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Rezultatele pentru biodegradabilityRezultate gasite: 25
Equilibrium and kinetic studies of copper (ii) removal on Purolite S930 resin
Environmental Engineering and Management Journal › Vol. 8 › Nr. 5 Abstract
The presence of heavy metals in the environment is a major concern due to their non-biodegradability, bioaccumulation tendency, persistence in nature and toxicity to many life forms. Different treatment techniques for wastewater laden with copper have been developed in recent years to decrease the amount of wastewater produced and to improve the quality of the treated effluent. All techniques have their advantages and limitations in application. One of the most used techniques to rem... Autori: Petru Bulai, Catalin Balan, Camelia Scripcariu, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25531
Studies regarding advanced processes used for reactive dyes removal from textile effluents
Environmental Engineering and Management Journal › Vol. 8 › Nr. 5 Abstract
In the textile finishing and dyeing industries, the total volume of water consumed is around 150 millions tons/year, and thus very large quantities of water are processed and produced as wastewater by textile plants. Quality indicators of textile wastewaters, like BOD and COD, have values which, in some cases, exceed 5 times the maximum concentration value (allowed by the national quality standards). One of the greatest concerns in wastewater treatment of a textile effluent is the co... Autori: Daniela Cailean, , Florin Brinza ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25538
PARAMETERS EFFECT ON THE PRODUCT DISTRIBUTION IN THE BIOMASS TO FISCHER-TROPSCH FUELS PROCESS
Environmental Engineering and Management Journal › Vol. 10 › Nr. 9 Abstract:The increasing of energy consumption and fossil fuel emissions (especially CO2, SO2 and NOx) and the limitation of crude oilreserves, determined a growing trend toward renewable energy technologies, like solar, wind, geo-thermal energy and biomass forbiofuels.From all the renewable energies sources, biomass attracts more and more interest being a renewable resource with economicpotential, which can be found all over the world, with positive environmental properties due to neutral emissi... Autori: Anca Sauciuc, Angela Potetz, Georg Schlaub, Gerald Weber, Hermann Hofbauer, Lucia Dumitrescu, Reinhard Rauch, Ziad Abosteif ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25762
STUDIES ON THE BIOLOGICAL TREATMENT OF INDUSTRIAL WASTEWATER STREAMS
Environmental Engineering and Management Journal › Vol. 11 › Nr. 2 Two experimental periods have been undertaken to investigate the biodegradability of sewage streams (mainly regarding the organic substances) produced by a gas cartridge production, filling and distribution company. A sequencing batch reactor (SBR) was used for the laboratory examinations launched with municipal sewage sludge with a concentration of approx. 3 g MLSS/L. The various conditions in the reactors followed each other cyclically (fill, anoxic, aerobic, settle, draw) three times a day. T... Autori: Bence Fazekas, Karoly Reich, Krisztian Varga, Viktoria Pitas, Viola Somogyi, Zsuzsanna Banyai ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25902
TREATMENT OF AN ALKALINE BUTYL RUBBER WASTEWATER BY THE PROCESS OF COAGULATION AND FLOCCULATION - HYDROLYSIS ACIDIFICATION - BIOLOGICAL CONTACT OXIDATION - MBR
Environmental Engineering and Management Journal › Vol. 12 › Nr. 7 AbstractWastewater from butyl rubber production is causing an increasing environmental problem due to its large quantity and complexquality. In this paper, two types of wastewaters generated from rubber synthesis, i.e. alkaline wastewater (AW) and cleaning andflushing wastewater (CFW), were investigated. Coagulation and flocculation were firstly applied to remove suspended solids(SS) from the AW. By single factor experiment, the optimum operational conditions were obtained as pH 8, PAC dosage 40... Autori: Lujun Chen, Rui Liu, Wei Li, Wei Zheng, Yan Zhang, Ying Li ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25950
RADIATION-INDUCED DECOMPOSITION AND POLYMERIZATION OF POLYVINYL ALCOHOL IN AQUEOUS SOLUTIONS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 7 AbstractPolyvinyl alcohol (PVA) is a typical refractory organic pollutant with low biodegradability and high molecular weight. Thispaper presents data on the radiolysis of PVA in aqueous solutions by using ionizing radiation. Response surface methodologywith Box-Benhken design of experiment was applied to analyze the interactions among initial concentration of PVA, absorbeddose, and initial pH of aqueous solutions on PVA removal efficiency. 9.4-89.4% PVA was removed based on differentcombination... Autori: Jianlong Wang, Jinping Tian, Lujun Chen, Shijun He, Weihua Sun ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25967
DSA ELECTRODES FOR TREATING PHARMACEUTICAL EFFLUENTS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 5 AbstractIn the last years many papers have reported about the occurrence of the pharmaceuticals in the surface waters and theirundesirable effects upon the aquatic life. Most of pharmaceuticals pass through the wastewater treatment plants unchangedbecause they are biorefractory compounds and as a result they enter the water bodies. Therefore, it is necessary to improve thebiodegradability of pharmaceuticals effluents (PhEs) before their discharge in the sewerage systems. The aim of this paper wa... Autori: Carmen Lazău, Florica Manea, Monica Ihos ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26021
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
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
ADVANCED OXIDATION OF AN AZO DYE AND ITS SYNTHESIS INTERMEDIATES IN AQUEOUS SOLUTION: EFFECT OF FENTON TREATMENT ON MINERALIZATION, BIODEGRADABILITY AND TOXICITY
Environmental Engineering and Management Journal › Vol. 13 › Nr. 10 AbstractThe objective was to study the degradation of azo dye C.I. Acid Orange 7 (AO7) and intermediates for its synthesis sulphanilicacid (SA) and 2-naphthol (2-N) by Fenton process. Full factorial design and response surface methodology were applied to modelthe system behavior influenced by studied process parameters ([Fe2+] and [H2O2]).Optimal process conditions were determined on the basis of mineralization efficiency. The effectiveness evaluation of appliedtreatment process was conducted on... Autori: Sanja Papić ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26569
DECOLORIZATION OF ORANGE II BY HETEROGENEOUS FENTON PROCESS USING GOETHITE AS CATALYST
Environmental Engineering and Management Journal › Vol. 14 › Nr. 4 Abstract
The effect of goethite addition, hydrogen peroxide concentration, initial pH, hydroxyl radical scavenger and initial dye
concentration on the decolorization of Orange II by Fenton-like process was investigated. The results showed that the
decolorization rate increased with goethite addition and hydrogen peroxide concentration, but decreased with the increase of
initial dye concentration. There existed an optimal initial pH to achieve the highest decolorization rate. The presence of
... Autori: Hui Zhang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26693
STUDY ON THE BIODEGRADABILITY OF FeMnSi ALLOY
Environmental Engineering and Management Journal › Vol. 15 › Nr. 5 A biodegradable iron based alloy was obtained through classical melting method using a furnace with controlled atmosphere. The
metallic material was obtained from high purity materials using a proper obtaining method. The material is proposed as an
alternative to magnesium alloys that have a very fast degradation period for applications with longer healing periods (more than 3
and between 12 to 18 months). The material was analyzed using scanning electron microscopy (SEM) and X-ray dispersive... Autori: Sergiu Stanciu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27023
INFLUENCE OF FREEZING/THAWING AND DRYING/MILLING ON BIOCHEMICAL METHANE POTENTIAL
Environmental Engineering and Management Journal › Vol. 15 › Nr. 7 In studies of biochemical methane production (BMP) researchers often collate a large number of samples at the same time for a
sample archive. The samples are often frozen to avoid microbial transformation, further homogenized by grinding. We studied
the influence of subfreezing/thawing and drying/milling of energy crop on BMP and anaerobic biodegradability (BD). Relative
standard deviation (RSD, %) between the BMP of controls and of the subfrozen was in the range 2.1–9.0%, and of the
d... Autori: Jin Mi Triolo ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27079
CAN DISINTEGRATION BASED ON COD (DDCOD) REPRESENT THE BIODEGRADABILITY OF DISINTEGRATED SLUDGE?
Environmental Engineering and Management Journal › Vol. 15 › Nr. 8 The research presented in this paper aimed to investigate the relationship between sludge anaerobic biodegradability and degree
of sludge disintegration based on COD (DDCOD) in a wide range from 0 to 66.7%. Sonication as an advanced sludge pretreatment
was used to disintegrate sludge. Meanwhile, biogas production in the anaerobic digestion process was used to present the sludge
biodegradability. The performances of anaerobic digestion for pretreated sludge at different degrees of disintegrati... Autori: Shuyu Yu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27100
AN NOVEL UCSB-ANR INTEGRATED SYSTEM FOR EFFICIENT REMOVAL OF ORGANIC MATTER AND AMMONIA NITROGEN FROM SWINE WASTEWATER
Environmental Engineering and Management Journal › Vol. 15 › Nr. 10 A combined system of up-flow cyclic sludge bed (UCSB) and aerobic nitrification reactor (ANR) was designed for organic
matter and ammonia nitrogen (NH4-N) removals of swine wastewater. The UCSB had one acidogenic zone for hydrolytic
acidification to solve the problem of poor carbon source in swine wastewater, and the other zone for denitrification. Results
showed that average removals of the chemical oxygen demand (COD) and NH4-N were 92% and 95%, respectively, under the
following conditions... Autori: Jie Zhang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27160
ELECTROCHEMICAL CATALYTIC DEGRADATION AND BIODEGRADABILITY ENHANCEMENT OF REAL TEXTILE WASTEWATER BY ANODIC AND CATHODIC REACTIONS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 10 An electro-Fenton process was carried out using undivided cell containing tridimensional graphite felt cathode for treatment of real textile wastewater. The study is essentially focused on effects of pH, applied current and transition metal types (Fe2+ and Cu2+) as catalysts on the electrochemical degradation efficiency based on color and COD removal and BOD5/COD value. The results indicated that pH 3 and applied current of 150 mA are the optimum conditions for decolorization and COD removal of ... Autori: Akbar Eslami ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27167
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
ASSESSMENT OF PERFORMANCE AND ADVANTAGES RELATED TO THE USE OF A NATURAL COAGULANT IN THE INDUSTRIAL WASTEWATER TREATMENT
Environmental Engineering and Management Journal › Vol. 16 › Nr. 8 The paper deals with the demonstration of the technical and environmental advantages related to the use of a tannin based
coagulant in textile wastewater treatments. The natural coagulant was tested to evaluate its performance in the
coagulation/flocculation process, the level of biodegradability in both aerobic and anaerobic conditions and the eco-toxicological
risks for aquatic systems. Results were compared with a common inorganic metal based coagulant. The findings at lab scale
showed th... Autori: Antonio Giuliano ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27407
ANAEROBIC DIGESTION OF FOOD WASTE FROM RESTAURANT OF A FERMENTATION INDUSTRY AND POTENTIAL FOR METHANE GAS PRODUCTION
Environmental Engineering and Management Journal › Vol. 16 › Nr. 9 In the present study, anaerobic treatment of food wastes from restaurants of a fermentation industry and methane gas production
yields produced during the treatment were investigated. For this purpose, food wastes with a Total Solid Contents (TS) ratio of 5-
7-10% were digested in a 100l experimental reactor. Batch anaerobic digestion studies were conducted at mesophilic
temperatures (36.5 oC) for 30 days and optimum Volatile Fatty Acids (VFA) and alkalinity values for methane gas production
... Autori: Sevgi Fersiz ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27429
TREATMENT OF PAPERMAKING TOBACCO SHEET WASTEWATER BY ELECTROCOAGULATION AND BIODEGRADABILITY ENHANCEMENT
Environmental Engineering and Management Journal › Vol. 16 › Nr. 12 Papermaking tobacco sheet wastewater exhibits high content of fine suspended solids (SS), intensive color and low biodegradability. Through the process of electrocoagulation (EC) using aluminum anode and stainless steel net cathode, the performance of wastewater treatment and the evolution of the main components in wastewater were examined. Maintaining the pH of wastewater, with 40 mA/cm2 of current density, 2.5 g/L of NaCl for a reaction of 6 min duration, 66.1% of the total chemical oxygen dem... Autori: Xiangjuan Ma ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27509
BIODEGRADATION BEHAVIOR OF POLY(VINYL ALCOHOL) – WOOD COMPOSITES
Environmental Engineering and Management Journal › Vol. 18 › Nr. 1 A study on the biodegradability of several formulations based on poly[vinyl alcohol] (PVA) and wood flour has been carried out.
Basically, all formulations are based on PVA and wood flour, and the influence of starch, glycerol and/or polyvinyl chloride (PVC)
incorporated in some of them was investigated. Biodegradation was performed by incubation of the composites with a selected
Aspergillus niger strain able to act as an polymer biodegrading agent. The composites biodegradation was evaluated... Autori: Luiza Jecu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27886
BASIC RED DYE REMOVAL BY COUPLING ELECTROCOAGULATION PROCESS WITH BIOLOGICAL TREATMENT
Environmental Engineering and Management Journal › Vol. 18 › Nr. 3 The applicability of an electrocoagulation process with the biological treatment for the color removal of C.I. Basic Red 46 (BR46)
dye was studied. It was shown that decolorization efficiency increased by increasing current density (j), pH, temperature (T) and
agitation speed (ω) and decreased with the initial dye concentration [BR46]0. The optimal conditions in presence of a grid electrode
(waste) used as cathode were found to be j=9 mA cm-², pH 8, T=35°C, [BR46]0=30 mg L-1 an... Autori: Katia Madi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27927
ENHANCEMENT OF BIOGAS PRODUCTION FROM FOOD WASTES IN A HYBRID ANAEROBIC–AEROBIC BIOREACTOR BY MANURE ADDITION AND LIME-PRETREATMENT OF RECYCLED LEACHATE
Environmental Engineering and Management Journal › Vol. 18 › Nr. 12 The production of food wastes is a serious issue in developed and developing countries. The biogas production technology is one of the most sustainable methods for treating food wastes. Currently, there is a great need to implement suitable methods to enhance biodegradation and methane production. This study investigated the effect of manure addition and leachate lime-pretreatment on the biogas and methane production from spoilable municipal solid wastes using a hybrid anaerobic-aerobic bioreact... Autori: Fatemeh Aliasgari ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28123
AGRI-WASTES AS A LOW-COST ADSORBENT FOR NICOSULFURON HERBICIDE
Environmental Engineering and Management Journal › Vol. 19 › Nr. 2 The contamination of aquatic and terrestrial environments by pesticides is highlighted by their possible toxic properties and poor biodegradability on the environment. The development of low cost by products from agricultural sectors as a suitable solution for contaminated areas remediation is of great environmental interest. Straw wastes can be considered as a promising alternative to remove different chemical compound that are environmentally toxic.
In this study, some materials derived from ... Autori: Irina Gabriela Cara ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28161
OLIVE MILL WASTEWATER (OMW) TREATMENT BY HYBRID PROCESSES OF ELECTROCOAGULATION/CATALYTIC OZONATION AND BIODEGRADATION
Environmental Engineering and Management Journal › Vol. 19 › Nr. 8 The olive oil extraction industry is one of the most polluting wastewaters from the food industry, which is considered an important economic activity in the world. The environmental effects of olive wastewater are related to chemical and organic loading, which is resistant to biodegradation processes. The purpose of this study was to determine the efficiency of combined electrocoagulation,
catalytic ozonation, to reduce organic load and improve the biodegradability of olive oil sewage. The pres... Autori: Mohammad Reza Khani ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28261 |