation - the process of identifying the presence of pollutants in the environment, the spatial dispersion of these pollutants, the level of their concentration, as well as the analysis of the environment’s structure. The steps that were follow... Autori: , Gheorghe - Viorel Cosara, Calin Baciu, Ileana - Codruta Stezar, Augusta - Diana Crisan, Camelia Costan, Cristina Modoi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25451
The product's anticipated success ratio on the turbulent markets: A genuine tool for the agile enterprises
Environmental Engineering and Management Journal › Vol. 8 › Nr. 5 Abstract
To become "flexible" is the equivalent of becoming successfully for almost any firm - the activities based on old and traditional product "recipes" are, obviously, excluded. But, in the framework of a global economy crisis, the statistics seems to prove that flexibility is no longer enough in order to avoid troubles. At the same time, another statistics prove that almost 80% of the products are failing at their first release on market. The paper presents a genuine marketing aggregate... Autori: Gabriel-Petru Luca, Ion Verzea, Irina Cozminca ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25511
The advertising efficiency ratio: A marketing aggregate indicator modeling for a noisy and turbulent market
Environmental Engineering and Management Journal › Vol. 8 › Nr. 5 Abstract
This paperwork is trying to achieve some of theoretical and practical objectives concerning the "agility" concept: to make the differences operational, and to ensure the present surviving and the future development of economical activities in a, more and more, turbulent business environment. Also, the paperwork comes to display a genuine aggregate indicator "Advertising Efficiency Ratio", special developed to help the market players to face - throughout their advertising process - th... Autori: Gabriel-Petru Luca, Ion Verzea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25513
Modeling the extraction process of oil from seeds of white mustard (Sinapis alba)
Environmental Engineering and Management Journal › Vol. 8 › Nr. 6 Abstract
White mustard (Sinapis white) is an annual plant of the Cruciferae family originating from the Mediterranean region and is cultivated in Europe and Asia, mainly for its seeds, but also for animal feed or crop rotation. White mustard seed is also an important source of vegetable oil that can be used as fuel. The chemical composition of mustard seed (Sinapis alba) includes glucosinolate (sinalbozida, sinapina free), essential oils, fatty oils (glycerides of oleic acid, linoleic, linole... Autori: Camelia Ciubota-Rosie, Rodica Diaconescu, Irina Volf, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25561
Modeling and simulation of quality indicators of surface water
Environmental Engineering and Management Journal › Vol. 8 › Nr. 6 Abstract
The efficient understanding and application of mathematical models in the study of environmental phenomena keep up with the latest results in the mathematical domain which could provide solutions for controlling, analyzing, predicting and study of risk phenomena. This paper presents a browsing through some mathematical categories of interpreting statistical data, examples and their analysis in connection with the degree of polluting the water down the Danube River with the help of qu... Autori: Valerian Antohe, Constantin Stanciu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25562
Valorization of plaster molds waste from fine ceramic industry
Environmental Engineering and Management Journal › Vol. 9 › Nr. 1 Abstract
The Environment Action Program foresees the development of a Thematic Strategy concerning the sustainable use of natural resources and waste management (Report EUR 21002 EN, 2004). In this context, the activities regarding the research and industrial development related to waste valorization through recycling and reusing have been grown. The wastes resulted from the fine ceramic technological process (scraps, used molds etc.) may be valorized. The used molds can be valorized in other... Autori: Ion Balasanian, Liliana Lazar ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25582
Equilibrium and kinetic studies of acid dye sorption onto soils from Iasi area
Environmental Engineering and Management Journal › Vol. 9 › Nr. 1 Abstract
The aim of this study was to investigate the Congo Red (CR) sorption behavior onto six soils from Ia?…?¸i area, with different characteristics. The rate of sorption of Congo red dye molecules from aqueous solution by soil was studied in batch conditions. The rate of sorption was very rapid in the first 5-10 minutes and reached a maximum in 20 minutes. Kinetic modeling analysis of the pseudo-first-order, pseudo-second-order, intraparticle diffusion and Elovich equations reveals that t... Autori: Camelia Smaranda, Dumitru Bulgariu, Maria Gavrilescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25594
Optimization by NN ? GA technique of the metal complexing process. potential application in wastewater treatment
Environmental Engineering and Management Journal › Vol. 9 › Nr. 2 Abstract
Some samples consisting in silica functionalized in different degrees with dihydroxy-azomethine groups have been tested as sorbents for copper (II) ions from aqueous solutions in different conditions. An indirect monitoring procedure for the complexing process was approached: UV-VIS absorption intensity ? time variation for the metal-containing solution in which complexing silica was soaked. In order to find the conditions in which the maximum efficiency in the metal absorption can b... Autori: Ciprian-George Piuleac, Maria Cazacu, Silvia Curteanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25608
Environmental decision support systems based on models and model-based reasoning
Environmental Engineering and Management Journal › Vol. 9 › Nr. 2 Abstract
Decision trees and rule-based systems including variants based on propositional and fuzzy logic have been the method of choice for knowledge representation in many applications of environmental decision support systems. Reasons are the ease of use, the capability of representing uncertainty, and the fast computation of results at runtime when using decision trees, rule-based systems, or other similar means for knowledge representation. Unfortunately there are drawbacks related with t... Autori: Franz Wotawa, Ignasi Rodriguez-Roda, Joaquim Comas ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25614
Kernel methods and neural networks for water resources management
Environmental Engineering and Management Journal › Vol. 9 › Nr. 2 Abstract
This paper offers a hybrid approach, for the effective estimation of the maximum water supply and the special water flow in the watersheds of Thasos Island. This modeling effort was carried out by employing both artificial neural networks (ANNs) and kernel algorithms. Moreover support vector machines (SVMs) were used for the optimization of the ANNs. Support vector machines were applied to determine the loss of the developed ANN and to enhance its ability to generalize. As a matter o... Autori: Lazaros S. Iliadis, Stavros Tachos, Stefanos I. Spartalis ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25615
Utilization of two artificial neural network methods in surface water quality modeling
Environmental Engineering and Management Journal › Vol. 9 › Nr. 3 Abstract
Artificial neural networks (ANNs) are capable of learning the relationships between the dependent and predictor surface water quality variables and have a high ability to predict from the new data set. In this study, two different ANN methods, the feedforward network (FFN) and the cascadeforward network (CFN) were applied to predict two surface water quality variables such as chlorophyll-a (Chl-a) and fecal coliform (FC) using twelve other variables as an input to the models. Both me... Autori: Hasan Merdun, Ozer Cinar ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25623
Assessment of Jajrood river watershed microbial pollution: Sources and fates
Environmental Engineering and Management Journal › Vol. 9 › Nr. 3 Abstract
The Jajrood River watershed is one of the main drinking water resources of Tehran, the capital city of Iran. In addition it provides many recreational usages. However, a variety of microbial pollutions is commonly perceived in the Jajrood River, among them a high concentration of coliform group bacteria that has caused strong concerns. In this article, different aspects of microbial pollution as well as the main microbial pollution sources in the region are discussed. Coliform group ... Autori: Mahdi Jamshidi, Mahdi Maghrebi, Masoud Tajrishy ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25627
Modeling and simulation of an ultrafiltration process for the removal of suspended solids and colloids from wastewater
Environmental Engineering and Management Journal › Vol. 9 › Nr. 3 Abstract
Mathematical modeling of the ultrafiltration (UF) process is motivated by the complexity of retention phenomena that occur during the UF in conjunction with the complexity of wastewater matrices submitted to ultrafiltration, as well as by the need to predict the process behavior in extreme conditions, such as high pollution loads for UF-membrane cleaning cycles optimization or for automated control of the process. Thus, series of laboratory-scale ultrafiltration experiments were perf... Autori: , George Barjoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25630
Equilibrium and kinetic modeling of Zn (II) sorption from aqueous solutions by sphagnum moss peat
Environmental Engineering and Management Journal › Vol. 9 › Nr. 3 Abstract
Equilibrium and kinetics of sorption of Zn (II) ions from aqueous solutions of pH 5 on indigene (Romanian) peat moss were investigated in batch system. The experimental equilibrium sorption data at three temperatures were analysed by Freundlich, Langmuir, Tempkin and Dubinin-Radushkevich sorption isotherm models. Results indicate the following order in to fit the isotherm equations: Langmuir > Tempkin > Dubinin-Radushkevich > Freundlich. The equilibrium sorption capacity determine... Autori: Angelica Kicsi, Doina Bilba, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25632
Identifying anaerobic digestion models using simultaneous batch experiments
Environmental Engineering and Management Journal › Vol. 9 › Nr. 3 Abstract
Mathematical models have become a valuable tool to study the anaerobic digestion process, to guide plant design and optimize operation strategies. Models require accurate and significant parameter values for being useful. Although the identification problem is an issue of concern, often is neglected. The described method for model calibration consists on the performance of simultaneous batch experiments (SBE), which requires simple and usually available equipment, and is based on the... Autori: Belen Fernandez, Jordi Palatsi, Josep Illa, M. Angels Colomer, Xavier Flotats ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25636
Environmental Engineering and Management Journal, Vol. 9 Nr. 5
Environmental Engineering and Management Journal › Vol. 9 › Nr. 5 ? SUSTAINABLE CONCRETE HARDENING PROCESSES IN NORMAL CLIMATIC AND THERMAL TREATMENT CONDITIONS
? THE ENVIRONMENTAL DIMENSION ? AN INTERDISCIPLINARY RESEARCH AREA
? MENU PLANNING STRATEGY BASED ON ECOLOGICAL FOOTPRINT
? EVALUATING ENVIRONMENTAL IMPACT OF NIGERIAN COMPOSTED WASTES USING LABORATORY EXTRACTION TEST
? IN SITU RADIOFREQUENCY FIELD LEVEL ASSESSMENT IN TWO URBAN AREAS IN ROMANIA: OPEN QUESTIONS TO ELECTROMAGNETIC POLLUTION
? INNOVATIVE SOLUTION FOR WARNING ON HI... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25657
Environmental Engineering and Management Journal, Vol. 9 Nr. 8
Environmental Engineering and Management Journal › Vol. 9 › Nr. 8 ? GREEN SYNTHESIS OF SYMMETRICAL CARBONATE FT-IR STUDY
? SINTERED BASALT AS A PROMISING SUSTAINABLE MATERIAL IN MECHANICAL ENGINEERING
? DESIGN OF BUILDINGS INCLUDING ENVIRONMENTAL IMPACT
? ANALYSIS METHODS FOR PYRAZINE-2,3-DICARBOXYLIC ACID SYNTHESIZED USING ELECTROCHEMICALLY REGENERATED KMnO4
? RESEARCH ON NaCl SALINE AEROSOLS II. NEW ARTIFICIAL HALOCHAMBER CHARACTERISTICS
? DETERMINATION OF AEROSOLS POLLUTANTS ON MEMBRANES. 1. MEMBRANES PREPARATION AND CHARACTERIZATIO... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25660
Environmental Engineering and Management Journal, Vol. 10 Nr. 2
Environmental Engineering and Management Journal › Vol. 10 › Nr. 2 ? Environmental Engineering and Management Journal, Vol. 9 Nr. 4
? THE PROTECTION OF EQUIPMENTS USING VOLATILE INHIBITORS
? CONTINUOUS SURFACE TEMPERATURE MONITORING TO ESTIMATE SENSIBLE HEAT LOSS BY BUILDING FINISHES
? RECYCLE OF POLYAMIDE DYEING WASTEWATER FOLLOWING DECOLORIZATION WITH POLYMERIC SORBENTS
? PERFORMANCE EVALUATION OF AMINO ACID SALT-BASED COMPLEX ABSORBENTS FOR CO2 CAPTURE
? ADSORPTION EQUILIBRIUM STUDIES ON COPPER (II) IONS REMOVAL BY NATURAL WASTE USIN... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25666
EVALUATION OF THE IMPACT OF PLANTING STRUCTURE ON WATER RESOURCES
Environmental Engineering and Management Journal › Vol. 10 › Nr. 7 Many regions are facing formidable freshwater management challenges. In this research, the Water Evaluation and Planning System (WEAP) was used to simulate water demand and supply under planting structure adjustment scenario in Laohahe River Basin (LRB), China. The effects of planting structure adjustment on alleviating the water resources vulnerability were simulated by defining scenario for changes in crops sown area inputs to WEAP model. The results show that compared with the Reference, plan... Autori: Lu Hao, Lingling Huang, Wenbin Wang, Huiyuan Zhanghttp://www.ecozone.ro/reviste.php?RID=25699
PERFORMANCE STUDY OF SOLAR DRYER FOR AGRICULTURAL AND MARINE PRODUCTS
Environmental Engineering and Management Journal › Vol. 10 › Nr. 8 Abstract:In the current work design and mathematical description of thermal performance analysis of solar dryer for agricultural andmarine products is presented. Proposed solar dryer includes two main subunits: 1) Solar PV-Thermal dehydrator (heat transferfluid is air), which is used as heat source for dryer; 2) Drying cabin with multistage trays. The pilot unit of proposed systemdeveloped in Renewable Energy Department of Physics Faculty of University of Santiago de Compostela. Investigations o... Autori: Angeles López Agüera, Daniel Rey Rey, E. Virites Montes, Iago Rodriguez Cabo, Jasurjon S. Akhatov, Vicente Gándara ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25719
HYDRAULIC ASPECTS OF SCALING IN GEOTHERMAL ENERGY SYSTEMS
Environmental Engineering and Management Journal › Vol. 10 › Nr. 8 Abstract:The European countries have few fossil fuel reserves and the main goal of the Lisbon strategy is to promote the utilization ofrenewable energy sources. In Hungary, because of the huge amount of thermal water reserves, geothermal energy might be one ofthe energy sources which can help to raise the share of renewables in the energy market of the country. Beside the positive aspectsthe use of thermal water for energy purposes have some important physical, environmental and economical aspec... Autori: Ferenc Kalmár, Imre Csáki ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25738
DESIGN AND SIMULATION OF A PHOTOVOLTAIC STRING WITH TRACKING MECHANISM
Environmental Engineering and Management Journal › Vol. 10 › Nr. 9 Abstract:The paper presents a method to improve the efficiency of a photovoltaic (PV) string by employing a mono-axis trackingmechanism. The tracking system was optimized so that it has minimum energy consumption during tracking. The PV stringsimultaneously changes the daily position using a linear actuator which transmits the motion to all modules by a rack-pinion gearmechanism. The system is designed in virtual prototyping concept with the following software solutions: for the solid modeling -... Autori: Cătălin Alexandru, Nicoleta-Irina Tatu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25766
CONTRIBUTIONS TO THE IMPROVEMENT OF POLLUTION CONTROL IN LAKES AND AN APPLICATION FOR THE GOVORA LAKE
Environmental Engineering and Management Journal › Vol. 10 › Nr. 10 Abstract:In this paper, the mathematical model is improved by considering the density variations of the liquid from the pollution source vs.pollutant’s concentration of this liquid and by including the sorption-desorption term (SDT), which takes into account thisphysical process, played by a first-order decay model defined by two coefficients and an exponent. In order to practically use thisimproved mathematical model, the authors inferred the calculating relationships from automatic processin... Autori: Daniel Bucur, Esmeralda Chiorescu, Gheorghe Ţigaret ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25783
USE OF ARTIFICIAL NEURAL NETWORK FOR PREDICTION OF COAGULATION/FLOCCULATION PROCESS BY PAC IN WATER TREATMENT PLANT
Environmental Engineering and Management Journal › Vol. 10 › Nr. 11 Abstract:The paper presents the results of a study carried out using the Artificial Neural Network (ANN) for prediction the coagulation/flocculation process of suspended solids in water treatment plant (WTP). In this research 5 kinds of Poly Aluminum Chloride (PAC) as coagulant were used to examine the impact of coagulant kinds, PAC dosage and influent turbidity for removal of suspended solids. Determination of optimal coagulant doses is vital, as insufficient dosing will result in undesirable t... Autori: Gagik Badalians Gholikandi, Mohammad Delnavaz, Reza Riahi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25806
MONITORING AND MATHEMATICAL MODELING – IMPORTANT TOOLS FOR ENVIRONMENTAL PROBLEMS
Environmental Engineering and Management Journal › Vol. 10 › Nr. 11 Abstract:Analysis and debates of the scientific world and regional/local communities led to the conclusion that environmental problems are a global priority. European Union requested Member States the implementation of the Framework Directive specific for each environmental factor. In this context, Romania has pledged to achieve „good ecological status of water bodiesâ€? by the year 2015. The paper deals with the water quality monitoring of the Upper Olt River and the mathematical modeling of ... Autori: Gabriel-Oreste Sumbasacu, Nicolai Sîrbu, Virgil Petrescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25813
EVALUATING THE CLIMATIC CHANGES IN THE HYDROLOGICAL FLOW REGIME OF THE MOLDAVIAN AREAS
Environmental Engineering and Management Journal › Vol. 10 › Nr. 12 Increased intensity of precipitation events in a future climate provide result in a number of regions with improved, more detailed models. Many mathematical models include this part of hydrological cycle with implications regarding the climatic changes. The case study shows aspects regarding the climatic changes and its impact on designing the hydraulic structures and the hydrotechnical constructions behaviour in the case of extreme hydro-meteorological phenomena.... Autori: Catrinel-Raluca Giurma-Handley, Ioan Crăciun, Ion Giurma, , Valentin Boboc ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25836
ACTIVATED SLUDGE FLOC CHARACTERIZATION BY CONFOCAL LASER SCANNING MICROSCOPY
Environmental Engineering and Management Journal › Vol. 11 › Nr. 3 The aim of this work is the study of activated sludge floc samples stained with different dyes and imaged by Confocal Laser Scanning Microscopy (CLSM). Activated sludge flocs were stained for lipids, sugars and esterase enzyme producing bacteria. Images were acquired for different samples to analyze the structural characteristics of the bioaggregates. The analysis of the CLSM images allowed for the localization and estimation of the quantity of different build-up materials. The 3-D reconstructio... Autori: Bela Abraham, Botond Raduly, Dan Niculae Robescu, Szabolcs Lanyi, Szabolcs Szilveszter, Szilard Bucs ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25937
MATHEMATICAL MODELS TO SUPPORT POLLUTION COUNTERACTION IN CASE OF ACCIDENTS
Environmental Engineering and Management Journal › Vol. 11 › Nr. 1 This paper presents a mathematical model for the prediction of pollutant transport in rivers. The model has been developed and calibrated using the Matlab software and relying on field data from Romanian Someş River (collected in case of accidental cyanide release). Field data has been used to estimate model parameters (e.g. dispersion coefficient, velocity) as variable in time and space in order account for river features non-uniformity in time and also in space. These initial parameter va... Autori: Elisabeta-Cristina Ani, Vasile Mircea Cristea, Paul Serban Agachi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25848
THE IMPACT OF ORGANIC AND MINERAL FERTILIZERS ON THE YIELD AND MINERALS CONTENTS OF Fabaceae FROM PERMANENT GRASSLAND
Environmental Engineering and Management Journal › Vol. 11 › Nr. 1 This paper presents original studies about the influence of mineral and/or organic fertilization on the minerals contents (P, Na, K, Ca, Mg, Fe, Mn, Zn, Cu, Ni and Pb) in leguminous plants from permanent grassland situated in a hill area of Banat County. Determination of minerals in grassland is very important both for the nutritional or toxic effects of these elements and their compounds, in the plants, animals and environment. Phosphorous was analyzed colorimetric and all the others metals hav... Autori: Alexandru Moisuc, Iosif Gergen, Monica Harmanescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25858
EVALUATION OF DIFFERENT CONTROL STRATEGIES OF THE WASTE WATER TREATMENT PLANT BASED ON A MODIFIED ACTIVATED SLUDGE MODEL NO. 3
Environmental Engineering and Management Journal › Vol. 11 › Nr. 1 The first part of this work presents the development and implementation in the Benchmark Simulation Model No 1 (BSM1) of a modified Activated Sludge Model No 3 (ASM3). The enhanced ASM3 presented in this study has three modifications compared to the original ASM3. The first modification is the representation of the simultaneous heterotrophic biomass growth on the primary substrate and on the internal storage products. Second, nitrification is modeled as a two-step process with nitrite as an inte... Autori: George Simion Ostace, Paul Şerban Agachi, Vasile Mircea Cristea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25865
OPTIMIZATION PROCESS OF CADMIUM AND ZINC REMOVAL FROM SOIL BY PHYTOREMEDIATION USING Brassica napus AND Triticales sp.
Environmental Engineering and Management Journal › Vol. 11 › Nr. 2 In this paper, Cadmium and Zinc removal from soil by phytoremediation was investigated. The experiments were carried out with two types of plants, Brassica napus and Triticales sp. Response surface modeling and optimization of Cd and Zn removal rate was performed for each type of plant under controlled conditions, i.e. as a function of Cd concentration, Zn concentration and pH. Although the maximum heavy metal uptake (i.e. 2.4 % Cd removal rate and 1.80 % Zn removal rate, respectively) was obtai... Autori: Corneliu Pohontu, Gabriela Soreanu, Igor Creţescu, Matei Macoveanu, Paula Caraiman Cojocaru ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25881
NEW TECHNIQUE FOR SPEEDING UP THE WASTEWATER TREATMENT SIMULATIONS
Environmental Engineering and Management Journal › Vol. 11 › Nr. 2 The Landra Wastewater Treatment Expert System is developed by the University of Pannonia (Hungary, Veszpr?©m). The flexible, simulation-based software provides the possibility to choose the built-in mathematical models or the user may create a new one arbitrarily. A customized program codes can be created according to the technological description, the input data and the control strategy provided by the user. This way the efficiency and reliability of the system is significantly enhanced. An imp... Autori: , Endre Domokos, Tatiana Yuzhakova, Viola Somogyi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25888
MODELING THE IMPACT OF ROAD TRAFFIC ON AIR POLLUTION IN URBAN ENVIRONMENT CASE STUDY: A NEW OVERPASS IN THE CITY OF CRAIOVA
Environmental Engineering and Management Journal › Vol. 11 › Nr. 2 Since the last century, as a consequence of advanced industrialization, the remarkable growth of population, and its mobility have turned the field of transport into the main factor responsible for air pollution attributable to mobile sources of pollution. The continuous accumulation of various pollutants in the environment determines severe consequences on humans, animals and plants, buildings, works of art and landscape. Road transport represents, through its characteristic features – high f... Autori: Gabriela Mitran, Ion Tabacu, Sorin Ilie, Viorel Nicolae ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25898
ENHANCEMENT OF PHENOL OXIDATION BY OZONE IN WASTEWATER. II: KINETIC MODELING
Environmental Engineering and Management Journal › Vol. 11 › Nr. 2 Four processes have been used to enhance the ozonation of phenol in water: I-pH increasing (O3-pH), II- hydrogen peroxide addition (O3- H2O2), III- UV irradiation (O3- UV), and in the presence of both H2O2 and UV; IV-(O3- UV- H2O2). In each of these processes the rate of phenol degradation has two components: direct and indirect.... Autori: Eszter Arany, Ildiko Bartalis, Ilie Siminiceanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25904
SHALLOW GROUNDWATER HYDRO-CHEMICAL EVOLUTION AND SIMULATION WITH SPECIAL FOCUS ON GUANZHONG BASIN, CHINA
Environmental Engineering and Management Journal › Vol. 12 › Nr. 7 AbstractGroundwater hydrochemical evolution has influences on the rational use and conservation of water resources. This paper whichtakes MapGIS as the platform is aimed at demonstrating the evolution of shallow groundwater hydrochemistry in Guanzhongbasin (China) by adopting mathematical statistics, ratios of ion pair equivalents, geochemical simulation. The direction ofevolution is dependent on the geological, geomorphological, and hydrogeological conditions of the study area. The spatialdistr... Autori: Hua Tian, Lei Duan, Wenke Wang, Xiaoting Yang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25956
ENGINEERING CHALLENGES IN ADVANCED WASTEWATER TREATMENT
Environmental Engineering and Management Journal › Vol. 12 › Nr. 8 AbstractWastewater streams and particularly industrial effluents tend to increase in volumes and to get more complex in terms ofpollution. Nevertheless, nowadays the focus is directed towards recycling or reuse of treated wastewater so as to close the wateruse loop. Advanced wastewater treatment allows these possible applications by achieving good quality effluent to suit the newpurposes, but the implementation of this treatment stage is a difficult task. This study gives an example on how to ap... Autori: , Daniela Cailean, Florina Ungureanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25971
VOLUNTARY AGREEMENTS AS A WAY TO STIMULATE INDUSTRIAL ENVIRONMENTAL MANAGEMENT AND THEIR CONDITIONS FOR SUCCESS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 8 AbstractNumerous governments have adopted innovative policy instruments to deal with important environmental policy challenges.Various forms of negotiated instruments may offer the potential to improve on environmental performance beyond whatregulation alone can accomplish. Dutch covenants, which represent negotiated agreements with sectors of industry as targets ofbehavioral change in terms of mitigation of pollution, waste minimization and sustainable products and processes, provide auseful sa... Autori: , Kris Lulofs, Laura Franco, Theo de Bruijn, Yanyan Xue ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25972
SIMULATION OF PROCESSES IN PAPERMAKING BY WinGEMS SOFTWARE
Environmental Engineering and Management Journal › Vol. 12 › Nr. 8 AbstractThe WINGEMS software is a useful tool in analyzing, mathematical modeling and synthesis of chemical processes. Thissoftware can be applied to simulate various stages of the papermaking process. An example of simulation and modeling ofprocess is presented for paper stock preparation line for papermaking. On the basis of data obtained during process analysis, it ispossible to elaborate a strategy for control and monitoring of technological parameters and, while the efficiency of the proces... Autori: Corina Măluțan, Theodor Măluţan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25981
INSTRUMENTS FOR INTEGRATED WATER RESOURCES MANAGEMENT: WATER QUALITY MODELING FOR SUSTAINABLE WASTEWATER MANAGEMENT
Environmental Engineering and Management Journal › Vol. 12 › Nr. 8 AbstractThis study presents the development and use of a hydraulic-coupled water quality model for the simulation of BiochemicalOxygen Demand (BOD) concentrations in the Bahlui River, a small river located in northeastern Romania. This river experiencesthe typical pollution problems for many Romanian water bodies: heavy pollution from both diffuse and point sources, lowconnectivity to wastewater systems in rural areas and moderate removal of pollutants in municipal wastewater treatment plants.Th... Autori: , Claudia Cojocariu, Denie C.M. Augustijn, George Bârjoveanu, Ioan Crăciun ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25985
DEVELOPMENT OF AN EXPERT SYSTEM FOR SURFACE WATER QUALITY MONITORING IN THE CONTEXT OF SUSTAINABLE MANAGEMENT OF WATER RESOURCES
Environmental Engineering and Management Journal › Vol. 12 › Nr. 8 AbstractThe paper presents and discusses some aspects concerning the development of an expert system designed for surface watermonitoring in the context of sustainable management of water resources in Romania and neighboring countries. Technicalconsiderations, which are worthy to be included in the analysis of such kind of systems, are addressed: the system structure(number, type and location of hydrometric stations), number and type of measured indicators, transducers and sensors used formeasur... Autori: Anatolie Iavorschi, B. S. Nanda Kumar, Victor Sontea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25988
MODELING DEVICES SENSITIVITY ASSOCIATED TO THE SUSCEPTIBILITY OF ESD PHENOMENA
Environmental Engineering and Management Journal › Vol. 12 › Nr. 6 AbstractThe electrostatic discharge (ESD) event is a severe source of interference that can produce damages in any electronic system. Afull-body of an ESD generator is modeled using the Cadence IC 5.3 package software in order to reproduce the referencedischarge current assured by the standard specifications. The factors that introduce electromagnetic radiations into the systemshave also been investigated. Several tests based on proper matches between the parameters of the antenna were computed ... Autori: Alexandru Salceanu, Ana-Maria Nicuta, Oana Beniuga, Paul Bicleanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25993
COMPARATIVE ANALYSIS OF THE EXTREMELY LOW-FREQUENCY MAGNETIC FIELD EXPOSURE FROM OVERHEAD POWER LINES
Environmental Engineering and Management Journal › Vol. 12 › Nr. 6 AbstractThe aim of this study is to carry out a theoretical investigation of the extremely low-frequency (ELF) magnetic fields produced bytypical configurations of overhead power lines of the Romanian power grid. The computation of the magnetic flux density isachieved by the following two approaches: i) using an interactive LabVIEW program developed on fundamental formulas and ii)by numerical modeling with FEMM 4.2, a software package based on the finite-element method. Analytical results are th... Autori: Alexandru Salceanu, Eduard Lunca, Marcel Istrate ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25995
FLOW PATTERNS IN THE MAGNETIC NANOFLUID CORE OF A MINIATURE PLANAR SPIRAL TRANSFORMER
Environmental Engineering and Management Journal › Vol. 12 › Nr. 6 AbstractThis paper analyses mathematical models and numerical simulation results for a notional miniature, planar, spiral transformer(MPST) fabricated in MEMS technology, for galvanic separation, proposed to equip an electric harvesting device (EHD). Twotypes of core – ferrite and (partially) magnetic nanofluid – are considered. We found that magnetization body forces occur in thesuper-paramagnetic nanofluid core and they result in complex, steady state flows consisting of fully 3D recirculation... Autori: Alexandru Mihail Morega, Jean Bogdan Dumitru, Lucian Pîslaru-Dănescu, Mihaela Morega ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25998
Environmental Engineering and Management Journal - Vol 12, No 6
Environmental Engineering and Management Journal › Vol. 12 › Nr. 6 • STUDIES ON HEAT RECOVERY FROM CELLULOSIC TEXTILES FINISHING WASTEWATER • ASSESSMENT OF SYNERGIC REGULATORY ACTIONS OF SPRUCE BARK EXTRACT AND DEUTERIUM DEPLETED WATER ON MAIZE (Zea mays L.) CROPS • LUNG CANCER RISK INDUCED BY RESIDENTIAL RADON IN CLUJ AND ALBA COUNTIES, ROMANIA • A CLEAR SKY IRRADIATION ASSESSMENT USING THE ESRA MODEL AND SRTM DATABASE • ENVIRONMENTAL FACTORS ASSOCIATED WITH DYSPHONIA IN PROFESSIONAL VOICE USERS ... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26014
EMBANKMENT FAILURE MODELING USING THE HR BREACH MODEL
Environmental Engineering and Management Journal › Vol. 12 › Nr. 5 AbstractThe HR BREACH model is a physically based numerical model for the simulation of breach initiation and formation throughembankment dams, dykes, and flood embankments. The model is used for the analysis of homogenous as well ascomposite/zoned embankments. Simulation can also include the effect of surface protection such as grass or rock blocks. Twobreach failure modes are available: failure by overtopping and failure by piping. Breach growth can proceed through surfaceerosion or head-cut e... Autori: Andreja Jonoski, Ioana Popescu, Mark Morris, Mohamed Hassan, Tseganeh Gichamo ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26017
CFD MODELING AND SIMULATION OF A SURFACE WATER TREATMENT PILOT PLANT
Environmental Engineering and Management Journal › Vol. 12 › Nr. 5 AbstractThe hydrodynamics of two equipments from a surface water treatment pilot plant has been investigated through residence timedistribution (RTD) experiments using brine solution as tracer. Computational Fluid Dynamics (CFD) procedure, which isincreasingly utilized to study a wide variety of complex environmental fluid mechanics processes, was used to predict the flowpatterns and other properties of flowing fluids (e.g. velocity, concentration of species etc.). In this work, ANSYS Fluent 14.... Autori: Adina Pacala, Alain Liné, Alexandru-Dan Filep, Cosmina-Mariana Militaru, Teodor Todinca ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26030
EDITORIAL - A SPECIAL ISSUE DEDICATED TO ACHIEVEMENTS AND PROSPECTS IN HYDROTECHNICAL, GEODESY AND ENVIRONMENTAL ENGINEERING
Environmental Engineering and Management Journal › Vol. 12 › Nr. 4 In 2012, the Faculty of Hydrotechnics,Geodesy and Environmental Engineering of The"Gheorghe Asachi" Technical University of Iasi,Romania celebrated 50 years of education in the fieldof hydraulic engineering at the Polytechnic Instituteof Iasi.In 1948, in the same time with the EducationReform in Romania, in Galati, the Faculty ofHidrology was founded. At the same time, studentswho were attending the Rural EngineeringSpecialization in Bucharest were also transferred tothe new established Faculty.... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26048
CHARACTERIZATION OF CERTAIN SOIL PROCESSES USING SOFTWARE-BASED MODELING
Environmental Engineering and Management Journal › Vol. 12 › Nr. 4 AbstractSimulations using computer models require detailed knowledge of all processes in the soil. Mohid Land is an important modelingprogram developed by a research team from Lisbon. It is a continuous, distributed, variable time step watershed that is grouping 4compartments and water moves through them. In this paper, the authors discuss the procedure applied for modeling using Mohidprogram and the results obtained during simulation of the behaviour of a type of soil.... Autori: Adriana N. Unguraşu, Cristina E. Iurciuc, Daniela F. Anei, ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26049
ASSESSMENT OF THE IMPACT OF RIVERBED DESIGN ON WATER QUALITY – THE CASE STUDY OF BAHLUI RIVER, IAŞI, ROMANIA
Environmental Engineering and Management Journal › Vol. 12 › Nr. 4 AbstractIn 2010 in the area of Iasi city, Romania started the “Water-course regulation of Bahlui River, County of Iaşi” a project which inits first phase of development. It has as the main purpose to improve stream flow capacity and to guarantee the defending againstflood. Also, the project aim at developing a section of approximately 2.5 km located between the Stone Bridge (km 14+073) andTudor Vladimirescu Bridge (km 11+615) for recreational purposes. In order to obtain water storage, it i... Autori: Catrinel-Raluca Giurma-Handley, Costel Boariu, , Tomi-Alexăndrel Hrăniciuc ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26050
MODELING THE IMPACTS OF HUMAN ACTIVITIES ON WATER QUALITY OF JIJIA RIVER
Environmental Engineering and Management Journal › Vol. 12 › Nr. 4 AbstractQuality of water bodies is influenced by their ability to self-clean and disperse the existing substances in water originating fromnatural or anthropogenic sources. Creating mathematical models, using design software and simulation, in terms of surface waterquality monitoring, are standard design and interpretation of studies necessary for rational management of water resources. Andwe must respect the concept of "sustainable development”. In this paper we highlight this by modeling data ... Autori: Florentin Nacu, Ion Giurma, Valentin Boboc ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26056
MAPPING NITRATE LEVELS IN GROUNDWATER USING GIS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 4 AbstractThis paper is an analysis of a case study which entails the assessment of pollution degree with nitrate in the Prut river basin, byanalysing 23 wells. The novelty of this work is the use of modeling done by GIS techniques, namely the Digital Terrain Model(DTM) interpolation technique, to obtain further information starting from discrete information.In the present paper, we emphasized the increasing tendency of nitrates and nitrites content in the underground waters, in directcorrelation ... Autori: Florian Statescu, Gabriela Biali, Lucian Vasile Pavel ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26073
INVESTIGATION OF ISOTHERMAL AND FIXED-BED COLUMN SORPTION OF Cu (II) ONTO ALMOND SHELL
Environmental Engineering and Management Journal › Vol. 12 › Nr. 3 AbstractThe present study reports the efficiency of almond shell as a cheap and available material for the removal of Cu (II) fromcontaminated aqueous solutions. The equilibrium experiments indicated that Cu (II) sorption obeyed the Langmuir isotherm at26, 40 and 55oC. The highest value of the maximum uptake (Qo) from the Langmuir equation was found 6.783 mg g-1 at 40oC.The various thermodynamic parameters such as ΔGo, ΔHo and ΔSo were also calculated. The values of ΔGo varie... Autori: Soheil Aber ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26080
MATHEMATICAL MODELING OF THERMAL DESORPTION USING LINEAR REGRESSION ANALYSIS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 2
Abstract
The article presents the development of a mathematical model concerning thermal desorption in a tubular electric furnace, using
the linear regression analysis principle. With a range of experimental data obtained from some laboratory tests on water
evaporation plus pollutant (Hexaclorocyclohexane - HCH), evaporation resulting from the application of thermal desorption on
some soil samples; a mathematical model was developed to calculate the mass of substance evaporated fro... Autori: Calin Vasile Prodan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26125
FUZZY-BASED CLUSTERING OF EPICENTERS AND STRONG EARTHQUAKE-PRONE AREAS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 1
Abstract
An original Discrete Perfect Sets (DPS) algorithm was developed and applied to clustering of earthquake epicenters with M≥3.0
in California. The obtained clusters correspond well with the locations of the epicenters of strong earthquakes with M≥6.5.
This fact allows considering them as earthquake-prone areas for the magnitude M≥6.5. We compared the obtained clusters
with the areas recognized in 1976 using Earthquake-Prone Areas (EPA) method. The compariso... Autori: Alexei Gvishiani ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26132
BEHAVIOUR OF SOLID PARTICLES ON A FLAT OSCILLATING SURFACE
Environmental Engineering and Management Journal › Vol. 12 › Nr. 1
Abstract
In many industrial applications most of the solid particles are separated by size and for this purpose there are used the oscillating
sieves. The separation process based on sieves is a complex one and it depends on several factors, such as the properties of solid
particles submitted to the separation process and on the operating regimes of the separating equipment. We have studied the
separation process of the behaviour of solid particles on a flat oscillating surface... Autori: Ovidiu Bontas ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26134
NEW EXPERIMENTAL PARAMETERS FOR MONITORING ENERGY SPECTRA OF GAMMA-RAY RADIATIONS IN THE ENVIRONMENT
Environmental Engineering and Management Journal › Vol. 12 › Nr. 1
Abstract
Large amount of radioactive sources generate gamma rays of various energies and intensities. Gamma-ray spectroscopy is applied
for the quantitative study of the energy spectra of gamma-ray sources. In the present paper, a statistical analysis of the energy
spectra of gamma-ray spectroscopy monitored during 4 years at the “Dosimetry and Radioprotection” Laboratory from ”Vasile
Alecsandri” University of Bacău is provided. Several new mathematical parameters were calcula... Autori: Marius Stamate ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26144
DEMINERALIZATION OF WATER WITH MIXED-LAYER ION-EXCHANGERS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 1
Abstract
This paper develops a procedure whereby breakthrough curves obtained experimentally for ion exchange process in fixed bed ion
mixed exchangers during water demineralization, can be used to characterize quantitatively and optimize the ion exchange
process. In this regard, based on breakthrough curves there were developed statistical models that correlate three important factors
which influence the process (superficial fluid velocity through the layer, changing layer height,... Autori: Iuliana Rogoveanu Radosavlevici ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26147
ANALYSIS AND MODELLING OF THE SOLUBILITY OF BIOGAS COMPONENTS IN WATER FOR PHYSICAL ABSORPTION PROCESSES
Environmental Engineering and Management Journal › Vol. 12 › Nr. 1
Abstract
Biogas can be used as a renewable and green energy source by upgrading to natural gas. Water scrubbing, which is one of the
most widely-applied upgrading technologies, involves an accurate knowledge of the solubility of the main biogas components in
water, which is essential to the design and optimization of the biogas upgrading process.
In this work, we use several thermodynamic models available in the Aspen Plus software modeling environment to calculate the
solubilit... Autori: Petronela Cozma ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26148
A COUPLED KARST-POROUS GROUNDWATER MODEL BASED ON THE ADAPTED GENERAL HEAD BOUNDARY
Environmental Engineering and Management Journal › Vol. 12 › Nr. 9 AbstractGroundwater in karst aquifer and porous aquifer always have close hydraulic connection. However, groundwater in karst aquiferalways behaves as turbulent flow, while the porous groundwater flows in a laminar way. Due to the different flow properties, it is difficult to simulate the connection between the two types of groundwater simultaneously, in one model. This paper aims atdesigning a coupled model which is able to describe the hydraulic connection between the karst and porous groundwa... Autori: Yuqiao Long ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26156
UNRAVELLING THE RELATION BETWEEN THE ENVIRONMENTAL PROACTIVE ORIENTATION OF FIRMS AND THEIR ECONOMIC PERFORMANCE
Environmental Engineering and Management Journal › Vol. 12 › Nr.10 AbstractEnvironmental proactivity is a key research topic as it arises as a value-adding creator and therefore constitutes a competitiveadvantage for companies. In this paper, we classify industrial companies according to their environmental proactivity and thenwe determine whether their economic performance differs in relation to the firms’ environmental position. We analyzed 132Spanish industrial firms located in the Valencian region and apply quantitative methods to conduct the analysis. The ... Autori: María-del-Val Segarra-Ońa ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26194
ON THE ROLE OF ENVIRONMENTAL SUSTAINABILITY IN THE TRANSFORMATION OF TOURISM GROWTH INTO ECONOMIC DEVELOPMENT
Environmental Engineering and Management Journal › Vol. 12 › Nr.10 AbstractThough at a first sight the potential of tourism was advocated, without any doubt, as an routine tool for improving the welfare ofthe population, in recent years several works have appeared that criticize the universal validity of tourism as a development tool,whose premise is that the relationship is not automatic between the two dimensions, but instead a country must meet certaincharacteristics in order for this link to occur and, therefore, calls into question the solution implemented... Autori: Juan Ignacio Pulido-Fernández ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26197
GREEN TECHNOLOGY FOR 6-AMINOPENICILLANIC ACID PRODUCTION - STUDY OF PENICILLIN G HYDROLYSIS IN A BIOREACTOR WITH MOBILE BED OF IMMOBILIZED PENICILLIN AMIDASE UNDER SUBSTRATE INHIBITION
Environmental Engineering and Management Journal › Vol. 12 › Nr. 11 AbstractThe efficiency of enzymatic hydrolysis of Penicillin G to 6-Aminopenicillanic acid under substrate inhibition has been analyzedfor a bioreactor with mobile bed of immobilized penicillin amidase. The results indicated that the optimum values of temperatureand pH remained the same as for homogeneous hydrolysis using free enzyme. The inhibitory effect induced at higher PenicillinG amount in liquid phase was attenuated by increasing the size of the biocatalyst particles. For this reason, at ... Autori: Ramona Mihaela Matran ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26224
MODELING OF PERMEABLE PAVEMENTS FOR TREATMENT OF URBAN RUNOFF USING SELF-ORGANIZING MAPS
Environmental Engineering and Management Journal › Vol. 12 › Nr.12 AbstractKohonen Self-organizing map (KSOM) modeling have been applied increasingly for analysis, estimation and prediction ofseveral water quality processes, which are embedded with high complexity, dynamism and non-linearity. KSOM or unsupervisedneural networks were applied to microbial data (Escherichia coli, faecal streptococci, and total coliforms) from the effluent of atwo year data set (2008-2010) on two permeable (pervious) pavement systems used to treat storm water runoff contaminated wi... Autori: Kiran Tota-Maharaj ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26226
A NOVEL APPROACH FOR MODELING Cu2+ AND Zn2+ ADSORPTION FROM INDUSTRIAL LEACHATE BY PEANUT SHELLS
Environmental Engineering and Management Journal › Vol. 12 › Nr.12 AbstractIn this work the adsorption of Cu2+ and Zn2+ from industrial wastewater by peanut shells without any pretreatment wasinvestigated through optimization techniques such as a feed-forward back-propagation artificial neural network and a simplexalgorithm. The Levenberg-Marquardt algorithm was the best back-propagation algorithm, with a minimum mean squared error of0.000217 for Cu(II) and of 0.000229 for Zn2+. Mean square error on the validation set is used as an estimate for variance.Accordi... Autori: Başak Mesci ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26227
MODELING IMPACT OF LAND USE CHANGE TRAJECTORIES ON GROUNDWATER QUALITY USING REMOTE SENSING AND GIS
Environmental Engineering and Management Journal › Vol. 12 › Nr.12 AbstractWorld will face a major fresh water crisis in the coming decades due to high contaminants in surface and subsurface water.Groundwater is ultimate and most suitable fresh water resource for human consumption in both urban as well as rural areas. Thegroundwater quality reflects the information about the natural and anthropogenic source of pollution. This study aims todetermine the water quality status of the area and to deduce its relation to seasonal variations in land use/land cover (LUL... Autori: Prashant K. Srivastava ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26233
OPTIMIZATION OF PHOSPHATE REMOVAL FROM SYNTHETIC WASTEWATER BY BACTERIAL CONSORTIUM USING BOX-BEHNKEN DESIGN
Environmental Engineering and Management Journal › Vol. 12 › Nr.12 AbstractIn this work, a four factor three-level Box–Behnken factorial design based on response surface methodology (RSM) wasemployed to optimize the removal of phosphate from synthetic wastewater (mineral salts medium-MSM) by the bacterialconsortium (Bacillus sp. RS-1, Pseudomonas sp. YLW-7, Enterobacter sp. KLW-2). A mathematical model was then developedto show the effect of each medium composition and their interactions on phosphate removal. The effect of the lactoseconcentration (X1), pH (X2)... Autori: Krishnaswamy Usharani ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26235
SELF-ORGANIZING MAP TO ESTIMATE SUSTAINABLE FLOOD RETENTION BASIN TYPES AND VARIABLES
Environmental Engineering and Management Journal › Vol. 13 › Nr. 1 AbstractA sustainable flood retention basin (SFRB) is an impoundment or integrated wetland, which has a pre-defined or potential role inflood defense and diffuse pollution control that can be accomplished cost effectively through best management practice in urbanor remote regions. A database comprising 372 SFRB, which belong to 6 types and are characterized by 43 variables, has beendeveloped for the central Scotland area. However, the determination of SFRB types and some characterisation variabl... Autori: Qinli Yang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26264
EVALUATION OF THE WIND INFLUENCE IN MODELING THE BLACK SEA WAVE CONDITIONS
Environmental Engineering and Management Journal › Vol. 13 › Nr. 2 AbstractThe present work is focused on the importance of the resolution and accuracy of the wind fields in modeling waves in the Black Sea. Two different wind fields are considered for forcing the third generation spectral wave model SWAN. The wind data wave model results are compared against ‘in situ’ measurements performed at the Gloria drilling unit and also against satellite data for a two-month period of wintertime at the beginning of 2002. Subsequently, the model simulations were extended ... Autori: Dorin Butunoiu, Liliana Rusu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26283
A ROBUST INEXACT TYPE-2 FUZZY SETS LINEAR OPTIMIZATION PROGRAMMING FOR IRRIGATION WATER SYSTEM MANAGEMENT UNDER UNCERTAINTY
Environmental Engineering and Management Journal › Vol. 13 › Nr. 3 AbstractThis research introduces a new Robust Interval Type-2 Fuzzy Set Linear Programming (R-IT2FSLP) model to manage irrigationwater resources. This method improves upon previous interval fuzzy bound models by allowing uncertainties presented asmultiple fuzzy boundaries. It creates additional degrees of freedom and enable direct modeling of uncertainties within anoptimization framework. It more explicitly reflects the system’s uncertainties under the fuzzy membership function. The more ofR-IT2... Autori: Guohe Huang, Lei Jin ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26324
NUMERICAL AND EXPERIMENTAL STUDY ON THE THERMO-AERODYNAMIC BEHAVIOR OF A DOUBLE-SKIN GLAZED FAÇADE
Environmental Engineering and Management Journal › Vol. 13 › Nr. 4 AbstractThis paper presents a study of the thermoaerodynamic spectrum inside an asymmetrically heated vertical channel of a doubleskinfaçade. A double-skin façade is an envelope construction that consists of two transparent surfaces separated by an airchannel. The numerical modeling was developed using the Ansys-Fluent simulation software under conditions of forcedconvection, using a three-dimensional geometry and a “k-ε standard” turbulence model. Then, experimental tests were performedon ... Autori: Cătălin George Popovici, Cătălin Grigoraş, , Theodor Mateescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26332
MODELING HEAD LOSSES IN BIOLOGICAL AERATED FILTERS INCLUDING ACTIVE BIOMASS, INERT BIOMASS AND EXTRACELLULAR POLYMERIC SUBSTANCES
Environmental Engineering and Management Journal › Vol. 13 › Nr. 4 AbstractA deep understanding of the relationship between the solids deposition and head losses is vital to optimize the backwashing inbiological aerated filters (BAFs). In this article, the deposition solids were classified into four types: heterotrophic biomass,autotrophic biomass, inert biomass and extracellular polymeric substances (EPS). A concept model was developed to simulatethe solid deposition and the head loss development. The temporal and spatial distributions of the four types of sol... Autori: Chengda He, Dongsu Bi, Jun Wu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26347
COMPARATIVE ANALYSIS OF GLOBAL TRENDS IN ENERGY SUSTAINABILITY
Environmental Engineering and Management Journal › Vol. 13 › Nr. 4 AbstractThe importance of energy sustainability has been constantly growing in scientific, political and economic circles. The reason forthis lies in numerous energy and environmental issues that the entire world is facing on an everyday basis. There are severaltheories about the basic elements of energy sustainability. Nevertheless, the dominant current in scientific circles sees energysustainability as a concept relying on two basic elements: energy efficiency and renewable energy sources. Thi... Autori: Aleksandar M. Vuckovic, Dejan C. Petrovic, Marko M. Mihic ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26349
FACTORS AFFECTING BIOLOGICAL SULPHATE REDUCTION IN TANNERY WASTEWATER TREATMENT
Environmental Engineering and Management Journal › Vol. 13 › Nr. 4 AbstractA pilot scale Upflow Anaerobic Filter (UAF) treating tannery wastewaters was operated for 160 days. The UAF was fed with lowCOD/SO42- ratio (SO42- = 1810 mg L-1, CODtotal = 2530 mg L-1) for the investigation of sulphate and COD removal as a functionof substrates limitation and ammonia and sulphide inhibition. Sulphate-reducing bacteria (SRB) out-competed methanogenicbacteria due to the low influent COD/SO42- ratio, the high concentration of sulphide and the presence of inhibiting compoun... Autori: Alberto Mannucci, Claudio Lubello, Giulio Munz, Gualtiero Mori ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26353
SURVEY ON INTEGRATED MODELLING APPLIED IN ENVIRONMENTAL ENGINEERING AND MANAGEMENT
Environmental Engineering and Management Journal › Vol. 13 › Nr. 4 AbstractIn the context of the complexity of the environmental system, this paper addresses the problem of environmental modeling,considering the global aspects of sustainability as well as the linkage between environmental and economic issues. The survey onintegrated modeling highlights that the complexity of the environmental problems should be approached on the basis of multidisciplinarycooperation and studies. Furthermore, the European environmental standards and products quality standards im... Autori: Ion Viorel Matei, Laura Ungureanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26356
OPTIMIZATION OF ENERGY SAVING FOR WIRELESS SENSOR NETWORKS
Environmental Engineering and Management Journal › Vol. 13 › Nr. 5 AbstractWireless sensor network (WSN) has been widely used in national defense, military and security, environmental monitoring andmany other fields. It’s of great significance to design WSN which consumes little energy but supports service quality flexibly andeffectively. To further improve the performance of WSN, this article, focusing on aspects of low energy consumption and longlife cycle of the WSN and taking energy limits and coverage requirements in WSN into account, attributes the covera... Autori: Wenjuan Cheng, Yiming Tian, Yourui Huang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26359
MODELING AND SIMULATION OF VIRTUAL ENVIRONMENT SYSTEM OF COMPLEX COALMINE USING MULTI-AGENT TECHNOLOGY
Environmental Engineering and Management Journal › Vol. 13 › Nr. 5 AbstractInvestigating and exploring new methods of coal-mining environment has become a new project to resolve the safety of mineproduction. The virtual reality technology provides new ways and ideas for the safety of mine production, and the intelligence ofthe virtual environment is enhanced as the multi-agent is applied. Based on multi-agent technology and the investigation of themodeling approach of the virtual environment of the complex coal mine, a three-layer architecture model and the for... Autori: Chaoli Tang, Chunling Wang, Liguo Qu, Liuyi Ling ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26364
A CROSS-EFFICIENCY DATA ENVELOPMENT ANALYSIS (DEA) BASED MODEL FOR MEASURING ENVIRONMENTAL PERFORMANCE
Environmental Engineering and Management Journal › Vol. 13 › Nr. 5 AbstractUndesirable outputs are increasingly considered in data envelopment analysis (DEA) for environmental performance assessmentbecause of hot environment issues. However, many practical conditions are not considered during modeling undesirable outputtogether with desirable outputs and inputs. In this paper, we presented several new approaches with considering weightconstraints between undesirable outputs and inputs. Then we constructed cross-efficiency models for measuring eco-efficiency.Fin... Autori: Jing Yang, Xianguo Li, Zhixiang Zhou ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26366
ANALYSIS OF ENVIRONMENTAL AND ECONOMIC BENEFITS IN IRON AND STEEL ENTERPRISES BY ENTROPY WEIGHT FUZZY COMPREHENSIVE EVALUATION MODEL
Environmental Engineering and Management Journal › Vol. 13 › Nr. 5 AbstractTo assess the shares of each indicator of environmental and economic benefits in iron and steel enterprises, the entropy weightfuzzy comprehensive evaluation model is built in this paper based on the consideration of entropy theory and fuzzy mathematicaltheory. The weights of each indicator are determined by entropy optimal theory, and the correlative indicators are processed byfuzzy synthesis evaluation, so as to provide some references for environmental and economic benefits evaluation... Autori: Bin Wang, Hua Li ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26375
MODELING AND SIMULATION OF POWER ACTIVE FILTERS FOR REDUCING HARMONIC POLLUTION USING THE INSTANTANEOUS REACTIVE POWER THEORY
Environmental Engineering and Management Journal › Vol. 13 › Nr. 6 AbstractThe paper presents the structure of an active parallel filter for reducing harmonic pollution and reactive power. The active powerfilter control is based on instantaneous reactive power theory. The control is made in the system of axes - , which use directand inverse transformation to obtain the equations from one system to another coordinate axes. The authors present the modelingof parallel active filter based on this theory and the simulation results in MATLAB-SIMULINK... Autori: Marius Marcu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26397
COMPUTERIZED SIMULATION OF MINE VENTILATION NETWORKS FOR SUSTAINABLE DECISION MAKING PROCESS
Environmental Engineering and Management Journal › Vol. 13 › Nr. 6 AbstractThe simulation of different situations that may occur in the operation of the mine ventilation network is performed on its virtualmodel, developed and optimized using dedicated software. Depending on the chosen scenario, on the network model are applieda number of changes (addition of new ventilation workings, addition / removal of branches and nodes, changes in aerodynamicparameters: pressure, air flow driven by the fan etc.), the ultimate goals being: to assess how the new model obtain... Autori: Marius Cornel Șuvar ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26408
STUDY OF VARIABLE HEAT EXCHANGE BETWEEN A THICKNESS LIMITED CYLINDRICAL PIPE AND THE ROCK MASSIF FOR APPLICATION IN MINE ENVIRONMENT
Environmental Engineering and Management Journal › Vol. 13 › Nr. 6 AbstractThe problem the paper deals with is the determination of ground heat distribution on different distances inside a cylindrical minework. Both interior radius and the exterior radii of the cylinder are known. The use of the range of temperatures is useful for thecalculation of the heat exchange rock - air. Results dissemination allow the development of a mathematical, model which may be applied to a seriesof natural conditions as well as to different geometrical shapes closer or not to the... Autori: Dan Codruț Petrilean ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26417
MODELLING WASTEWATER TREATMENT PROCESS IN A SMALL PLANT USING A SEQUENCING BATCH REACTOR (SBR)
Environmental Engineering and Management Journal › Vol. 13 › Nr. 7 AbstractThe industrial development, the demographic growth and the limitation of the natural regions have determined a continuousdegradation of the water quality due to high concentrations and complexity of pollutants from the wastewater. The centralizedand decentralized treatment systems apply treatment procedures and techniques which can be complementary in solving theenvironmental pollution problems due to wastewater. In the present paper a three-dimensional mathematical model waselaborated b... Autori: Narcis Barsan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26422
MATHEMATICAL MODELLING OF WATER MIGRATION TIME IN SOIL
Environmental Engineering and Management Journal › Vol. 13 › Nr. 7 AbstractThis paper proposes a tridimensional mathematical model for water migration time in a soil sample, as a prerequisite for thestudy of migration of various liquid pollutants in soil. The variables taken into consideration were measurement position, soiltype, porosity and the height of soil column. The mathematical models were elaborated and tested based on experimental data,assisted by TableCurve 3D software for generating linear and non-linear equations. The proposed mathematical models o... Autori: Alexandra-Dana Chiţimuş ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26425
NEW VIABLE INDUSTRIAL WASTES MIX FOR FODDER YEASTS PRODUCTION
Environmental Engineering and Management Journal › Vol. 13 › Nr. 7 AbstractThe study aimed the diversification of fodder yeast assortments with viable economic effects while reducing the environmentpollution by capitalization of wastewaters with high monosaccharides content from pulp and paper industry and residual wheyfrom milk industry. Using the Response Surface Methodology the fabrication recipe has been optimized according to anexperimental program based on a mathematical model with biomass, protein and residual sugar as response functions. Theculture medi... Autori: Livia Manea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26429
NUMERICAL STUDY OF DESICCANT WHEEL BEHAVIOR FOR ENVIRONMENTALLY FRIENDLY AIR CONDITIONING SYSTEM
Environmental Engineering and Management Journal › Vol. 13 › Nr. 7 AbstractOpen-cycle desiccant air conditioning represents an attractive alternative to the classical method based on electric vaporcompression. The performance of the rotary dehumidifier has a significant effect on the capability, size and cost of the whole airconditioning system. In the present paper a detailed two-dimensional mathematical model of coupled heat and mass transferprocesses manifesting at the moist air-solid desiccant interface has been formulated. It was studied packed bed absorbe... Autori: Carmen Ema Panaite ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26434
EFFECTIVNESS OF SOIL AND WATER ASSESSMENT TOOL MODEL TO SIMULATE WATER FLOW IN A LARGE AGRICULTURAL COMPLEX WATERSHED: CASE OF BUYO LAKE BASIN, WEST OF CÔTE D’IVOIRE
Environmental Engineering and Management Journal › Vol. 13 › Nr. 7 AbstractThe objective of the study is to set up and calibrate a model using the soil and water assessment tool (SWAT) in order to simulatethe water flow in the Buyo Lake located in west of Cote d’Ivoire and to test and evaluate the usefulness and the performance ofthe model. In this study, we had used the ArcSWAT graphical user interface to manipulate and execute the major functions ofSWAT model from ArcGIS tool. Hydrological modeling of Buyo Lake Basin was carried out with the ArcSWAT interface... Autori: Tanoh Jean-Jacques Koua ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26442
MATHEMATICAL MODELLING OF SOUND PRESSURE LEVEL ATTENUATION TRANSMITTED BY AN ACOUSTIC SCREEN IN INDUSTRIAL ENVIRONMENT
Environmental Engineering and Management Journal › Vol. 13 › Nr. 7 AbstractThis paper presents a three-dimensional mathematical model which characterizes the variation of sound pressure levelpropagation and the variation of attenuation of the sound pressure level propagated in an enclosed space. The variable taken intoconsideration both in the experiments and in the mathematical modeling were: the positions of the acoustic screen to noisesource; the height of the microphone to record the sound pressure level for a variable number of walls. The mathematical mode... Autori: Claudia Tomozei ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26443
MODELING LEVELS OF ENVIRONMENTAL TEMPERATURES IN THE REGION OF RUSE, BULGARIA
Environmental Engineering and Management Journal › Vol. 13 › Nr. 7 AbstractThe purpose of this article is to elaborate a mathematical model for the prediction of average monthly environmental/outsidetemperature (T) levels in the region of Ruse, Bulgaria. Based on the method of harmonic analysis, amplitudes and phases of themain harmonic oscillations were defined. The results show the dominance of the first three harmonics for the period of theresearch. Visualization of experimental and theoretical values of the model shows a high degree of consistency between t... Autori: Stoyan Yanev ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26446
GROUNDWATER - UNDERGROUND STRUCTURES INTERACTION IN URBAN ENVIRONMENT IN BUCHAREST AREA
Environmental Engineering and Management Journal › Vol. 13 › Nr. 7 AbstractUnderground space represents an area with multiple management problems, mainly related to water resources management,difficulties for new underground constructions (as diaphragm walls, tunnels, dewatering systems etc.), interpretation of hydrogeologicaldata or influence of the new constructions on the existing ones. The management of this area is even more difficultdue to the multitude of works, of the (sometimes) chaotic development, of the poor legislation, various ownerships of the la... Autori: Loretta Batali ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26449
BIOSORPTION OF AMARANTH DYE FROM AQUEOUS SOLUTION BY ROOTS, LEAVES, STEMS AND THE WHOLE PLANT OF E. crassipes
Environmental Engineering and Management Journal › Vol. 13 › Nr. 8 AbstractIn the present work, the kinetics of amaranth dye biosorption onto the roots, stems, leaves and the whole plant of water hyacinth(Eichhornia crassipes) were studied for differential evaluation of the plant’s biosorptive potential to remove the toxic dye fromaqueous solutions. E. crassipes´ leaves showed the highest level of amaranth dye biosorption (43.1 mg/g), followed by the entireplant (31.18 mg/g), the roots (28.51 mg/g), and finally by the stems (23.97 mg/g). The same differential t... Autori: Imelda Guerrero-Coronilla ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26463
METHOD FOR INVENTORYING CO EMISSIONS FROM ROAD TRAFFIC IN URBAN AREAS THROUGH TRANSPORT MODELING
Environmental Engineering and Management Journal › Vol. 13 › Nr. 8 AbstractCarbon monoxide (CO) is a gas obtained both from natural sources (bush fires, volcanic emissions and electric discharges) andby anthropogenic processes (incomplete combustion of fossil fuels). Together with particulate matter, nitrogen oxides andhydrocarbons, it is part of the air pollutants associated with the transport sector, which have a negative impact on human health,animals and vegetation. In this paper the authors propose a methodology for assessing CO emissions from road traffic... Autori: Gabriela Mitran ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26466
COMPUTATIONAL FLUID DYNAMICS BASED MODELING OF A LINEAR HEAT SOURCE
Environmental Engineering and Management Journal › Vol. 13 › Nr. 8 AbstractIn this paper, a study is conducted to assess the ability and the accuracy of a CFD approach concerning the behavior of a linearheat source positioned in a test room. Firstly, the main characteristics of our numerical model (mesh generation, turbulencemodel, near wall treatment, radiation model and boundary conditions) are presented after a briefly description of the test roomtaken into account. In addition, we show also the significance of these issues within our CFD approach. Furthermo... Autori: Raluca Teodosiu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26467
DYNAMICS OF A RHIZODEGRADATION PILOT UNIT TREATING GROUNDWATER CONTAMINATED WITH BISPHENOL-A
Environmental Engineering and Management Journal › Vol. 13 › Nr. 9 AbstractBisphenol-A (BPA; 2,2-bis(4-hydroxyphenyl)propane) is a monomer used primarily in the production of polycarbonate andepoxy resins that has been reported to have estrogenic activity. The biodegradability of BPA has been previously investigated inseveral studies designed to simulate surface waters and biological wastewater treatment systems. However, there is littleinformation available about the phytoremediation of groundwater contaminated with BPA. Halophytic species are of specialintere... Autori: Margarita A. Petoussi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26493
DEFINING ENERGY- AND COST-SAVING POTENTIALS AND THEIR APPLICATION IN OPTIMAL BUILDING REFURBISHMENT
Environmental Engineering and Management Journal › Vol. 13 › Nr. 11 AbstractIn this paper, we develop a rigorous theoretical framework and a practical implementation for the evaluation of the energy- andcost-saving potential of buildings. The goal is to promote sustainability in the context of building energetics by achieving themost efficient, optimal exploitation of the financial resources available for refurbishments. The practical realization of thisconcept requires the evaluation of the optimal refurbishment cost that maximizes the net energetic or financia... Autori: Árpád Csík ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26535
MODELING AND VIBRATION ANALYSIS OF LIMESCALE DEPOSITION IN GEOTHERMAL PIPES
Environmental Engineering and Management Journal › Vol. 13 › Nr. 11 AbstractFailures of geothermal system pipes are often caused by limescale buildup on the walls of the pipes. The primary aim of thiswork is to investigate the influence of the scale formed on the walls of the pipes on the vibration parameters and naturalfrequencies of pipelines. To this end, the different phases of deposition are artificially simulated in the model experiments. In thedifferent states, vibration tests are preformed to evaluate the status of the pipe section and the rate of deposi... Autori: Dénes Kocsis ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26541
RENEWABLE ENERGY CONSUMPTION, R&D AND GDP IN EUROPEAN UNION COUNTRIES
Environmental Engineering and Management Journal › Vol. 13 › Nr. 11 AbstractThe relationship between the use of renewable energy sources and other characteristics of national economies has frequently beeninvestigated, and a wide range of approaches can be observed in publications. The aim of this study to examine the potentialrelationship between the ratio of renewable consumption in gross energy consumption, GDP per capita, and R&D expenditures inEuropean Union countries. Data are analyzed in their original forms, and a mathematical model is presented that ... Autori: Imre Kocsis ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26542
REMOVAL OF CADMIUM (II) FROM AQUEOUS MEDIA USING COOH/TUD-1 MESOPOROUS SOLID. KINETIC AND THERMODYNAMIC STUDIES
Environmental Engineering and Management Journal › Vol. 13 › Nr. 10 AbstractThe adsorption potential of 10 wt.% COOH/TUD-1 material for removing Cd2+ from aqueous solutions was investigated via thebatch technique, and the effects of pH, temperature and contact time were studied. Experimental data showed that the maximumCd2+ adsorption, 90%, occurred at pH 6. The adsorption equilibrium was reached within 35 min for 10 wt.% COOH/TUD-1. Theadsorption mechanism was investigated in terms of its thermodynamics and kinetics. The adsorption data were fitted using theLan... Autori: Nabila Bensacia ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26558
APPLICATION OF GIS TECHNIQUES FOR THE QUANTIFICATION OF LAND DEGRADATION CAUSED BY WATER EROSION
Environmental Engineering and Management Journal › Vol. 13 › Nr. 10 AbstractLand decay processes caused by erosion are very serious by their long term impact on the quality of soils, surface waters,environment and living standards. This article presents the results of a spatial erosion modelling. A new methodology is herebyproposed to estimate the soil losses caused by water erosion. The method is based on using GIS techniques, and its noveltyconsists in applying the mathematic calculation model on the pixel/ cell level, by using the “overlay” technique, which g... Autori: Gabriela Biali ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26559
APPLICATIONS OF PNEUMATIC BIOREACTORS IN WASTEWATERS TREATMENT 1. MIXING EFFICIENCY AND DISTRIBUTION IN SPLIT-CYLINDER GAS-LIFT BIOREACTOR FOR VISCOUS MEDIA
Environmental Engineering and Management Journal › Vol. 13 › Nr. 10 AbstractThe distribution of mixing time for a split-cylinder gas-lift bioreactor has been investigated for simulated broths with apparentviscosities up to 26 cP. The results indicated important variation of mixing time on the height of riser or downcomer, as well asdifferent behavior of dispersion flows in the two regions. Thus, the highest mixing efficiency for the ascending circulation hasbeen recorded for the intermediary positions, placed above the sparger. Contrary, for the downcomer, the i... Autori: Anca-Irina Galaction ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26560
ECONOMICAL OPTIMIZATION OF AN INDIRECT SOLAR CABINET DRYER BASED ON MATHEMATICAL MODELING
Environmental Engineering and Management Journal › Vol. 13 › Nr. 10 AbstractThis paper presents an optimization procedure to minimize the cost of drying in a solar cabinet dryer based on the results of amathematical model. The model has been developed previously for performance analysis of a solar cabinet dryer. The optimalvalues for geometry of the solar collector, mass flux of air through the collector, and initial moisture content are obtained in away that the drying cost is minimized. The results indicate that to optimize the drying cost, the best values of ... Autori: Samaneh Sami ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26564
KINETIC MODELING OF DIESEL OIL WASTEWATER DEGRADATION USING PHOTO-FENTON PROCESS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 1 Abstract
The objective of this study is to develop a mathematical model which would confidently predict the rate of substrate degradation
of an oil-water emulsion in a laboratory-scale completely-mixed continuous flow reactor using the photo-Fenton treatment
process. Two models are developed from first principles and the predicted substrate removal rates for both models are compared
with experimental data. The principal conclusions of the study are that both models produce good correlations ... Autori: Maha A. Tony ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26613
OPTIMIZATION OF REDUCTION OF COPPER USING Stenotrophomonas maltophilia PD2 BIOMASS AND ARTIFICIAL NEURAL NETWORK MODELING
Environmental Engineering and Management Journal › Vol. 14 › Nr. 1 OPTIMIZATION OF REDUCTION OF COPPER USING
Stenotrophomonas maltophilia PD2 BIOMASS
AND ARTIFICIAL NEURAL NETWORK MODELING
... Autori: Arpita Ghosh ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26616
FORECASTING THE PRESENCE OF Ca2+ AND Mg2+ CATIONS IN MINERAL WATERS. A MODEL BASED ON FUZZY LOGIC
Environmental Engineering and Management Journal › Vol. 14 › Nr. 1 Abstract
This paper aims to develop the theoretical framework and the applicative implementation of a new analysis method, which has the
purpose of determining and classifying mineral waters in Romania and Europe, with the use of mathematical modelling and fuzzy
logic. Firstly, the article underlines the properties of mineral waters in terms of curative effects, particularly the role of Ca2+ and
Mg2+ upon the human metabolism. The values of these two chemical elements will constitute an inde... Autori: Alina Stefanache ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26635
DEVELOPMENT AND OPTIMIZATION OF WATER BASED PAINT FORMULA IN ORDER TO REDUCE VOCs EMISSIONS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 2 Abstract
The interest in waterborne paints amelioration increased lately due to the toxicological effect of certain ingredients on human
health, the restrictive environmental legislation and the depletion and escalation in price of raw materials. Research efforts in
formulating waterborne paints are directed to insure low volatile organic compounds (VOCs) emission while maintaining and
even improving their properties.
This paper presents a waterborne paint formulation process. The required ... Autori: Andrei Ionut Simion ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26639
CASE STUDY ON ENERGY EFFICIENCY OF BIOGAS PRODUCTION IN INDUSTRIAL ANAEROBIC DIGESTERS AT MUNICIPAL WASTEWATER TREATMENT PLANTS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 2 Abstract
Anaerobic digestion was analyzed as the biological process that converts the organic matter present in various types of wastes,
activated sludge from the wastewater treatment facilities respectively, into biogas. Latest advancements in the mathematical
modeling, simulation and control practices have helped in gaining a better insight of the process. In this paper, an energy
efficiency and techno-economical investigation of anaerobic digestion technology for the CHP cogeneration unit... Autori: Alexandrina Zuza ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26648
DISTRIBUTION OF OXYGEN TRANSFER RATES IN STIRRED BIOREACTOR FOR DIFFERENT FERMENTATION BROTHS - OXYGEN-VECTOR DISPERSIONS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 2 Abstract
The oxygen transfer into the fermentation broths could be improved in presence of oxygen-vectors, without intensification of
mixing or aeration. The experimental results for simulated, P. shermanii and S. cerevisiae broths indicated the significant
increase of kLa, by adding n-dodecane, but the magnitude of this effect depends especially on the cells affinity for hydrocarbon
droplets. Therefore, due to the higher affinity of yeasts cells for hydrocarbon droplets during their entire ... Autori: Anca Irina Galaction ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26657
MATHEMATICAL MODELLING OF MECHANICAL BEHAVIOUR OF CELLULOSE-BASED FIBRES EXPOSED TO GAMMA RAYS AND HYDROTHERMAL TREATMENT
Environmental Engineering and Management Journal › Vol. 14 › Nr. 3 Abstract
The deterioration of the natural polymers is a very complex process, and a problem that can be best addressed through modelling.
The approach for modelling the rheological behaviour of different cellulose-based textile fibres (cotton, hemp, flax) when
subjected to a hydrothermal treatment, followed by exposure to different doses of gamma-rays (5, 10, 15 and 25 kGy) is
presented here. In order to predict the optimum radiation dose limit and hydrothermal aging time, the mathematical m... Autori: Angelica Olaru ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26678
GRIDDED POPULATION DISTRIBUTION MAP FOR THE HEBEI PROVINCE OF CHINA
Environmental Engineering and Management Journal › Vol. 14 › Nr. 3 Abstract
Mapping the distribution of populations has become an important issue in geographical and relative researchers. Combining
population and spatial data allows for socio-graphic information to be visualized, in order to evaluate the total numbers of people
at risk of environmental health hazards, who have died in natural disasters etc. Therefore, spatial distribution of population data is
an effective way to integrate statistical and spatial data. This paper presents a multi-factor dat... Autori: Yu Zhang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26686
A FUZZY NON-RADIAL DATA ENVELOPMENT ANALYSIS (DEA) APPROACH TO MEASURE REGIONAL ENVIRONMENTAL PERFORMANCE OF CHINA
Environmental Engineering and Management Journal › Vol. 14 › Nr. 4 Abstract
Data envelopment analysis (DEA) has been recently utilized as a multiple criteria tool for environmental performance evaluation
by incorporating undesirable outputs. Most DEA models to measure environmental performance follows the assumptions of crisp
data and radial measures. In this paper, we present a fuzzy non-radial DEA approach with Russell measure for environmental
performance evaluation. A pair of bi-level mathematical programs is formulated to calculate the lower and upper ... Autori: Zhongbao Zhou ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26691
MODELING ENVIRONMENTAL IMPACT OF CYBERNETIC TRANSPORTATION SYSTEM
Environmental Engineering and Management Journal › Vol. 14 › Nr. 5 Abstract
Cybernetic Transportation System (CTS) is a relatively new branch of the Intelligent Transportation System, which can provide
flexible transportation services for university campuses, resorts, and industrial parks. The proposed simulation approach is
suitable for a preliminary assessment of CTS-related environmental impact in real-world driving conditions. The model is built to
allow performance prediction of a single cybercar or the whole CTS in a wide range of operational conditio... Autori: Leonid Tartakovsky ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26737
MODELING THE MIXING PROCESS OF INDUSTRIAL AND DOMESTIC WASTEWATER SLUDGE
Environmental Engineering and Management Journal › Vol. 14 › Nr. 6 Abstract
An experimental study of mixing in autoclave vessel equipped with an anchor impeller was performed on the sludge proceeding
from the treatment of mixed municipal and industrial wastewater. This unit operation is part of a process for the recovery of
sludge. The mathematical modelling of the mixing was done having in view the scaling-up of this process. The mathematical
model allows the calculation of the mixing power N as a function of the impeller diameter d, the vessel diameter D,... Autori: Ancaelena Eliza Sterpu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26744
NETWORK ANALYSIS FOR RESILIENCE EVALUATION IN WATER DISTRIBUTION NETWORKS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 6 Abstract
Resilience is meant in this paper as the capability of a networked infrastructure to provide its service even if some components
are failed: it depends both on net-wide measures of connectivity and the role of a single component. This paper has two
objectives: first to show how a set of global measures can be obtained using techniques from network theory, in particular how
the spectral analysis of the adjacency and Laplacian matrices allows us to obtain a characterization of global ... Autori: Antonio Candelieri ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26746
EXTREME RISK ASSESSMENT METHODOLOGY (ERAM) IN AVIATION SYSTEMS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 6 Abstract
The research is focused on the relationship between aviation systems and extreme terrorist events, the impacts of such events, and
the solutions to manage the associated risks on medium and long term. The development of predictive models for extremeasymmetric
events in aviation (EAEA) still represents an emerging direction of interdisciplinary research because not all
mechanisms and interactions are understood. The testing of models is difficult due to lack of data and interpretatio... Autori: Catalin Cioaca ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26762
LIQUID INJECTION TO ENHANCE BIOGAS PRODUCTION IN LANDFILLS FOR PRETREATED MUNICIPAL SOLID WASTES - BIO.LEA.R. PROJECT (LIFE+ PROGRAM)
Environmental Engineering and Management Journal › Vol. 14 › Nr. 7 Abstract
The Bio.Lea.R project aims to demonstrate the performance of a landfill for less reactive, biologically treated waste (pretreated
organic wastes) compared to a conventionally managed landfill, with regard to both environmental (biogas and leachate
production) and economic aspects. The objective is to control the pretreated biodegradable waste through a liquid injection in
order to achieve the same biogas quantity in a shorter time than in conventional landfill.
Laboratory and full ... Autori: Alberto Godio ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26784
EFFECT OF NICKEL CONTAMINATION ON THE GROWTH OF OLEAGINOUS YEASTS IN HYDROLISATES OF Arundo donax
Environmental Engineering and Management Journal › Vol. 14 › Nr. 7 Abstract
Hydrolysates of Arundo donax, a crop offering high productivity in contaminated or salinized soils with no inputs of irrigation
and agrochemicals, were used in a discontinuous fermenter to grow the oleaginous yeast Lipomyces starkey, to obtain microbial
oils potentially useful for the production of 2nd-generation biodiesel.
A mixture of fermentable sugars was obtained by steam-explosion and subsequent enzymatic hydrolysis of the lignocellulosic
materials. The concentration of Ni2+ ... Autori: Domenico Pirozzi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26789
DEALING WITH LCA MODELING FOR THE END OF LIFE OF MECHATRONIC PRODUCTS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 7 Abstract
This paper discusses end-of-life (EoL) modeling issues in Life Cycle Assessment (LCA), through the application to a domestic
cooker hood. Two EoL approaches are applied and discussed, namely the avoided burden and the one recommended by the
Product Environmental Footprint (PEF) Guide, presently under testing. While no case studies on PEF application have been
published yet, to the best of our knowledge, the scientific community is questioning the robustness and relevance of some
me... Autori: Francesca Reale ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26790
DYNAMICS ANALYSIS OF A MICROBIAL FUEL CELL SYSTEM AND PID CONTROL OF ITS POWER AND CURRENT BASED ON THE CRITICAL PROPORTION DEGREE METHOD
Environmental Engineering and Management Journal › Vol. 14 › Nr. 8 Abstract
In this paper, the structure and working principles of a microbial fuel cell (MFC) are analysed, and a mathematical simulation
model of MFCs is established based on the electrochemical equation, kinetic equation and material balance equation of a MFC. A
simulation analysis and discussions are conducted in a MATLAB environment to investigate the effect of acetate concentration,
influent flow and external resistance on the performance of a MFC system. The simulation model is demonstra... Autori: Aimin An ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26803
IDENTIFICATION OF NONPOINT SOURCE OF POLLUTION WITH NITROGEN BASED ON SOIL AND WATER ASSESSMENT TOOL (SWAT) IN QINHUANGDAO CITY, CHINA
Environmental Engineering and Management Journal › Vol. 14 › Nr. 8 Abstract
The identification of the critical source of nonpoint source pollution (NPS) plays an important role in formulation of Best
Management Practices (BMPs). SWAT (Soil and Water Assessment Tool) was adopted for NPS nitrogen pollution modeling for
Qinhuangdao City. The model was calibrated and validated by Sequential Uncertainty Fitting Version 2 algorithm of SWATCUP
(SWAT Calibration and Uncertainty Programs) software. The model was used to quantify contributions of different
nitrogen ... Autori: Jihong Qu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26810
MULTIPLE MODELING PARADIGMS APPLIED FOR ACCIDENTAL POLLUTION MANAGEMENT
Environmental Engineering and Management Journal › Vol. 14 › Nr. 9 Abstract
Models are very important in the development of information systems for water management and they concern not only hydrology
aspects, but also representations of complex software applications. Their conception requires big and orchestrated efforts of various
stakeholders, like hydrologists, software and electrical engineers, emergency professionals, GIS specialists and ecologists. Water
management blends multi-disciplinary aspects; therefore software analysis and design for this dom... Autori: Anca Daniela Ionita ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26829
APPLICATION OF BAYESIAN STATIC GAMES IN RIVER WATER QUALITY MANAGEMENT
Environmental Engineering and Management Journal › Vol. 14 › Nr. 9 Abstract
One of the imperative concerns in river water quality management is to develop pollution control strategies, which are
satisfactory for all pollution load dischargers. The game theory can be applied for modeling the natural process of decision
making among dischargers under the condition of having just one water quality checkpoint in a river reach, which receives
pollution loads of several dischargers who would be penalized for any water quality violation from the standards. In this... Autori: Armaghan Abed-Elmdoust ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26834
NUMERICAL ANALYSIS OF Cu AND Ni BASED CATALYSTS IN THE HYDROGENATION PROCESS OF GLYCEROL
Environmental Engineering and Management Journal › Vol. 14 › Nr. 9 Abstract
The paper describes a numerical analysis concerning the behaviour of Cu and Ni based catalysts having different mole ratios of Ni
to Cu in the process of glycerol hydrogenolysis. The impregnation technique was used to prepare the copper and nickel based
catalysts. Our study revealed that their performances are different and depends on the Ni/Cu ratio. The catalysts were tested using
various reaction conditions, such as time and temperature, and their performances analysed based on t... Autori: Adriana Marinoiu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26843
COLOR REMOVAL OF REACTIVE TEXTILE DYES FROM AQUEOUS SOLUTION BY RAW AND MODIFIED FUNGAL BIOSORBENT
Environmental Engineering and Management Journal › Vol. 14 › Nr. 10 Abstract
This study concentrates on the reactive biosorption of dyes such as Reactive Red 3:1 (RR3:1), Reactive Orange 13 (RO13),
Reactive Blue 13 (RB13), Reactive Blue 72 (RB72). The modified fungal biosorbent, Paecilomyces sp., had a higher dye
biosorption yield in our study. 100% of biosorption yield observed on RR3:1 and RB13 and 94.09% of color removal of RO13
with the chemically modified biosorbent were great. Also, such modified biosorbent exhibited remarkable performance in
simulate... Autori: Ahmet Çabuk ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26860
NUMERICAL SIMULATION OF THE OXYGENATION PROCESS IN A GROWING SUPERINTENSIVE FISH TANK
Environmental Engineering and Management Journal › Vol. 14 › Nr. 10 Abstract
Superintensive growth of fish in a controlled environment involves taking a series of measures to ensure the oxygen necessary to
provide optimal living conditions for stocks. Considering the fact that oxygen has a relatively low solubility in water, the
photosynthesis in basins does not occur and the rate of incoming water may be low, it is imperative to supplement the water with
oxygen. The paper presents theoretical researches on mathematical modelling and numerical simulation of ... Autori: Vasilica Ştefan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26871
OPTIMIZATION OF URBAN SELECTIVE WASTE COLLECTION ACTIVITY: GALATI CITY CASE STUDY
Environmental Engineering and Management Journal › Vol. 14 › Nr. 10 Abstract
The Waste Management activity (WM) is an urban action becoming more and more important in the municipal economy. In
many cities, this activity is linked to significant revenues from the selective waste collection services. Because the current
economic situation requires an increasing efficiency and profitability in order to succeed in cutting the operational costs, and as
an important part of revenue comes from this selective waste collection activity, the effectiveness must be impr... Autori: Gabriel Murariu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26872
HAZARDOUS PROPERTIES OF AMMONIUM NITRATE AND MODELING OF EXPLOSIONS USING TNT EQUIVALENCY
Environmental Engineering and Management Journal › Vol. 14 › Nr. 11 Abstract
The paper presents a study on the hazards associated with solid ammonium nitrate (AN) storage and handling, in particular the
hazard of explosion. Due to its flammable and explosive characteristics, AN is largely used as an explosive material in the
mining industry. Some specific problems encountered in the risk estimation are related to the determination of the explosive
power of the AN, which depends on several characteristics. The simulation results of AN explosion using differen... Autori: Zoltán Török ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26891
ELECTROCHEMICAL AND SEM CHARACTERIZATION OF YsZ COATED CoCrMo ALLOY PROCESSED BY PLASMA SPRAYED TECHNIQUE
Environmental Engineering and Management Journal › Vol. 14 › Nr. 11 Abstract
The CoCrMo alloys have been widely used in artificial knee or hip joints. It is well known that these materials have a good
corrosion resistance and acceptable biocompatibility properties. Zirconia as a ceramic biomaterial facilitates the
osteoconductivity and tissue osteogenetic capacity in new bone formation around implant. Linear polarization and
electrochemical impedance spectroscopy (EIS) were employed to characterize the electrochemical behavior of plasma sprayed
yttrium oxid... Autori: Manuela Romaş ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26896
BELGRADE SOLID WASTE MANAGEMENT OPTIMIZATION - POTENTIAL OF LANDFILL GAS RECOVERY
Environmental Engineering and Management Journal › Vol. 14 › Nr. 12 Abstract
Establishing a management system for collecting and disposing the solid waste materials is of great importance in urban areas.
Belgrade, the capital city of Serbia, is at its initial phase of managing this problem. Currently, landfill disposal is the main option
for dealing with rapidly growing amounts of waste. This paper’s research goal is to estimate the landfill gas quantity at
Belgrade’s only landfill site Vinca, and to estimate the potential for collection and util... Autori: Vesna Alivojvodic ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26923
AN EVALUATION OF BLUE WATER PREDICTION IN SOUTHERN PART OF IRAN USING THE SOIL AND WATER ASSESSMENT TOOL (SWAT)
Environmental Engineering and Management Journal › Vol. 15 › Nr. 1 Soil and water are the two major resources in the Earth’s hydro biological and geological systems. The hydrology of arid areas
has become a topic of interest recently for hydrologists as water shortage at these areas can affect the agriculture, irrigation, and
industry as a whole. This has also prompted water resource planners to more thoroughly investigate water resource crisis at arid
areas. In this respect, the Soil and Water Assessment Tool (SWAT), a semi-distributed hydrological mo... Autori: Milad Jajarmizadeh ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26941
OPTIMIZATION OF THE COMBINED UV/ELECTROCOAGULATION PROCESS FOR DYE REMOVAL FROM TEXTILE WASTEWATER USING RESPONSE SURFACE METHODOLOGY
Environmental Engineering and Management Journal › Vol. 15 › Nr. 1 In this study, response surface methodology (RSM) method was applied based on a five-level and four-variable central composite
design. The optimization of the C.I. Direct Red 81 (DR81) removal by the combination of electrocoagulation (EC) and UV
processes was also performed. The effect of initial pH, reaction time, current density and initial dye concentration on the dye
removal was investigated to obtain the optimal experimental conditions. The optimal conditions with the dye removal of 95%
... Autori: Elmira Pajootan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26942
DETERMINANTS OF ENERGY CONSERVATION INTENTION: EVIDENCE FROM MALAYSIAN UNIVERSITIES
Environmental Engineering and Management Journal › Vol. 15 › Nr. 1 Fostering energy conservation behavior is an important component of moving towards a sustainable energy future. This study
aims to identify the key determinants predicting energy conservation intention in a university setting. The theory of planned
behavior is adopted as the theoretical framework to investigate the underlying determinants of energy conservation intention
using structural equation modeling analysis. A total of 2,000 students from the five leading public universities in Malaysi... Autori: Low Sheau-Ting ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26946
THE IMPACT OF SLOPE ON FIRE SPREAD SIMULATION
Environmental Engineering and Management Journal › Vol. 15 › Nr. 3 Every year a lot of hectares of forest are burn in Europe, especially in the south part of Europe, where the climate is hot and dry
during the summer. Last decades, with climate change, this part of the Europe becomes dryer and increase of the field fires is
observed. The same problems arise in northern America, Australia and other dry regions. A model field fire spread can have
several applications. The prevision of the fire front can help the fireman to optimize their work, and to reduce th... Autori: Stefka Fidanova ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26973
GEOCHEMISTRY AND QUALITY ASSESSMENT OF SURFACE WATER IN AN ACTIVE COAL WASHING PLANT OF NORTHERN IRAN
Environmental Engineering and Management Journal › Vol. 15 › Nr. 4 Drainage water and tailings impoundments water geochemistry (pH, EC, alkalinity, trace element concentrations, major ions) were
studied at the Anjir Tangeh coal washing plant. The drainage water with neutral to alkaline pH values, high SO42- concentration
and low metal content represented typical neutral alkaline mine drainage (NAMD). According to the Stiff and Piper diagrams, the
majority of water samples classified into Ca-Mg-HCO3- type except drainage and processing water which were placed... Autori: Majid Shahhosseini ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26997
ASSESSING THE ROLE OF Phragmites australis IN WASTEWATER TREATMENT THROUGH RESPONSE SURFACE METHODOLOGY
Environmental Engineering and Management Journal › Vol. 15 › Nr. 4 Treatment of domestic wastewater using constructed wetland system vegetated with Phragmites australis was studied at lab
scale. Response surface methodology (RSM) a mathematical model was employed for analyzing the effect of independent factors
(inlet flow rate, outlet flow rate, retention time) on wastewater parameters e.g. electrical conductivity, BOD5, COD, nitrates,
phosphates, total solids, suspended solids, heavy metals in order to maximally treat wastewater. All independent variables w... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26999
BATCH COMPOSITION OPTIMIZATION FOR THE COPPER SMELTING PROCESS ON THE EXAMPLE OF COPPER SMELTER IN BOR
Environmental Engineering and Management Journal › Vol. 15 › Nr. 4 This paper presents a mathematical model developed to solve the problem of adequate blending composition for copper smelting
process and it is exclusively for the purpose of the case study in "RTB BOR" (Copper Smelter in Bor). The model proposes an
objective function, which maximizes the profit by calculating both the “penalties” for the hazardous concentrate elements and
“benefits” for the useful ones. Apart from the basic constraints of the existing mathema... Autori: Ivan Jovanović ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27002
EFFECT OF WATER FLOW RATE ON COOLING EFFECTIVENESS AND AIR TEMPERATURE CHANGE IN EVAPORATIVE COOLING PAD SYSTEMS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 4 In this study, it was aimed to determine the relationship between the temperature decrease of the air passing through the pad and
flow rate of pad wetting water for pad evaporative cooling. In the experiments, a commercially available cellulose based
evaporative cooling pad (CELdek®7060-15 pad) was used. Experiments were conducted at three different water flow rates (2 L
min-1 m-2; 4 L min-1 m-2 and 6 L min-1 m-2) and two different air velocities (1.0 m sec-1 and 1.5 m sec-1). The tempera... Autori: Cengiz Karaca ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27006
IN VITRO ELECTROCHEMICAL PROPERTIES OF BIODEGRADABLE YSZ-COATED MgCa ALLOY
Environmental Engineering and Management Journal › Vol. 15 › Nr. 5 Zirconia (ZrO2) as a ceramic biomaterial facilitates the osteoconductivity in new bone formation around implant. Surface
characterization before and after electrochemical testing was performed used scanning electron microscopy (SEM). The
electrochemical properties of the yttrium oxide stabilized zirconium oxide (YSZ) coated and uncoated MgCa sample with the
open circuit potential at different immersion time in Ringer’s solution were studied by electrochemical impedance spectroscopy
(EI... Autori: Bogdan Istrate ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27021
IMPROVING THE NUTRITIONAL QUALITY OF FODDER YEASTS BY ADDING MINERALS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 5 The aim of this study was the diversification of fodder yeast assortments with viable economic effects while reducing the
pollution to the environment by capitalisation of wastewaters with high monosaccharides content from pulp and paper industry.
As inoculum, in the bioreactor, a mixture of two species of yeasts Candida utilis and Candida arboreea (1:1 ratio) was used at
38°C, pH 5.5 and an air flow of 0.02 L/h was insured. Wastewaters from technological process of pulping of softwood wi... Autori: Andrei I. Simion ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27028
MODELLING AND SIMULATION OF HEAT TRANSFER PROCESSES FOR HEAT EXCHANGERS USED IN WASTEWATER TREATMENT
Environmental Engineering and Management Journal › Vol. 15 › Nr. 5 The issues of global warming and reducing energy consumption led to an evolutionary progress of research to find as many
solutions as possible for solving these environmental issues. The need to ensure a sustainable energetic development while
achieving effective protection of the environment has led to the amplification of activities based on secondary energetic resources
combined with low energy consumption industrial technologies. In the present paper it is discussed how to recover thermal... Autori: Timea Gabor ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27030
MAPS OF HEAVY METALS IN CLUJ COUNTY SOILS DEVELOPED USING THE REGRESSION-KRIGING METHOD
Environmental Engineering and Management Journal › Vol. 15 › Nr. 5 Knowledge of the basic levels of heavy metal concentrations in soil and their spatial disposition, on a certain area, is particularly
important for economic activities, but especially for preventing and stopping pollution. The spatial distribution maps, obtained by
measurements performed (of a certain density), cover the entire studied area and are very useful. According to the literature
several methods are known for building such maps, most of them based on a simple mathematical interpolati... Autori: George-Călin Rogozan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27031
ADJUSTING 3D GEODETIC NETWORK USING BOTH GLOBAL NAVIGATION SATELLITE SYSTEMS TECHNOLOGY (GNSS) AND TERRESTRIAL MEASUREMENTS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 6 There are many models developed for the adjustment of the 2D or 2D+1D geodetic networks, both on the ellipsoid surface and in
the map projection plane. These models are widely used by practitioners. In this paper we presented two new mathematical
models for the adjustment of combined geodetic measurements and networks (those collected using Global Navigation Satellite
System (GNSS) technology plus earlier terrestrial methods). Such combined networks can be adjusted either in a Cartesian
geoc... Autori: Andrei-Șerban Ilie ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27051
ASSESSMENT OF WATER QUALITY IMPACTS OF LAND USE AND MANAGEMENT PRACTICES IN A SUBURBAN WATERSHED
Environmental Engineering and Management Journal › Vol. 15 › Nr. 7 While the water quality issues in suburban watersheds have been greatly attributed to rapid urban development and stormwater
runoff, pollution contribution from agricultural practices are still significant but often overlooked. The objective of this study is
to assess water quality impacts of managing both agricultural and urban lands in a suburban watershed. Neshanic River
watershed is a headwater watershed with mixed land uses located in Hunterdon County, New Jersey, USA. It has 40% of
agr... Autori: Zeyuan Qiu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27081
A FRACTIONAL FUZZY SIMULATION METHOD FOR PREDICTING DISSOLVED TOLUENE AND OXYGEN CONCENTRATIONS IN AQUIFERS UNDER MICROBIAL ATTENUATION
Environmental Engineering and Management Journal › Vol. 15 › Nr. 8 This study proposes a modified fractional fuzzy simulation (MFFS) method to predict the toluene and oxygen concentrations in
aquifers under microbial attenuation conditions. The method integrates the modeling of groundwater flow contaminant transport
and fuzzy parameters analysis within a general framework. Compared to conventional fractional fuzzy simulation (FFS),
decreased interior points of fuzzy parameters need to be used, thus reducing the simulation time. The method is applied to an
a... Autori: Li He ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27106
DERIVING THE FLOODPLAIN IN RURAL AREAS FOR HIGH EXCEEDANCE PROBABILITY HAVING LIMITED DATA SOURCE
Environmental Engineering and Management Journal › Vol. 15 › Nr. 8 Hydraulic modelling makes possible the identification of floodplain areas for flash floods with discharge of different return
periods. High resolution DEMs allow river bed geometry identification, while prior hydrologic modeling results can serve as
input data for the hydraulic model. Once the river bed and floodplain roughness coefficient are set, the floodplains can be
delineated on the base of MIKE11 model. For the present study the authors have used three gauged small rivers situated in t... Autori: Maria-Mihaela Győri ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27115
PRODUCTION CAPACITY OF LEACHATE FROM BIHOR LANDFILL
Environmental Engineering and Management Journal › Vol. 15 › Nr. 9 Landfilling is one of the most important issues that can be discussed nowadays related to waste management, mainly concerning
the importance of what we have to do with waste quantities and how energy can be recovered. The paper proposes a threedimensional
mathematical model applied to calculate the production capacity of leachate from Bihor landfill, situated in Bihor
County, Romania. The leachate production capacity is related to the total amount of waste disposed in landfill during active
... Autori: Mihai-Cosmin Belciu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27136
DIFFUSION CHARGING EFFECTS ON PM10 COLLECTION EFFICIENCY IN A WIRE-PIPE ESP UNDER MULTI-FIELD COUPLING
Environmental Engineering and Management Journal › Vol. 15 › Nr. 11 In this study, a mathematical model was introduced to calculate the collection efficiency of dust particles in a wire-pipe single-stage electrostatic precipitator (ESP). The aerodynamic diameters of these particles are less than 10 μm (PM10). The mathematical model, using combined Deutsch-Anderson Equation, considers coupling effects among gas flow field, electric field and particle field. A simplified 2-D ESP model was established using GAMBIT and a software application (FLUENT) was used to ... Autori: Jian-Ping Zhang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27172
PRODUCTION OF PAPER AND LIGNIN FROM Hesperaloe funifera
Environmental Engineering and Management Journal › Vol. 15 › Nr. 11 Hesperaloe funifera was studied as a new raw material for paper manufacturing and lignin recovery. An experimental design was carried out to improve the quality of the obtained pulp varying the process temperature (155, 170 and 185 ºC), time reaction (20, 40 and 60 minutes) and soda concentration (5, 10 and 15 %). All experiments were carried out with 1% anthraquinone. Lignin content, holocellulose content, α-cellulose, viscosity, Kappa number and drainability were determined in the d... Autori: MŞ Ángeles de Andrés ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27185
A NEW SIMPLE MODEL FOR THE PREDICTION OFWASTE SLUDGE FLOW RATE IN THE STEADY-STATE COMPLETELY MIXED ACTIVATED SLUDGE PROCESS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 12 A new simple empirical model is proposed to describe the waste sludge volumetric flow rate in the steady-state completely mixed activated sludge process. The model is derived based on the nonlinear regression analysis by using the Richardson’s extrapolation method and the Levenberg–Marquardt algorithm. The application of the model has been explored for a wide range of eleven fundamental biological design variables and tested against a total of 1500 additional computational scenarios ... Autori: Kaan Yetilmezsoy ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27202
RESPONSE SURFACE METHODOLOGY (RSM) BASED OPTIMIZATION OF BIODIESEL-DIESEL BLENDS AND INVESTIGATION OF THEIR EFFECTS ON DIESEL ENGINE OPERATING CONDITIONS AND EMISSION CHARACTERISTICS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 12 In this study, Response Surface Methodology (RSM) was applied to investigate both the effects of biodiesel percentage in fuel mixture and engine operating parameters (engine load and engine speed) on emission characteristics (unburned hydrocarbons (HC), CO and NOx) of a diesel engine. The optimization of biodiesel percentage in fuel mixture and engine operating parameters also was performed using the desirability approach of the response surface methodology for lower emission characteristics. Th... Autori: Alireza Shirneshan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27217
REMOVAL OF TURBIDITY AND HUMIC ACIDS USING CHITOSAN AS A COAGULANT AID: MODELING WITH ARTIFICIAL NEURAL NETWORK
Environmental Engineering and Management Journal › Vol. 16 › Nr. 1 In the present study, the effect of chitosan as an eco-friendly coagulant aid was investigated for removing turbidity (bentonite) and humic acid (HA) in the coagulation process. The effects of various operational parameters such as initial pH of the solution (4-9), dosage of chitosan (1-4.5 mg/L), dosage of alum (10-40 mg/L) and initial turbidity (10-150 NTU) were investigated. An artificial neural network (ANN) model was used to predict the performance of turbidity removal efficiencies by coagu... Autori: Abdolmotaleb Seid Mohammadi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27223
MICROWAVE ENHANCED BIODEGRADABILITY OF MEAT PROCESSING WASTEWATER SLUDGE
Environmental Engineering and Management Journal › Vol. 16 › Nr. 1 Studies about microwave (MW) sludge conditioning method have dealt mainly with municipal secondary sludge processing. We considered necessary to examine the applicability of the microwave process for other type of sludge, such as primary sludge originating from the food industry. The aim of our work is to identify the main influential operating parameters of MW pre-treatments applied for primary meat processing wastewater sludge (MPWS) as a conditioning process, followed by their optimization fo... Autori: Sándor Beszédes ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27236
AN ENHANCED ENVIRONMENTAL MULTIMEDIA MODELLING SYSTEM (FEMMS): PART I – DEVELOPMENT AND MODEL VERIFICATION
Environmental Engineering and Management Journal › Vol. 16 › Nr. 2 Public awareness and concern with impacts of pollution on multimedia environment have been greatly increased in the last few decades. There are growing needs for creating remediation strategy and setting effective standard and regulations to reduce pollutant levels in the environment. To satisfy such need, tools that can provide comprehensive understanding and characterize the behavior of chemical in the environment are required for environmental risk assessment and management. A new integrated ... Autori: Zhi Chen ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27251
MODELING EQUILIBRIUM DATA FOR Cd (II) ADSORPTION BY PEAT USING NON-LINEAR REGRESSION ANALYSIS
Environmental Engineering and Management Journal › Vol. 16 › Nr. 3 The Romanian peat was used as low-cost adsorbent to remove Cd(II) ions from aqueous solutions. The cadmium adsorption capacity of the peat was studied as a function of the solution pH (3-5.5) and temperature (293 – 333 K). Adsorption capacity was found to increase with the pH increasing and temperature decreasing and attained a maximum value of 27.9 mg/g at pH = 5±0.1 (acetate buffer) and 293 K. In addition, various thermodynamic parameters such as free energy change (ΔG0), en... Autori: Catalin Balan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27276
INCREASING ENERGY AND ECONOMIC EFFICIENCY AND DECREASING ENVIRONMENTAL IMPACTS IN AN ICE CREAM COMPANY
Environmental Engineering and Management Journal › Vol. 16 › Nr. 5 There are industrial processes where cold and heat are used. In such a process, a heat pump integrated into a refrigeration system lead to energy savings. This paper analyzes two-stage compression refrigeration combined with a compression heat pump. A case study is made based on a proposed mathematical model and on the measurements performed in an ice cream company. Three operation regimes are simulated for different hot water temperatures obtained from the heat pump. The energetic efficiency, e... Autori: Aneta Hazi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27297
GROUNDWATER QUALITY IN THE PROXIMITY OF A POLLUTED LAKE: A JOINT EXPERIMENTAL-MODELING STUDY
Environmental Engineering and Management Journal › Vol. 16 › Nr. 5 Ground water is an important source of clean water supply throughout the world. A growing literature on the management of groundwater which takes into account the interaction of groundwater with surface water resupply sources (e.g., streams or lakes) is driven by concerns of intensified global fresh-water use coupled with increasing industrial and agricultural pollution levels. Our joint laboratory and numerical experiments simulate water withdrawals via two pumping wells from an unconfined aqui... Autori: Anca Marina Marinov ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27302
BUSINESS PROCESS ANALYSIS FOR RISK MANAGEMENT IN PAV3M
Environmental Engineering and Management Journal › Vol. 16 › Nr. 4 Risk management forecasts those situations that can damage the proposed goals or jeopardize the completion of projects in time. The aim of this paper is to highlight risk management tailored practices for pavement roads maintenance projects. All presented practices and risk management analysis are consistent with international standards, processes and assets. Present work also describes a particular analysis and prioritization of risk factors for their implementation in a web application. For ri... Autori: Dan Benta ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27340
SPONTANEOUS COMBUSTION RISK ANALYSIS IN SUBSURFACE ENVIRONMENTS: CARBON MONOXIDE DATA PROCESSING TOOL
Environmental Engineering and Management Journal › Vol. 16 › Nr. 6 Early detection of spontaneous combustion processes through dedicated tools aimed at processing significant measurement data, can provide major improvement of safety levels in underground working environments. As an index of self-heating event occurrence, the increase in carbon monoxide content in hard coal collieries atmosphere became significant since the early stages of this severe phenomenon. To highlight the changes in carbon monoxide average levels, this paper synthesizes the results of re... Autori: Roland Iosif Moraru ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27359
A MATHEMATICAL MODEL FOR DETERMINING THE DIMENSIONLESS HEAT FLUX WITH APPLICATION IN MINE ENVIRONMENT
Environmental Engineering and Management Journal › Vol. 16 › Nr. 6 A major issue in the undergrounding mining is providing the thermal comfort parameters at the work sites and among those the temperature it’s the most important. Also, in calculus of underground mine ventilation, the air temperature must be taken into account. The rate of dimensionless heat flux has a major influence in the mining environment by heating or cooling the air which
flows through a mine work.
The present paper studies the complex problem of heat transfer between air and the s... Autori: Dan Codrut Petrilean ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27361
METHOD FOR IMPROVING THE MANAGEMENT OF MINE VENTILATION NETWORKS AFTER AN EXPLOSION
Environmental Engineering and Management Journal › Vol. 16 › Nr. 6 During the development of an underground explosion phenomenon, due to the energy of dynamic wave, important mechanical effects are registered both in the affected mine workings and in ventilation constructions (stoppings and seals, ventilation doors, regulators and air crossings). An explosion directly affects the ventilation network by modifying specific operational parameters
of the main fans. This creates a different natural post event repartition of the air flows, at the branch level. In or... Autori: Marius Cornel Șuvar ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27367
DEVELOPMENT OF A DECISION SUPPORT SYSTEM BASED ON STOCHASTIC NONLINEAR OPTIMIZATION FOR PETROLEUM-CONTAMINATED SITE MANAGEMENT
Environmental Engineering and Management Journal › Vol. 16 › Nr. 7 In this study, a decision support system based on a stochastic optimization model under modeling uncertainty and parameter certainty (SOMUM-DSS) is developed for petroleum-contaminated sites management. The SOMUM-DSS incorporates scenario analysis, numerical simulation, multivariate analysis, nonlinear optimization within a decision support system. It provides an effective tool for decision makers to select the optimal remediation strategy. The developed SOMUM-DSS is then applied to a petroleum-... Autori: Qi Yang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27374
EFFECT OF FUEL TREATMENTS ON CROWN FIRE BEHAVIOR IN ALEPPO PINE FORESTS OF GREECE: A SIMULATION STUDY
Environmental Engineering and Management Journal › Vol. 16 › Nr. 7 This study models the potential effect of various fuel treatments on crown fire behavior by using two crown fire simulation models in Aleppo pine (Pinus halepensis Mill.) stands. Fuel complex characteristics that influence fire behavior were measured in a representative Aleppo pine stand in northern Greece, using standard surface and canopy fuel inventory methods. Nine different
fuel treatments (control, prescribed burning, controlled grazing, thinning without slash removal, thinning with slash... Autori: Ioannis D. Mitsopoulos ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27382
MODELING OF DYE REDUCTION BY SLUDGE DIGESTION: COMBINED EFFECT OF BIOCHEMICAL AND CHEMICAL REDUCTION
Environmental Engineering and Management Journal › Vol. 16 › Nr. 7 The kinetics of azo dye reduction based on combined effect of biochemical reduction by anaerobic mixed culture and chemical reduction with hydrogen sulfide was investigated. Hydrogen sulfide was produced by sulphate reducing bacteria existing in the anaerobic mixed culture. The effect of initial anaerobic biomass, initial substrate, and initial dye (Reactive Orange 107) concentrations on reduction kinetics were studied with batch assays. The municipal waste sludge was used as electron donating s... Autori: Umay Gokce Ozkan-Yucel ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27386
Environmental engineering and Management Journal No. 7
› › Nr. 4 • EXPERIMENTAL INVESTIGATION OF TEMPERATURE EFFECTS ON THE PARAMETERS OF PHOTOVOLTAIC PANELS
• CONCENTRATIONS OF CHROMIUM, CADMIUM AND NICKEL IN TWO CONSUMED FISH SPECIES OF PERSIAN GULF, IRAN
• IMPROVING THE ENERGY EFFICIENCY OF RESIDENTIAL BUILDINGS BY USING A DRAIN WATER HEAT RECOVERY SYSTEM
• ASSESSMENT OF METAL CONTAMINATION AND ECOLOGICAL RISK IN URBAN SOILS SITUATED NEAR A METALLURGICAL COMPLEX
• FINANCIAL DE... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27398
Environmental engineering and Management Journal No. 7
› › Nr. 4 EXPERIMENTAL INVESTIGATION OF TEMPERATURE EFFECTS ON THE PARAMETERS OF PHOTOVOLTAIC PANELS
• CONCENTRATIONS OF CHROMIUM, CADMIUM AND NICKEL IN TWO CONSUMED FISH SPECIES OF PERSIAN GULF, IRAN
• IMPROVING THE ENERGY EFFICIENCY OF RESIDENTIAL BUILDINGS BY USING A DRAIN WATER HEAT RECOVERY SYSTEM
• ASSESSMENT OF METAL CONTAMINATION AND ECOLOGICAL RISK IN URBAN SOILS SITUATED NEAR A METALLURGICAL COMPLEX
• FINANCIAL DEVELOPME... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27399
3-D REAL DAM RESERVOIR MODEL FOR SEASONAL THERMAL DENSITY FLOW
Environmental Engineering and Management Journal › Vol. 16 › Nr. 9 The efficient use of fresh water sources and proper modeling of the water quality can only be possible when flows in the dam
reservoir are well defined. Therefore, in this study, a hydrodynamics model of an actual dam reservoir in three dimensions for
simulating a real dam reservoir flows for summer season is created. The model is developed using nonlinear and unsteady
continuity, momentum, energy and k-ε turbulence model equations. In order to include the Coriolis force effect on the... Autori: Fatih Üneş ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27430
APPLICATION OF ARTIFICIAL NEURAL NETWORK ON MODELING OF REACTIVE BLUE 19 REMOVAL BY MODIFIED POMEGRANATE RESIDUAL
Environmental Engineering and Management Journal › Vol. 16 › Nr. 9 The Artificial Neural Network (ANN) model was used to predict dye (Reactive Blue 19) removal efficiency from aqueous
solution using modified pomegranate residual based on 124 experimental sets. Three-layer ANN models with different neurons
numbers at a hidden layer were developed. The optimum network yielded a network error of 0.0054 and 0.9606 for mean square
error and coefficient of determination, respectively. Furthermore, sensitivity analysis of the network revealed that the adsorbent
do... Autori: Elham Radaei ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27439
USING PCA COMBINED SVM IN THE CLASSIFICATION OF EUTROPHICATION IN DEZ RESERVOIR (IRAN)
Environmental Engineering and Management Journal › Vol. 16 › Nr. 9 Eutrophication is water pollution initiated by high amounts of plant nutrients. With the excess influx of nutrients from human
activities, the eutrophication process begins and causes a breeding ground for algae. The amount of nutrients present in any given
cycle will be higher than the levels present in previous cycles. Therefore, it is very important to manage water quality in lakes
and dams to prevent and to slow or to reverse the eutrophication process. This can be ensured by using effect... Autori: Saeed Bashiri ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27442
MATHEMATICAL MODEL FOR CALCULATION OF SOIL LOSS ON WATERSHED SLOPES
Environmental Engineering and Management Journal › Vol. 16 › Nr. 10 Soil erosion by water, sediment transport, sediment deposition and their impact on watershed area are complex processes.
Therefore, the state of theoretical knowledge and mathematical modeling of them are still in an incipient phase. Most of the
existing mathematical models are based on relations obtained either experimentally or in laboratory conditions, either in situ or
physical models; because of existence of multitude factors involved in these processes and influence each other. These
m... Autori: Erika Beilicci ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27449
ENZYMATIC AND CHEMICAL DELIGNIFICATION OF KRAFT WOOD PULP: OPTIMIZATION AND SEQUENTIAL STUDIES
Environmental Engineering and Management Journal › Vol. 16 › Nr. 11 The delignification of wood pulp using hydrogen peroxide and xylanase enzyme in an ultrasonicator was studied at different
process conditions. The factors influencing the chemical delignification were studied simultaneously using the Box-Behnken
design of experiments. The mathematical model for Kappa reduction as functions of consistency of the pulp, concentration of
peroxide and the temperature of delignification was developed. The response optimization studies for minimizing the Kappa
numb... Autori: Palaniappan Ramesh ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27480
STUDY ON THE USE OF GEOTEXTILES FOR ENSURING DRAINAGE CONDITIONS WITHIN INDUSTRIAL FLY ASH PONDS
Environmental Engineering and Management Journal › Vol. 16 › Nr. 11 Fly ash ponds are dangerous for the environment because the fly ash can cause multiple harmful effects. This is cause for major concern for researchers and industry people alike. The rise of the water table level inside the ash structure may cause a loss of stability over time, with adverse effects on the environment. Therefore it is necessary to adopt efficient solutions to ensure the stability of ash ponds and rapid measures that can be applied. The use of geosynthetic materials has proven to ... Autori: Lidia Niculiţă ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27483
REMOVAL OF MULTILAN RED AND MULTI-ACTIVE BLUE DYES FROM AQUEOUS SOLUTION BY ADSORPTION AND OXIDATION TECHNIQUES: EQUILIBRIUM, KINETICS AND THERMODYNAMIC STUDIES
Environmental Engineering and Management Journal › Vol. 16 › Nr. 12 This study evaluated the performances of adsorption and Fenton oxidation for the removal of multilan red (MLR) and multi-active blue (MActB) dyes from aqueous solution. Zeolite, the adsorbent used in the study was modified using two surfactants: hexadecyltrimethylammonium bromide (HDTMA-Br) and cetyltrimethylammonium bromide (CTAB). The modified zeolite characterized using FTIR, SEM and XRD analysis. The modification studies revealed that HDTMA-modified zeolite exhibited better performance than ... Autori: Jacob Kitinya ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27505
PRO-ENVIRONMENTALISM BEHAVIOR, ORGANIZATIONAL PRESSURE, SUSTAINABLE INFORMATION TECHNOLOGY INITIATIVES AND FINANCIAL PERFORMANCE OF MALAYSIAN SERVICE FIRMS
Environmental Engineering and Management Journal › Vol. 17 › Nr. 1 Many firms are beginning to use sustainable Information Technology (IT) initiatives in their daily operations. The usage is generally associated with several factors, among them pro- environmentalism behavior and organizational pressure. Furthermore,
the usage of sustainable IT initiatives has been considered to have influenced the financial performance of firms. Hence, this paper seeks to examine the factors associated with sustainable IT usage and their impact on the financial performance of ... Autori: Noor Ismawati Jaafar ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27528
MATHEMATICAL MODEL FOR PARTICLE MOTION APPLIED ON A MANURE SPREADING APPARATUS USED IN ENVIRONMENTALLY FRIENDLY TECHNOLOGY
Environmental Engineering and Management Journal › Vol. 17 › Nr. 1 It is acknowledged that organic fertilizers and wastes, such as animal slurries/manure from intensive farm enterprise, sewage sludge, poultry litter are and will continue to be spread on agricultural land and provide beneficial nutrients to crops. However, many of these materials which are also potentially polluting if not properly managed can pose a risk to groundwater and surface
water quality. Generally, their distribution on the soil is performed with specialized machines to reduce the risk... Autori: Vasilica Ştefan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27545
OPTIMIZATION OF INCENTIVE CONTRACTS LEADING ENTERPRISES TO PARTICIPATE IN LOW-CARBON AGRICULTURAL DEVELOPMENT
Environmental Engineering and Management Journal › Vol. 17 › Nr. 1 Based on principal-agent model, this paper tries to solve the asymmetric information problem between the investor and agriculture leading enterprises. A mathematical model of the incentive contract is designed, on the basis of which it is investigated the design of the incentive contract under different risk preference, the change of the income when implementing the
incentive contract and the changing trends of the contractors’ costs when an observable variable is included in the incentiv... Autori: Xitai Sheng ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27547
MATHEMATICAL MODELLING FOR PHENOLATION OF SPENT SULFITE LIQUOR
Environmental Engineering and Management Journal › Vol. 17 › Nr. 4 In this study major factors affecting the phenolation process of lignosulfonate (LS) waste liquor (recovered from pulp and paper industry) were optimized in order to improve LS substitution for replacing petroleum-based phenols during phenolic resin manufacturing. Four different parameters, namely phenol/lignosulfonate ratio, time, temperature and lignosulfonate waste liquor concentration, were varied in an experimental program having as response function the reaction yield. Response Surface Met... Autori: Andrei Ionuţ Simion ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27551
EFFECTIVENESS FACTOR APPROACH FOR CHEMICAL ABSORPTION PROCESS
Environmental Engineering and Management Journal › Vol. 17 › Nr. 4 Absorption of gases into liquids, with chemical reaction, is an important unit operation useful in many fields, especially synthesis of new products and waste gas treatment. Gas treatment means the separation of pollutants: acid gases, organic sulphur compounds, and other contaminants which may be found in gaseous streams. The absorption into liquid is a process almost exclusively used for removal of contaminants. The removal refers to retention of the majority of acid gases present in high conc... Autori: Maria Harja ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27555
MASS TRANSFER IN SOLID-LIQUID EXTRACTION AT HIGH SOLUTE CONCENTRATIONS
Environmental Engineering and Management Journal › Vol. 17 › Nr. 4 The solid-liquid extraction process and some of its influencing factors such as solid-liquid ratio, temperature and salt initial amount have been investigated. Also, mathematical modeling for mass transfer coefficients calculation was applied.
An inert porous solid material (coal), impregnated with 10% and 20% mass NaCl or 15% and 30% mass CaCl2, was used. The leaching was conducted in a fixed bed column, in laminar flow. The CaCl2 impregnated samples were investigated in a column with a height... Autori: Marcel Popa ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27557
AN ENHANCED ENVIRONMENTAL MULTIMEDIA MODELLING SYSTEM (FEMMS): PART II – USER INTERFACE AND FIELD VALIDATION
Environmental Engineering and Management Journal › Vol. 17 › Nr. 4 Environmental quantitative risk assessment requires the development of multimedia modeling tools to address dynamic site conditions at field scale. This work is the second part in a two-part series. A new fuzzy-set enhanced environmental multimedia modeling system (FEMMS) has been presented in Part I. Environmental multimedia modeling often involves a sizeable amount of parameters and data. The challenges have been the difficulties to quantify the uncertainties and to manage the data and main mo... Autori: Zhi Chen ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27573
Environmental engineering and Management Journal No. 4
› Vol. 1 › Nr. 11 • Environmental engineering and Management Journal No. 4
• AN ENHANCED ENVIRONMENTAL MULTIMEDIA MODELLING SYSTEM (FEMMS): PART II USER INTERFACE AND FIELD VALIDATION
• COST-EFFECTIVENESS OF OPTIMIZING CONCENTRATED FEED BLENDS TO DECREASE GREENHOUSE GAS EMISSIONS
• FATE AND BIODEGRADATION OF ESTROGENS IN THE ENVIRONMENT AND ENGINEERING SYSTEMS A REVIEW
• ANALYSIS OF THE MATERIAL COMPOSITION OF MIXED MUN... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27577
Environmental engineering and Management Journal No. 4
Environmental Engineering and Management Journal › Vol. 17 › Nr. 4 • Environmental engineering and Management Journal No. 4
• AN ENHANCED ENVIRONMENTAL MULTIMEDIA MODELLING SYSTEM (FEMMS): PART II USER INTERFACE AND FIELD VALIDATION
• COST-EFFECTIVENESS OF OPTIMIZING CONCENTRATED FEED BLENDS TO DECREASE GREENHOUSE GAS EMISSIONS
• FATE AND BIODEGRADATION OF ESTROGENS IN THE ENVIRONMENT AND ENGINEERING SYSTEMS A REVIEW
• ANALYSIS OF THE MATERIAL COMPOSITION OF MIXED MUN... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27576
ECO-EFFICIENT DECISION SUPPORT MODEL OF SOLID WASTE RECYCLING
Environmental Engineering and Management Journal › Vol. 17 › Nr. 5 This paper describes an eco-efficiency decision support model for of end-of-life solid waste recycling. A holistic approach in balancing environmental pollution concern and waste recycling is required. A system dynamic model is based on mathematical model of the supply chain, and decision-making analysis is supported with the online spreadsheets. A criterion function-based modelling is used as a core model for simulation that uses net present value-based metrics of the supply chain activities. T... Autori: Stanislav Avsec ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27591
FLY ASH CONCRETE WITH FIBERS: COMPARISON OF TENSILE STRENGTH USING NEURAL NETWORK AND DESIGN OF EXPERIMENTS METHODS
Environmental Engineering and Management Journal › Vol. 17 › Nr. 6 Neural networks are a series of simple mathematical models, created on the architecture of human brain which gives a superior capacity of learning based on numerous connections established among neurons. The artificial neural networks have strong units of processing which are characterized by an extreme simplicity, but because of their whole interaction, the results are complex. The paper presents the comparison of two methods: mathematical regression and artificial neural network, used for pred... Autori: Daniel Lepadatu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27608
AN IMPROVED MODELING FOR PREDICTION OF PM2.5 COLLECTION EFFICIENCY IN ELECTROSTATIC PRECIPITATORS
Environmental Engineering and Management Journal › Vol. 17 › Nr. 3 In this work, PM2.5 removal mechanism was explored to investigate PM2.5 collection efficiency under the influences of applied
magnetic field and diffusion charging (the main charging mode for submicron particle). The proposed electrostatic precipitators
(ESPs) mathematical model considered three-field interaction between fluid field, electromagnetic field and particle dynamic field.
CFD software FLUENT was used to generate the simplified solid structure of the ESP. In numerical calculation, t... Autori: Jian-Ping Zhang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27667
MEMBRANE WETTING IN CARBON DIOXIDE ABSORPTION PROCESS USING MEMBRANE CONTACTORS: A REVIEW
Environmental Engineering and Management Journal › Vol. 17 › Nr. 3 Porous membranes as gas-liquid contactors are widely used in carbon dioxide (CO2) absorption systems. It provides larger mass
transfer area and excellent operational flexibility. Membrane contactors have been considered as alternative to conventional
approaches in removing CO2. In spite of its advantages over conventional technologies, membrane wetting is a major problem
which reduces performance of CO2 absorption. This paper explains the concept of membrane wetting phenomenon and its influen... Autori: Abdul Latif Ahmad ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27676
INDIRECT ENVIRONMENT-RELATED EFFECTS OF ELECTRIC CAR VEHICLES USE
Environmental Engineering and Management Journal › Vol. 17 › Nr. 7 The article presents a study on indirect environment-related effects of electric car vehicles use. Although electric vehicles are considered zero emission vehicles, their use may be linked to indirect pollution of environment caused by energy sources used for electricity production and also other sources of pollution such as poor recycling procedures. A computer simulation was performed to determine the energy consumption of electric vehicles available on the Romanian car market. The values obta... Autori: Bogdan Ovidiu Varga ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27686
CURRENT TRENDS IN SOLID WASTE MANAGEMENT IN HIGHER EDUCATION INSTITUTIONS. THE CASE OF WEST BANK REGION, PALESTINE
Environmental Engineering and Management Journal › Vol. 17 › Nr. 8 Higher Education Institutions in Palestine are considered to have one of the main contributors to solid waste generation according
to local authorities’ annual reporting. Besides being major players in the education field, they are presented with the opportunity
of being also key players in the promotion of waste minimization and awareness raising towards solid waste management strategies.
In the present paper the results of an extended field research in the Palestinian Higher Education... Autori: Issam A. Al-Khatib ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27769
EXPLORING THE POTENTIAL OF EO DATA AND GIS FOR ECOSYSTEM HEALTH MODELING IN RESPONSE TO WILDFIRE: A CASE STUDY IN CENTRAL GREECE
Environmental Engineering and Management Journal › Vol. 17 › Nr. 9 In this study, the development of a suitable methodology for establishing and monitoring indicators of Ecosystem Health (EH) and its responses to wildfire using Earth Observation (EO) data synergistically with Geographical Information Systems (GIS) is investigated. The proposed methodology combined GIS and Landsat Thematic Mapper (TM) and Enhanced Thematic Mapper Plus (ETM+) data to assess ecosystem characteristics, including its vigor, organization and resilience, for a case study in Central Gr... Autori: Aaron Evans ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27745
EVALUATION OF HUMAN HEALTH RISKS ASSOCIATED WITH PESTICIDE DIETARY INTAKE - AN OVERVIEW ON QUANTITATIVE UNCERTAINTY ANALYSIS
Environmental Engineering and Management Journal › Vol. 17 › Nr. 9 The probabilistic estimation and the risk analysis of the exposure to pesticides through the ingestion of plants and food products is an important task for ensuring informed decision making and appropriate consumer protection. Monte Carlo-based methods are powerful tools in this regard, allowing for the empirical estimation of the distribution of exposure values, as well as for carrying out a corresponding uncertainty analysis. Such findings are important for assessing the exposure risk for mult... Autori: Petronela Cozma ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27754
ASSESSMENT OF KINETICS, EQUILIBRIUM AND THERMODYNAMICS OF BLACK KROM KJR DYE ADSORPTION ONTO AQUATIC MACROPHYTE Pistia stratiote
Environmental Engineering and Management Journal › Vol. 17 › Nr. 11 The macrophyte Pistia stratiote was used as biosorbent for the removal of Black Krom KJR (BK-KJR) dye in synthetic aqueous
solution. Initially, some tests were performed to verify the best operational conditions such as pH, biosorbent particle size, sorption
temperature and stirring speed, which were later used in the kinetic and equilibrium tests. All tests were performed in duplicate. The
highest removal rates of the pollutant were achieved at the process conditions of initial pH 2, granulo... Autori: Aparecido Nivaldo Módenes ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27843
HYDROLOGICAL MODELING OF ARSENIC IN THE DANUBE DELTA
Environmental Engineering and Management Journal › Vol. 18 › Nr. 1 The Danube River forms one of the largest and most complex deltas at the Black Sea, being a Biosphere Reserve, UNESCO World
Heritage and Ramsar site. This study assesses the spatial variability of arsenic contamination of the water in the Danube Delta.
Water samples were collected during all seasons in 2013 from the south-east of the Danube Delta and analyzed through HG-AAS
method for arsenic. Data were handled using two different approaches. First, a complex hydrological model was compiled, ... Autori: Gabriel Gati ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27884
LANDFILL GAS TO ENERGY CONVERSION FROM ORADEA MUNICIPAL WASTE LANDFILL IN ROMANIA
Environmental Engineering and Management Journal › Vol. 18 › Nr. 2 This paper presents the results of theoretical estimations of the quantity of landfill gas (LFG), as well as the energy potential of
Cell A from the municipal landfill in Oradea city, Romania, based on a mathematical model. Considering three scenarios for LFG
recovery according to the capture system efficiency, the following LFG theoretical flows have been obtained: 157 m3LFG/h for 45%
recovery efficiency; 209 m3LFG/h for 60% recovery efficiency; and 297 for 85% recovery efficiency, respectiv... Autori: Gerardo Collaguazo ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27903
PERSONAL VALUES, PERCEIVED CONSUMER EFFECTIVENESS AND DEMOGRAPHIC EFFECTS ON GREEN PURCHASING BEHAVIOR OF KOREAN CONSUMERS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 2 This study is an examination of personal values, perceived consumer effectiveness (PCE), and demographic factors for their
influence on Korean consumers’ green purchasing behavior. A survey conducted in Seoul, Korea, meaningfully supports the
proposed relationships between value orientations, PCE, education level, and green purchasing behavior. Specifically, structuralequation
modeling confirms that egoism directly and negatively influences green purchases, and that PCE moderates the in... Autori: Yong-Ki Lee ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27906
SEASONAL VARIATION OF PHYSICO-CHEMICAL PARAMETERS IN THE DRINKING WATER SUPPLY NETWORK OF SATU MARE CITY, NW ROMANIA
Environmental Engineering and Management Journal › Vol. 18 › Nr. 3 We assessed the variability of the main physico-chemical parameters of drinking water: oxidability, turbidity, conductivity, water
hardness, free chlorine concentration, chlorides and nitrates across the four seasons (Spring, Summer, Autumn of 2013 and Winter
of 2014). We collected data from several points in the supply network of Satu Mare city, NW of Romania, where the source of
drinking water is groundwater.
The results revealed significant higher average values in spring for some of the ... Autori: Thomas Dippong ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27928
NEW TOOLS FOR ESTIMATING THE EXTENT OF HAZARDOUS AREAS GENERATED BY GAS LEAK EXPLOSIONS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 4 The current paper is an overview on previous and ongoing research carried out by the authors concerning the use of Computational
Fluid Dynamics for the accurate classification of hazardous Ex areas generated by flammable gases, for the optimization of
computational simulation of air-methane mixture explosions by using ANSYS CFX and FLUENT and for calibrating computational
simulations of gas explosions using the Schlieren effect. These research works containing analytic studies have led to the... Autori: Vlad Mihai Păsculescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27962
RESEARCH ON AQUATIC POLLUTION LEVEL OF MALEIA RIVER BY SIMULATION IN COMPUTATIONAL FLUID DYNAMICS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 4 Watercourses that transit rural / urban areas are susceptible to the phenomenon of aquatic pollution due to various types of polluting
species. The important issues of river pollution and of polluting species dispersion, require an approach with predictive tools (models
for transport of polluting species) which can evaluate the performance of depollution measures/actions to reduce pollution and to
take optimal management decisions. Thus, from January 2017 to May 2017, a monitoring investigati... Autori: Lorand Toth ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27967
LAB SIMULATION SYSTEM FOR CRITICAL SITUATIONS OBSERVED WITH THERMOVISION EQUIPMENT
Environmental Engineering and Management Journal › Vol. 18 › Nr. 5 The paper presents an experimental system enabling a laboratory simulation of several types of critical situations and aggravating
circumstances (sources of smoke, fog, rain, heat) using a thermovision equipment. The critical situations taken into consideration
are those caused by human negligence or natural disasters such as earthquakes. Aggravating circumstances are those considered as
being limit. The proposed thermovision equipment with appropriate accessories must highlight and determine... Autori: Catalin Spulber ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27997
EFFECTS OF ENVIRONMENTAL FACTORS ON THE BIOMASS OF BENTHIC DIATOM IN RIVERS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 5 This paper aims to disclose the quantitative relationship between benthic diatom biomass in natural rivers and environmental factors.
For this purpose, the author selected seven natural rivers in the basin of Minjiang River as the objects. First, the samples of benthic
diatoms and the environmental factors were collected from 14 different sampling sites of five rivers and the diatom density and
Chlorophyll a (Chl a) content were selected to characterize the diatom biomass. Then, the number of... Autori: Baichuan Zhang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28001
DAIRY WASTEWATER TREATMENT IN CONTINUOUS STIRRED TANK ELECTROCHEMICAL REACTOR (CSTER): PARAMETRIC OPTIMIZATION AND KINETICS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 6 Dairy wastewater has been a major environmental concern because of massive effluents characterized by high pollution load. This
study reports the influence of initial pH (pHi), residence time (τ) and elapsed time (t) on the %COD removal (Y1) and specific energy
consumed (kWh per kg of COD removed, Y2) for real dairy industry wastewater treatment in continuous stirred tank electrochemical
reactor (CSTER) using aluminum electrodes. Central composite design (CCD) was applied for designing th... Autori: Poonam Kumari ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28011
ESTIMATING THE POTENTIAL EVAPOTRANSPIRATION (PET) USING SATELLITE IMAGERY IN ARID LANDS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 9 Evapotranspiration is one of the main sources of water loss in arid regions. Although FAO Penman-Monteith (FAO-PM) method is one of the accurate method to estimate potential evapotranspiration (PET). Nevertheless, it is a point-based method and requires several weather data such as radiation, wind speed, air humidity and temperature, which is not available in all regions. Therefore, this study is aimed to estimate PET equivalent to FAO-PM model using satellite data and Priestly-Taylor (PT) model... Autori: Azam Sadat Hosseini ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28062
EVALUATION OF BIOMETHANE YIELDS FROM HIGH-ENERGY ORGANIC WASTE AND SEWAGE SLUDGE: A PILOT STUDY FOR A WASTEWATER TREATMENT PLANT
Environmental Engineering and Management Journal › Vol. 18 › Nr. 9 The article describes a pilot study on a wastewater treatment plant operating a biogas plant (2.793 MW). The authors of the
experiment used organic waste material, including: chicken fat with feathers (FF), molasses (M), glycerol (GL), raw sewage sludge
(SS) and digested sewage sludge as an inoculum. The parameters of raw and digested sludge were compared, e.g. changes in the
concentrations of ammonium nitrogen (N-NH4+), alkalinities, chemical oxygen demand (COD) and light metal ions. Potenti... Autori: Agnieszka A. Pilarska ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28064
CORRELATION BETWEEN AERATION AND ERGOSTEROL PRODUCTION BY YEASTS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 12 The present study represents an extension of ergosterol production by Saccharomyces cerevisiae fermentation processes using oxygen-vector by establishing the influence of the analyzed main factors, such as aeration efficiency and hydrocarbon concentration. The study has been developed for batch and fed-batch fermentation systems and has been focused on the variation of ergosterol content inside the yeast cells during the fermentation cycle in correlation with hydrocarbon volumetric fraction, COV... Autori: Corina Ciobanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28130
ASSESSMENT OF GHG EMISSIONS IN EUROPE: FUTURE ESTIMATES AND POLICY IMPLICATIONS
Environmental Engineering and Management Journal › Vol. 19 › Nr. 1 Greenhouse gas (GHG) emissions represents a global challenge and a quantitative approach is a support for decision makers. The aim of this paper is to estimate future values of GHG emissions in Europe, considering different periods of reference and through two common mathematical parameters (average annual growth rate (AAGR) and compound annual growth rate (CAGR)).
Results analysis show that a reduction of GHG emissions can be reached. However, some Member States (MSs) as Ireland and Netherland... Autori: Federica Cucchiella ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28144
MODELING OF A RECTANGULAR CHANNEL MONOLITH REACTOR FOR SORPTION-ENHANCED WATER-GAS SHIFT
Environmental Engineering and Management Journal › Vol. 19 › Nr. 2 As CO2 concentration levels in the atmosphere are steadily reaching a point of no return, it is paramount that actions are taken towards mitigating emissions by improving the efficiency of existing processes. Sorption-enhanced water-gas shift (SEWGS) combines the water-gas shift reaction with in-situ adsorption of CO2 on potassium-promoted hydrotalcite (K-HTC). This enables a
direct conversion of syngas into separate hot streams of H2 at feed pressure and CO2 at regeneration pressure, making th... Autori: Vlad-Cristian Sandu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28149
FIXED-BED-COLUMN STUDIES FOR METHYLENE BLUE REMOVAL BY CELLULOSE CELLETS
Environmental Engineering and Management Journal › Vol. 19 › Nr. 2 The Cellets product represents a cellulose material, which combines different properties such as the perfect sphericity, fine particle size distribution, low friability and solubility, and inertness. The experiments were carried out with Cellets 200 granulated celluloses used as a filling material for a laboratory glass column, using diluted dye solution (9-10 mg of dye /L of solution) at adequate initial pH (4.7). The effect of flow rate was investigated, and the modeling of experimental data f... Autori: Iulia Nica ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28155
THERMODYNAMIC ANALYSIS OF HEAVY METALS PRECIPITATION FOR THEIR RECOVERY FROM INDUSTRIAL WASTEWATERS
Environmental Engineering and Management Journal › Vol. 19 › Nr. 2 This work seeks to develop a suitable heavy metals precipitation modeling approach that could give reasonable results in mainstream use with industrial wastewater treatment. This paper is devoted to the thermodynamic analysis of the degree of precipitation of slightly soluble hydroxides and salts in industrial wastewaters in order to optimize the technological schemes of extraction and reuse
of heavy metals from industrial waste. Based on the notion of the solubility product, the equations desc... Autori: Igor Povar ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28156
OLEFINS AND FUELS FROM FRYING PALM OIL THROUGH PYROLYSIS
Environmental Engineering and Management Journal › Vol. 19 › Nr. 2 The pyrolysis of frying palm oil was studied in continuous stationary process, in a micropilot plant. The main factors affecting the products yields are temperature and residence time. For the studied parameters range (temperature: 475oC - 630oC and residence time: 120 s- 240 s), the gas yield varied between 7.9% (w/w) and 63.3% (w/w), related to feed. Unsaturated hydrocarbon yields (olefins) can reach 24-29% (w/w) related to feed, at the right processing parameters, the main products having goo... Autori: Ana Maria Sivriu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28162
AIR POLLUTION BY HEAVY METALS FROM PETROCHEMICAL INCINERATORS: MEASUREMENT AND DISPERSION MODELLING
Environmental Engineering and Management Journal › Vol. 19 › Nr. 3 Distribution of solid particles in the atmosphere around the pollution sources has an important role in decision making to oppose with air pollutants. This study reports the concentration and distribution of 11 heavy metals including Cu, Co, Ni, Cd, V, Ti, Mo, Cr, Pb, As, and Hg emitted from 6 incinerators (A to F) with various feeds and operating conditions to determine the extent of exposure for industrial and residential areas. These incinerators located at Petrochemical Special Economic Zone... Autori: Akbar Pirbadali-Somarin ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28166
OPTIMAL DESIGN OF CASCADE SPILLWAY USING META-HEURISTIC ALGORITHMS: COMPARISON OF FOUR DIFFERENT ALGORITHMS
Environmental Engineering and Management Journal › Vol. 19 › Nr. 4 In the present research, four meta-heuristic algorithms named Genetic Algorithm (GA), Gravitational Search Algorithm (GSA),
Particle Swarm Optimization (PSO), and Artificial Bee Colony (ABC) have been used for optimal design of cascade spillway to
minimize the construction cost. Usually, the traditional design methods such as Vittal and Porey (VP) method or experimental
modeling are used to solve this problem leading to infeasible or near optimal solution. The main novelty of this paper is to... Autori: Pedram Jazayeri ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28195
ANALYSIS OF KNOWLEDGE SOURCES IN STANDARDIZED ENVIRONMENT-RELATED FIELDS USING ORIGINAL SOFTWARE APPLICATION
Environmental Engineering and Management Journal › Vol. 19 › Nr. 5 Within the International Classification of Standards (ICS), the field of Environment, Health Protection and Safety is classified as ICS1 = 13, i.e. ranking 13th among 40 fields at the 1st classification level. The field includes 21 subfields at the second classification level (ICS2). This research aimed to analyze the intensity of innovations in 5 of those second-level subfields (environmental protection, wastes, air quality, water quality and soil quality). The chosen fields cover the broadest ... Autori: Marija Blagojević ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28214
BUILDING INFORMATION MODELING APPLICATION FOR GROUNDWATER RECHARGE: DEVELOPMENT OF MULTIPLE STRUCTURES
Environmental Engineering and Management Journal › Vol. 19 › Nr. 6 Globally the researchers are identifying the new ways for better urban sustainability. One major issue in the current world is the lack of fresh water availability in cities due to rapid increase in the population. To meet water requirement, scientist are exploring different ways to enhance the groundwater recharge capacity. One such solution is the use of building information modelling (BIM)
technology to identify multiple structures that can be constructed to provide the potential recharge. T... Autori: Ahsen Maqsoom ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28218
FORECASTING OF CHLOROPHENOLS REMOVING WITH ADVANCED OXIDATION PROCESSES: AN ARTIFICIAL NEURAL NETWORKS APPLICATION
Environmental Engineering and Management Journal › Vol. 19 › Nr. 8 Advanced oxidation processes (AOPs) are used with high efficiency in wastewater treatment due to the formation of hydroxyl radicals with high oxidation capacity. However, there exists many different variables which affect the efficiency of theses processes as it affects the amount of hydroxyl radicals formed; such as reaction time, pH, temperature, reactant concentrations and catalyst amount. In this study, the removal of 2-chlorophenol (2-CP) and 2,4-dichlorophenol (2,4-DCP), which are highly t... Autori: Aysun Altikat ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28251
INFLUENCE OF SOLAR ACTIVITIES ON CLIMATE CHANGE
Environmental Engineering and Management Journal › Vol. 19 › Nr. 8 The solar energy received by the atmosphere of the Earth is universally distributed, which constitutes the atmospheric dynamics.
The changes observed in the climate of the Earth are due to solar output variations. Some detailed reviews have accounted for the
influence of solar activities on the climate using sunspot number derived from peak Sun hours, but has gaps in analyzing critical
statistical background information, seasonal, latitudinal and solar activity year validation. A number of st... Autori: Chukwuma Moses Anoruo ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28260
FULL-SCALE APPLICATION OF MABR TECHNOLOGY FOR UPGRADING AND RETROFITTING AN EXISTING WWTP: PERFORMANCES AND PROCESS MODELLING
Environmental Engineering and Management Journal › Vol. 19 › Nr. 10 MABR (Membrane Aerated Biofilm Reactor) consists in an attached-growth process in which a gas permeable membrane is used as a biofilm carrier, and bubble-less oxygen transfer allows for a counter-diffusional mechanism where the electron donor (NH4+,
biodegradable organics) and electron acceptor (O2) reach the biofilm from opposing sides. The paper reports results form the largest MABR installation in the world, demonstrating the beneficial impact of the technology in terms of improved process r... Autori: Giuseppe Guglielmi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28299
DESIGNING A LOGISTIC NETWORK FOR HOSPITAL WASTE MANAGEMENT: A BENDERS DECOMPOSITION ALGORITHM
Environmental Engineering and Management Journal › Vol. 19 › Nr. 11 Healthcare wastes are produced from all medical and therapeutic activities in hospitals and healthcare centres. Around 15-20% of these wastes are classified as infectious wastes that could be hazardous. Therefore, an effective approach is required for handling costs and environmental issues. In this paper, a bi-objective Mixed-Integer Linear Programming (MILP) model is presented for logistics of infectious and non-infectious wastes. The proposed bi-objective model aims to minimize network costs ... Autori: Mohammad Nikzamir ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28314
MODELING OF IN-SEASON WINTER WHEAT NITROGEN REQUIREMENTS USING PLANT REFLECTION INDICES
Environmental Engineering and Management Journal › Vol. 19 › Nr. 11 A significant reduction in nitrogen (N) losses from agricultural fields will make a positive impact on the environment. Managing nitrogen for the optimum application provides economic benefits as well as environmental protection. This study presents a model
that was developed to determine the optimum ratio of N to yield based on N sensor indices in winter wheat. A quadratic polynomial model was used to characterize the relationship between N and yield for the optimum N rate. The N was applied t... Autori: UÄźur YegĂĽl ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28317
THERMAL COMFORT AND VENTILATION CONDITIONS IN HEALTHCARE FACILITIES - PART 2: IMPROVING INDOOR ENVIRONMENT QUALITY (IEQ) THROUGH VENTILATION RETROFITTING
Environmental Engineering and Management Journal › Vol. 19 › Nr. 11 The basic purpose of a hospital is to provide a cure to the ailing patients. Since the patients are already suffering from ailments, the hospital must be a place for comfort and mental peace. Indoor Environmental Quality plays a vital role in maintaining that comfort.
The hospital building must be designed on the standards to provide the required thermal comfort. If the building is already built and operational, retrofitting techniques are used to maintain the standard values of indoor environm... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28325
APPRAISAL OF HEAVY METAL CONTAMINATION IN ROAD DUST AND HUMAN HEALTH RISK IN A MUNICIPALITY OF BANGLADESH
Environmental Engineering and Management Journal › Vol. 19 › Nr. 12 Road dust from atmospheric deposition is considered as one of the significant environmental pollutants for containing toxic heavy metals. In this connection, to explore the present scenario of urban contamination and potential health risk of heavy metals present in road dust; this study was carried out in Tangail Municipality Area of Bangladesh. Road dust samples were collected seasonally from five different sampling sites encompassing different traffic homogeneity. Collected samples were proces... Autori: Mir Talas Mahammad Diganta ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28334
EVALUATION OF THE EFFECT OF ENVIRONMENTAL FACTORS ON WILDLIFE ROADKILL IN CENTRAL TURKEY
Environmental Engineering and Management Journal › Vol. 19 › Nr. 12 Transport networks, including highways, have many negative ecological impacts, such as habitat loss and landscape fragmentation. One of the most consicuous negative effects is wildlife vehicle collision (WVC). The basic aims of this study, conducted on the
Kırıkkale-Çankırı Highway, Turkey, are the following: i) identifying locations of WVC events, ii) modeling the effects of landscape pattern and traffic characteristics on WVC and iii) proposing a solution to mitigate WVC. In the st... Autori: Ali UÄźur Ă–zcan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28337
APPLICATION OF THE AGRO-HYDROLOGIC SWAT MODEL ON THE TAABO RIVER BASIN (CÔTE D’IVOIRE) TO EVALUATE THE EFFECT OF THREE VEGETATIVE FILTER STRIP SCENARIOS ON STREAMFLOW AND NUTRIENTS
Environmental Engineering and Management Journal › Vol. 20 › Nr. 1 Côte d'Ivoire is one of the world's leading producers and exporters of agricultural products. Unfortunately, the multiplicity of stakeholders in this sector and the absence of legislation and regulations have contributed to the pollution of the various hydro systems, particularly those of Taabo river basin. The purpose of this study was to assess the ability of the Soil and Water Assessment Tool (SWAT) model to test the applicability of three vegetative filter strips scenarios to m... Autori: Kouao Armand Anoh ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28346
REDUCTION OF OBNOXIOUS Cr(VI) FROM ELECTROPLATING EFFLUENTS BY HYDRAZINE: KINETIC OPTIMIZATION AND MECHANISTIC MODELING FOR WASTEWATER TREATMENT
Environmental Engineering and Management Journal › Vol. 20 › Nr. 1 The simple way to deal with obnoxious hexavalent chromium is to reduce it to its trivalent form, which is comparatively less toxic. In this article, Cr(VI) was reduced to Cr(III) using hydrazine. The effect of various process parameters such as molar ratios of Cr(VI)
to N2H4, the temperature of the reaction, and the environmental chemistry of solution on the reduction kinetics have been evaluated. Experiments demonstrate an order of three for the reaction. The reaction was first order with resp... Autori: Bharti Verma ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28348 |