Contain all the articles from this issueICEEM /02 PLENARY SESSION:"Environmental Engineering and Management in the Context of Sustainable Development"Design for sustainability (D4S): towards advanced product conceptsHan Brezet, Sacha SilvesterICEEM/02 - ENVIRONMENTAL ENGINEERING SECTION"Water and Wastewater Treatment Technologies"Complex approach to the problem of persistent organic pollutants degradation in water environmentVictor Covaliov, Olga Covaliova, Angela Cincilei, Gilles Mailhot, Pasca...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25176

AbstractThe possibility of biological phosphorus removal (BPR) was studied using a lab-scale single reactor the same as SHARON process. Up to now, there has been no investigation of the feasibility of SHARON process for the purpose of phosphate removal. The optimal operation conditions were established to obtain highest removal rates. Under the experimental conditions, the phosphorus concentration dropped from an influent concentration of 1000 mg/L to levels around 0.1 mg/L or less. It was concl...
Autori: Abbas Rezaee, Hatam Godini, Masod Solimani, Nayera Nami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25293

Include urmatoarele articole:� Removal of nickel from aqueous solution by Nordmann FIR (ABIES Nordmanniana (STEV.) SPACH SUBSP. Nordmanniana) cones� Determination of heavy metals in extracts and macerates from garden flowers� Biological phosphorus removal in a high performance single reactor � Advanced Cd2+ removal on dispersed TioO2-fly ash � Remediation techniques for contaminated soils� Separation of uranium(vi) from soils by extraction in aqueous PEG (1550) - Na2SO4 - Na2CO3 two-...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25296

AbstractThe study presents the processing possibilities for marc resulted as still residue from the distillation of fermented fruits in view to obtain a compacted solid fuel. Initial marc composition (carbon, hydrogen, nitrogen, sulphur and oxygen contents) determined by elemental analysis is evidenced, as well as technical characterisation (ash and moisture contents) and ash's qualitative composition, chemical characterisation of the liquid phase (pH, total phosphorus, acidity and conductivity)...
Autori: Daniela Simina Stefan, Anca-Ileana Penu, Mircea Stefan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25391

Abstract The analysis over the underground water monitoring system and the collected data from survey drilling show that the underground water has an unsatisfactory quality due to some physical and chemical characteristics. Along with these, factors like the surface water pollution, the hydrodynamic exchange between surface and underground waters and the reintroduction in the agricultural activities of nitrates and phosphorus based fertilizers lowers, as well, the quality that it has been tal...
Autori: Ioan Crăciun, Catrinel-Raluca Giurma-Handley, Ion Giurma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25436

Abstract It's well known the degradation of many Romanian (including Dobrogea) soils, both in hill and in plain environments, due to the increasing anthropic pressure on natural resources. Soil erosion and organic matter loss are recognized as the main processes responsible of such degradation and of the rising risk of desertification, to which land use changes and politics for agriculture not suitable for land specificities often contribute. The knowledge of land use impact on soil quality i...
Autori: Marioara Nicolaescu, Naliana Lupascu,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25453

Abstract Mesoporosity of about 7 nm in ETS-10 titanosilicate was generated by postsynthesis treatment with hydrogen peroxide under microwave irradiation, resulting in an increased external surface area of the materials (55 m2/g). The influence of titanosilicate porosity and its surface modification by phosphorus atoms (ET(P)S-10) on the retention of some nanoions (??-emitting radioactive U(VI) and Th(IV) ions) and biomolecules (the proteins cytochrome c, papain, and ??-globulin) was investiga...
Autori: Robert Gradinaru, Sorin O. Valu, Stefan Postolache, Claudiu C. Pavel, Ion Sandu, Karin Popa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25455

Abstract Application of ozone is known to yield favorable results in purification of phosphate plant water from elemental phosphorus, in treatment of water of alkali aluminate solutions of aluminum plants, in decontamination of cyanide-containing waste water of enrichment plants, and so on. It has been proved that halogen-containing compounds, most of which have mutagenic properties, and some of which are carcinogenic to humans, are formed when water is treated with chlorine. Conclusions made...
Autori: Irina Dumitriu, ,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25483

A multi-stage filtration system located next to Lushan River in Gaofeng Town of Chongqing, P.R. China was built to indicate the impact of loading rate on agricultural runoff purification performance. The experimental system was proved to be effective in the removal of agricultural non-point source pollutants, and it was adapted to the changes of influent quality and quantity. The average removal rate of chemical oxygen demand (COD), ammonia (NH4 +-N), total nitrogen (TN) and total phosphorus (TP...
Autori: Lei Huang, Xu Gao, Wei-dan Xie, Jun-hong Chen, Xiao-xia Ma, Ming-guo Chen, Jin-song Guohttp://www.ecozone.ro/reviste.php?RID=25682

Our investigation in 2007 revealed that the concentration of microcystin (MC-LR) in Miyun reservoir was 0.224 μg L-1, below the safety limit of surface drinking water in China (1.0 μg L-1). The phytoplankton community in Miyun reservoir was composed of 8 divisions and 84 species (including genera and varieties). The density of phytoplangkton was 393.71?—104 cells L-1 including 24.6% of Chlorophyta, 32.5% of Cyanophyta and 15.3% of Bacillariophyta. The toxin-producing cyanobacteria incl...
Autori: Huimin Li, Guisen Du, Yumei Wu, Dianwei Wu, Jingshi Wanghttp://www.ecozone.ro/reviste.php?RID=25691

Abstract:Based on the fuzzy logic principle, a modified Fuzzy Synthetic Evaluation (FSE) is proposed to assess water quality status ofWeihe River (Baoji, China). The potential application of the FSE has been tested in a case study. Twelve sampling locations ofWeihe River and its tributaries in Baoji area were selected and seven water quality parameters of BOD5, COD, fluoride, ammonia,total phosphorus (TP), total nitrogen (TN) and permanganate index, were monitored from 2008 to 2009. The findings...
Autori: Chundi Xu, Jun Zhang, Qi Zhou, Yani Geng, Yaqian Zhao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25780

Abstract: The paper focuses on eutrophication due to nutrients load into a reservoir. A thermally stratified reservoir water body is divided in vertical layers and horizontal zones according to water temperature and depth. The layers show different compositions of limiting nutrient because of the density of flow and due to inhabitants on the bottom of the reservoir exposed to sunlight. The bioassay for algal growth potential test (AGPT) is the most direct and effective way to determine a limitin...
Autori: Dimitri Solomatine, Ioana Popescu, Jae-Ki Shin, Nahm-Chung Jung, Peter Kelderman, Roland K. Price
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25798

The nitrogen and phosphorus management in agricultural systems leads to an increased input of plant nutrients and sustains the soil fertility. Microbes contribute through different mechanisms to nutrient cycles, transforming it available for plants. Isolation of 18 Azospirillum and 18 Azotobacter bacterial isolates was effectuated from the rizosphere and interior roots of the following plants: Carex fusca All., Carex rostrata Stokes., Eriogonum latifolium Sm., Carex elata All., and from Equisetu...
Autori: Csaba Dezso Andras, Eva Gyorgy, Eva Laslo, Gyongyver Mara, Rozalia Veronika Salamon, Sarolta Szentes, Szabolcs Lanyi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25894

Abstract Effects of the aeration rate on nutrient removal from synthetic domestic wastewater using an intermittently aerated sequencing batch reactor (IASBR) were studied at ambient temperature. Two aeration rates, 0.8 and 1 L air/min, were studied. At the aeration-rate of 0.8 L air/min, removals of COD, NH4+-N, total nitrogen (TN) and PO43--P were 84%, 96%, 75% and 99%, respectively. At the aeration rate of 1 L air/min, removals of COD, NH4+-N, TN and PO43--P were 90%, 99%, 70% and 66%, re...
Autori: Liam G. Henry, Liwen Xiao, Xinmin Zhan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25941

Abstract An activated sludge from SBBR (sequencing biofilm batch reactor) reactor filled with Fe0  as filler had been acclimated to Fe(III)rich environment aiming at secure an enrichment culture of iron-reducing bacteria. The dissimilatory Fe(III) reduction ability and its efficiency on the effect of nitrogen and phosphorous removal by dosing different Fe(III) under anaerobic condition were investigated. The mechanism was also proposed based on the results derived from the experiment a...
Autori: Jie Li, Juanjuan Feng, Siyuan Zhai, Ya’e Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25943

AbstractBy investigating the basic physicochemical characteristics, nutrients (nitrogen, phosphorus and potassium) and heavy metalconcentrations of the excess sludges from four wastewater treatment plant (WWTP) in Xi’an city, the feasibility of applyingsewage sludge to landscaping in Xi'an was studied. The results showed that the basic physicochemical properties of sewagesludge satisfy the requirement of most plants growth. The sewage sludges are rich of organisms, nitrogen and phosphorus, butre...
Autori: Bohan Yin, Qin Zheng, Rixia Zhang, Sheping Wang, Xinan Liu, Zhengliang Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25964

AbstractLake Taihu is a shallow, wind-driven lake where eutrophication is always a serious problem. The study presented hereininvestigates the effect of wind on the eutophication of the lake, by using a two-dimensional (2D) hydrodynamic model coupledwith a 2D water quality model. The 2D water quality model looks in particular at the water quality situation of Lake Taihu in theyear 2008 and predicts future changes in the algae bloom situation. The Delft3D modelling tool was used to build thehydro...
Autori: Arthur Mynett, Chao Yue, Ioana Popescu, Leo Postma, Quan Pan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26037

Abstract Using sludge with dangerous substances content as an agricultural fertilizer can provide risks for humans and all environmental components. An important risk factor that had to be taken into account is the combination of sludge used as a fertilizer and agriculture activities that has its own consequences. In this paper, a risk evaluation for sludge disposal was elaborated. The most important risk factors in the studied case, wastewater sludge used as an agricultural fer...
Autori: Elena Manea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26141

AbstractTo explore the water quality and biodiversity of surface microlayer (SML) in fresh waters, we investigated the water status ofSML and subsurface water (SSW) of three fresh waters in China during April to August of 2010, by chemical and biologicalmonitoring methods. The results showed that the indexes such as total nitrogen (TN), total phosphorus (TP), chemical oxygendemand (COD) exceeded the national III or IV level of surface water quality, and the contents of indexes of SML were muchhi...
Autori: Jiang Yu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26158

AbstractA novel parallel A2O-MBR system was developed in this study based on the theory of denitrification with phosphorus removal.By utilizing the denitrifying phosphorus accumulating bacteria (DPB), the carbon source in the influent could meet the needs ofboth the denitrification and dephosphorization processes. Therefore, the carbon source restriction in conventional A2O processeswas resolved. The proposed system was inoculated with the sludge collected from the secondary settling tank in a m...
Autori: Liang Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26170

AbstractRiparian buffers play an important role in improving water quality, providing wildlife habitat, and reducing suspended sedimentsand pollutants entering the water body. The efficiency of pollutant reduction by a riparian buffer is greatly influenced by thewidth of the riparian buffer. In this study, the Soil and Water Assessment Tool (SWAT) model was applied to the YudeungStream watershed, Daejeon Stream watershed, and Gap Stream watershed to determine the most effective width of the ripa...
Autori: Jongpil Moon
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26223

AbstractThe present study is aimed at a long-term treatment performance of a constructed wetland with horizontal subsurface flow atJimlíkov, Czech Republic. The system was put in operation in 1993 and the treatment performance is evaluated for the period1998-2009 due to non-existence of results from the beginning of operation. The parameters of concern were BOD5 (biochemicaloxygen demand), COD (chemical oxygen demand), TSS (total suspended solids), NH4-N (ammonia-N) and TP (totalphosphorus). A t...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26258

AbstractA number of 138 samples of citrus fruits (oranges), produced in Souss-Massa area in south of Morocco, were analysed. Amultiresidue method was assessed for the determination of several organophosphorus pesticides using gas chromatography. Theextraction of pesticides was carried out by liquid-liquid extraction and solid-phase clean-up. The pesticide were separated bycapillary column gas chromatography and detected by the Nitrogen Phosphorus Detector (NPD). The majority of pesticidesrecover...
Autori: Abdelaziz Ait Addi, El Habib Ait Addi, Fouad Achemchem
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26320

AbstractA septic tank is an essential part of the decentralized wastewater management system. The aim of the experiment described inthis paper was to evaluate the impact of the method of sampling and hydraulic retention time (HRT) on the performance of acircular three chamber septic tank and to design a septic tank for a single household with four residents and wastewater flowrateof 0.6 m3/d. It was found out that the difference between suspended solids (SS) and chemical oxygen demand (COD) remo...
Autori: Ala Kirjanova, Mindaugas Rimeika, Regimantas Dauknys
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26329

AbstractIn this work, the effect of the addition of some nutrients on fungal growth and removal of Cr(III) were investigated. Theconsidered fungi, isolated from real tanning factory environment were Phanerochaete chrysosporium, Aspergillus niger and A.oryzae. Firstly, the optimal conditions for fungal growth were determined as a function of pH, contact time, temperature andagitation speed. Secondly, the effect of the addition of some nutrients on fungal growth was examined. Without the addition ...
Autori: Abdeltif Amrane, Mansur Zarrabi, Mohammad Noori Sepehr
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26337

AbstractThe removal of phosphorus by strongly basic anion exchanger was investigated. Removal efficiency increased with contact time,resin mass and initial solute concentration, while temperature showed a reverse effect. Equilibrium data were best fitted ontoLangmuir isotherm model (R2>0.99). Maximum sorption capacity of the resin was 66.22 mg/g, namely significantly higher thevalues reported in the literature. The Freundlich parameter (n = 4.3) and the Langmuir separation factor (RL = 0.067-...
Autori: Abdeltif Amrane, Hamid Reza Ghaffari, Mansur Zarrabi, Mohammad Mahdi Soori, Mohammad Noori Sepehr, Saied Borji
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26343

AbstractThe discharge of industrial effluents is a growing concern for companies, policy makers and the sanitary water system due to thepossible damage to environment. In Spain, wastewater discharge made into the sewer network is regulated locally by the SanitaryTax (ST). Consequently, for the latter, regulation and cost differences exist. In this paper, the role of Spanish STs to promoteenvironmental protection through the treatment of industrial wastewater (IWW) is analyzed. The study is focus...
Autori: Irene Carra, Isabel María Román Sánchez, José Antonio Sánchez Pérez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26350

AbstractAcid rain is a general term used to describe acid depositions, i.e. rain, fog and snow (known as wet deposition), as well as acidgases and particles (known as dry deposition). Acid rain is of particular environmental concern in Romania, as many soils havelately become acidic, causing serious damages to plants, animals and human beings. The purpose of this study is to evaluate bysimulation the impact of acid rain on a podzol sample taken from the Retezat National Park, a Romanian protecte...
Autori: Clementina Moldovan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26399

AbstractAnalysis and monitoring of arsenic is still a challenging analytical task. Due to its complex behaviour (different forms of arsenicthat can be present depending on pH and oxidation states of arsenic) as well as demanding analytical procedures and instrumentaltools for control of arsenic concentration in drinking water which is set to 10 μg L–1, there are still some open questions andissues when arsenic is the scientific topic. In this paper the idea was to use a multivariate statist...
Autori: Vladana N. Rajakovic-Ognjanovic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26506

AbstractThe incorporation of phosphorus (P) into sediments and the changes in its bioavailability under intermittent P input and sedimentresuspension conditions were investigated via laboratory experiments. The sediments were disturbed daily for 10 min and thenallowed to settle for 1430 min after each disturbance to simulate the intermittent sediment resuspension conditions. The removalof soluble reactive P from the overlying water under sediment resuspension was greater than that under static c...
Autori: Li Dapeng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26567

Abstract Malathion is a toxic, wide-spectrum organophosphorus pesticide. The removal of this pesticide from water is one of the major environmental concerns. In this study, the biodegradation of malathion using batch activated sludge was studied. The effect of initial malathion concentration (5 to 140 mg/L) on the degradation process was investigated. The biokinetic parameters (rs max, Ks and Ki) were estimated. Identification of dominant bacterial flora was also achieved. In addition, two k...
Autori: Djaber Tazdaďt
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26625

Abstract The effects of nitrogen (N) and phosphorus (P) addition to peatland ecosystem on emissions of nitrous oxide (N2O) were measured using the closed chamber method during one growing season within a peatland on the Tibetan Plateau. The highest N2O fluxes occurred during late spring (May), while fluxes of N2O were lowest during early autumn (September). No significant correlations were found between N2O emissions and soil temperature. Because of the sites stable hydrological conditions n...
Autori: Yongheng Gao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26626

Abstract Anaerobic processes have been successfully applied in the treatment of municipal and industrial wastewaters. Judicious use of nutrients in anaerobic treatment has not been systematically investigated. The optimal nutrient dosage for anaerobic wastewater treatment systems is largely unknown. In this paper, COD:N:P ratio used by various researchers in anaerobic wastewater treatment systems for treating different types of wastewaters are compiled and critically analyzed. In order to ha...
Autori: Athar Hussain
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26697

Abstract The intensive vegetable system means that more toxic organic and inorganic compounds are entering the environment. The aim of this study was to obtain the necessary answers on the content of organophosphorus pesticides (OPPs) regarding to quantify these residues on soils cultivated with vegetables in conventional, organic and conversion systems, and also determine which pesticide residues are going in edible vegetable parts. A number of 23 OPPs were analyzed from soil (50 samples) ...
Autori: Vasile Stoleru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26768

Abstract Thermophilic anaerobic digestion is a suitable technology to treat agricultural waste because of its higher biogas production, hygienisation effect and solids removal efficiency. Although these benefits, poor effluent quality and instability are encountered in some cases. The anaerobic co-digestion of winery waste and waste activated sludge at 55°C, operating at 23 days HRT and with an organic loading rate of 3.2 kg COD/m3d, was characterized by accumulation of volatile fatty ac...
Autori: Cinzia Da Ros
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26775

Abstract The aim of this paper is to assess the chemical and mineralogical composition and the leaching behavior of the electric arc furnace slags (EAFS) in order to improve their management by identifying suitable reuse options in different fields. The chemical and mineralogical composition of slag varies from one type of steel to another, from one technological stage to another and from one steel plant to another. In order to minimize the slag quantities disposed in the slag dumps one has ...
Autori: Dana-Adriana Iluţiu-Varvara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26835

Abstract The adsorption of phosphorus (P) on sediment plays a significant role in phosphorus transport in aquatic systems. This research examined the effect of the main components of sediments (including iron (Fe), manganese (Mn) oxides and organic matter (OM)) on P adsorption and to evaluate their relative contribution with different sediment particle sizes. The sediments were separated into four particle-size fractions: 0-30 μm, 30-62 μm, 62-90 μm, and 90-125 μm, and then selec...
Autori: Yang Xiao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26873

In this work, coagulation features and characteristics of dissolved organic matter (DOM) in combined sewer overflow (CSO) wastewater were investigated. Ferric chloride (FeCl3) and polyaluminum chloride (PAC) were employed in the coagulation process. Results showed that both FeCl3 and PAC are effective in removing turbidity and total phosphorus (TP). Removal efficiencies were all above 90% when dosages were reasonable. Chemical oxygen demand (COD) removal efficiency was between 60% and 70%. T...
Autori: Wei-gang Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26931

This study investigates the effects of earthworms and a variety of substrates on photosynthetic characteristics and rate of uptake of nitrogen (N) and phosphorus (P) by Iris pseudacorus L. (Iridaceae) in a constructed wetland system under greenhouse conditions. The study seeks to identify those factors that maximize the efficient removal of N and P. Four substrates were tested: pure sand, sand and soil, sand and organic matter, and a mixture of sand, soil and organic matter. The photosyntheti...
Autori: Defu Xu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26936

The aim of this study was to examine the pollutant removal performance of a combined process using horizontal subsurface flow constructed wetland (HFCW) and an oxidation pond (OP) in the treatment of a decentralized domestic wastewater. Waters along the water flow and at different depths of the wetland substrate were sampled and analyzed during continuous operation. It was found that the HFCW-OP combined system presented good organic matter and phosphorus removal capacity. In the first year, ...
Autori: Wendong Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26943

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

This study was carried out to monitor the presence of organophosphorus in drainage water (Kafr El-Sheikh (Kotshinar Drainage), Fowa (Fowa Drainge No.11), Metobess (El-Hokss Drainage), Beila (Karakat Drainage), Balteem (Hafeer Shihabeldeen Drainage), Nashart Drainage and El-Hamoul (El-Hamoul Drainage) in Kafr-El-Sheikh Governorate, Egypt. Furthermore, the efficacy of chemical (advanced oxidation processes) and bioremediation (effective microorganisms) for chlorpyrifos removing in drainage wat...
Autori: Aly Derbalah
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27104

It is of great concern to reduce greenhouse gases (GHG) and ammonia (NH3) emissions from animal manure composting in China. The purpose of this study was to investigate effects of adding red mud on emissions of GHG (methane (CH4), nitrous oxide (N2O)) and NH3 in full-scale swine manure windrow composting. Two full-scale swine manure windrow composting experiments were carried out to compare emission of GHG and NH3 with and without addition of red mud. Results showed that the addition of modified...
Autori: Chenyang Zhao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27158

Occurrence of antibiotics and heavy metals, together with concentrations of conventional pollution indicators were assessed in digested piggery wastewater (DPW) generated in ten large-scale pig farms in Jiaxing City, China. Results showed that water quality of DPW varied in different farms as well as in different seasons. Digested piggery wastewater pollution tended to be less serious in Summer than in Spring, Autumn and Winter. Conventional pollution indicators of chemical oxygen demand (COD...
Autori: Rui Liu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27159

Three pilot-scale biofilters consisting of 1 m aerobic woodchip layers and 0.5 m submerged woodchip layers were constructed to treat the separated pig manure anaerobic digestate (SAD). Reductions of 54% dry matter, 80% of chemical oxygen demand (COD), 93% of 5-day biochemical oxygen demand (BOD5), 86% of total nitrogen (TN) and 79% of total phosphorus (TP) were achieved. The study results confirm the occurrence of nitrification in the aerobic woodchip layers and denitrification in the submer...
Autori: Kathy Carney
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27161

Phosphorous (P) and organic carbon (OC) found in organic matter (OM) play pivotal role in the productivity process of aquatic environment and significantly controlling its physico-chemical properties. The excessive P and OC containing muds of aquaculture systems deteriorate the congenial culture environment through developing eutrophication problems. The objective of present study was to determine the distributional relationship between the P, OC, and OM in the mud of shrimp-farming ponds of Vie...
Autori: Jatindra N. Bhakta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27175

Waste from a cola beverage industry containing high concentration of phosphorus (P) was treated by the struvite precipitation method. The influence of excess of ammonia and order of reagent addition were evaluated as independent variables on the removal and recovery of phosphorus from cola beverage waste. It was removed about 95% of P of the sample in a short reaction time. The precipitated crystals were identified and analyzed by X-ray Diffraction (XRD), infra-red spectroscopy (IR) and surface ...
Autori: Wilson Roberto Barreto dos Santos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27188

As part of the 2012 Land Use/Land Cover Area Frame Survey (LUCAS), topsoil samples were collected in Bulgaria and Romania using the same methodology as for other EU Member States in an equivalent survey carried out in 2009. In total, 664 Bulgarian and 1384 Romanian samples were collected which enabled a comparative assessment of topsoil properties under different land covers within, and between, these countries, as well as in a broader European context. The samples were analysed for basic soil p...
Autori: Gergely Tóth
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27205

Water quality is a very important aspect in the perspective of durable, urban and rural development. At European level, several directives were implemented, with the purpose of regulating the degree of pollution for water sources. Both surface and underground water resources in Romania are being affected by pollutants, such as nitrites, phosphorus, generated through irrational usage of chemical fertilizers, but also through the discharge of urban waste water directly into river courses. The spat...
Autori: Andrei Enea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27280

The paper discusses the pollution status in the case of an important NE Romanian watercourse (Siret River) in Pascani town area based on the analysis of some water quality indicators (pH, temperature, dissolved oxygen, organics (COD and BOD5), conductivity, fixed residues, nitrogen-based nutrients (N-NH4+, N-NO3-, N-NO2-), phosphates, total phosphorus (P), total calcium (Ca2+), magnesium (Mg2+), iron (Fe2+, Fe3+), turbidity and suspended solids content) measured at three local strategic control ...
Autori: Carmen Zaharia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27281

The Amara Lake is located at the south-eastern part of Romania. It is a shallow lake with an average depth of 3m and average extent of 1.32 km2, having a particular importance for the area in which is situated. This importance derives from its main functions in the ecosystem, namely: source of food, shelter and breeding place for almost 54 bird, balneary tourism attraction and jobs for the residents of Amara who live in the northern part of the lake. Under these conditions, the sustainable devel...
Autori: Ofelia Axinte
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27282

Wastewater treatment using sequencing batch reactor (SBR) has certain advantages over conventional activated sludge system. The performance of sequencing batch reactor in treating high C/N ratio was investigated with suspended polyurethane and polystyrene attached growth biomass configuration. A sequence of 4 hr HRT, 0.3 month SRT and 1kg COD/m3 was employed to study treatment efficacy. Treatment performance was assessed by means of chemical oxygen demand (COD), total nitrogen (TN) and total pho...
Autori: Beenish Saba
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27478

The aim of the studies was to evaluate the influence of the 30-year operation of a small retention reservoir fed with water from a forest-agricultural catchment area on the contents of selected mineral elements substances in bottom deposits. The studies were carried out in the Łoje dam reservoir (N 53o7’28’’, E 20o48’20’’), supplied by the regulated Łojówka stream. Deposit samples were collected in four transects perpendicular to the reservoir...
Autori: Ireneusz Cymes
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27518

This work describes the variations in nitrogen (N) and phosphorus (P) removal performances and bacterial population dynamics in response to different influent C/N and C/P ratios in a novel BNR-IC process combining biological nutrients removal (BNR) with induced crystallization (IC). A good nutrients removal performance was achieved at 7.8 of C/N ratio and 23.3 of C/P ratio, where P and TN removal efficiencies were 94.0±2.4% and 90.5±4.3%, respectively. Moreover, significant changes...
Autori: Haiming Zou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27523

An anaerobic-aerobic (An-Ox) sequencing batch reactor (SBR) was operated for the growth of phosphate accumulating organisms (PAOs), while an anaerobic-anoxic (An-Ax) SBR was used for the growth of denitrifying PAOs (dPAOs). Both reactors exhibited successful enhanced biological phosphorous removal (EBPR) performance. The sludge P contents in the two reactors increased from approximately 2% at the beginning of the operation to 9.1% (An-Ox SBR) and 7.3% (An-Ax SBR) after 140 d. The results of the...
Autori: Hansaem Lee
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27525

Aerobic treatment processes using attached media have been studied extensively to remove organic matter from wastewater and also denitrification process. The objective of this study was to assess the ability of down flow anaerobic up flow oxic submerged bio-film reactor (DAUOSBR) to remove phosphorus, nitrogen compounds, BOD5, COD, turbidity and total suspended solids from the Farabi Hospital wastewater. The present work involved designing and building a reactor loaded with down flow anaerobic u...
Autori: Meghdad Pirsaheb
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27622

FLUCTUATION OF RIVER NETWORK WATER ENVIRONMENTAL CARRYING CAPACITY IN A COMPLICATED RIVER-LAKE SYSTEM    • MINERALOGY AND GEOCHEMICAL DISTRIBUTION OF HEAVY METALS FOR THE FAGUL CETĂȚII TAILINGS, ROMANIA    • ACCUMULATION AND AVAILABILITY OF TRACE ELEMENTS FROM SOIL INTO ORIENTAL TOBACCO GROWN IN MACEDONIA    • OLFACTORY EFFECT ON LANDSCAPE PREFERENCE    • EFFECT OF MOLASSES ADDITION AS BIODEGRADABLE MATERIAL ON PHENOL REMO...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27628

Though Scirpus triqueter plays an important role in protecting the ecological functions of Yangtze River estuary wetland which is frequently contaminated by petroleum, knowledge is limited about the mechanisms involved. In this study, comparative analysis of soil properties, microbial community structure and soil enzymes in the rhizosphere of S. triqueter and bulk soil was conducted throughout one year to provide an insight into the phytoremediation mechanism in the field. The total petroleum hy...
Autori: Jing Wei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27697

The objective of this study was to evaluate the effect of different doses of meat and bone meal (MBM) applied as organic fertilizer on the quality of groundwater in arable fields. The effect of meat and bone meal fertilizer applied at rates of 1.0, 1.5, 2.0 and 2.5 t ha-1 was compared with no fertilization, mineral fertilization, and manure fertilization (10 t ha-1). Groundwater samples for chemical analyses were collected every month during the growing season using piezometers installed in the ...
Autori: Arkadiusz Stępień
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27742

The City of Jacksonville, Florida USA is in the midst of an important program to reduce nutrient load from its municipal storm water system. New regulations promulgated by the US EPA and State of Florida have targeted nutrient reduction within the St. Johns River watershed which includes most of the City of Jacksonville. In order to reduce overall nutrient loads to the St. Johns River, the City of Jacksonville and its consultant team have begun a construction program to build a series of wet det...
Autori: Killian Eckert
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27750

Lake Hazar is one of the largest and deepest lakes in the Eastern Anatolia Region of Turkey. It is an outstanding natural resource and famous for its blue, clear, deep and alkaline waters. However, a drastic decrease in water quality and water clarity of the lake has occured in recent years. This decrease is mainly a result of nutrient and sediment transport to the lake. This study was conducted to assess water quality of Behrimaz Stream and amounts of freshwater, nutrients, major ions, biolo...
Autori: Memet Varol
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27891

A system dynamics (SD) process-based simulation model was developed using an object-oriented environment to simulate phosphorus (P) transformations in a two-stage pilot scale Dewatered Alum Sludge Cake (DASC) based Constructed Wetlands (CW), which is operated from February 2009 to January 2010 to treat relatively high concentration animal farm wastewater. Structural Thinking Experiential Learning Laboratory and Animation (STELLA v9.1.4) conceived on the principles of SD was used for the deve...
Autori: Lordwin Jeyakumar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27907

In this study the effectiveness of Lactuca sativa, Medicago sativa and Phragmites australis for the treatment of domestic wastewater in horizontal subsurface flow was investigated. The removal efficiency of chemical oxygen demand (COD), total nitrogen (TKN), total phosphorus (TP), and total suspended solids (TSS) was measured. The experiment was conducted in two different retention time (5 and 7 days) in three seasons (spring, summer and fall). The removal efficiency was increased as the rete...
Autori: Farham Aminsharei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28009

The aim of this research was to improve the removal of organic matter and nutrients from wastewater from pig farms in a combined batch reactor performed as anaerobic-aerobic sequential. For this purpose, it was suggested to include recirculation cycles of wastewater in a sequentially pulsed manner in the anaerobic treatment followed by intermittent aeration in the aerobic-anoxic treatment. This novelty implemented in both sequential reactors was studied under pilot scale conditions. The process ...
Autori: Jorge Alonso Cortes-Esquivel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28101

The recovery of nutrients from sewage sludge ash, especial phosphorus, is one of the most important alternative in sewage sludge management. Phosphorus is an essential element for all living organisms and very important for agriculture and industry, as well as. Because the phosphorus is a non-regenerative resource, its recovery plays an important role for society. Phosphorus capitalization as struvite (NH4MgPO4.6H2O) from sewage sludge has attracted considerable attention due to its potential to...
Autori: Bogdan Adrian Militaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28158

The paper covers the results of a study, carried out during 2005 and 2018, regarding the impact of sludge dump of a wastewater treatment plant from Iasi city, Romania, on the soil characteristics. Experimental research was conducted to highlight the evolution of the heavy metal content of both the material in the storage site and the soil in its proximity. The following heavy metal concentrations were analyzed with atomic adsorption spectrometry method: Zn, Ni, Cr, Pb, Co, Cu and Cd. Research ha...
Autori: Georgiana Cezarina Bartic Lazăr
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28164

This study investigates the capability of furnace bottom ash (FBA) as a filter media for phosphorus removal from wastewater effluents. Lab-scale studies were conducted, in which a mass of FBA was brought into contact with the phosphate solution (a predominant form of phosphorus in wastewater) in batch experiments and lab-scale filter. Intraparticle Diffusion Model (IPD) was applied and revealed that the mechanism of phosphate adsorption onto FBA consist of three phases; film phase occurred in...
Autori: Ali Alzeyadi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28191

In Brazil, there is a deficit of access in relation to sewage services for a large part of the population, and this fact is the one responsible for the contamination of watercourses. This is because to the lack of investment in infrastructure in the country, since sewage treatment plants require high costs and high area demand for deployment, besides the installation of the collection system, which directs the wastewater to treatment. This paper describes the behavior of wetlands as a post trea...
Autori: Rodrigo de Freitas Bueno
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28241