PFS混凝-Fenton-SBR反硝化脱氮-BAF组合工艺深度处理垃圾渗滤液     

陈振雄  黎志华  范爱军  陈巧文 《西部资源》2012,(3):155-160

采用混凝沉淀-Fenton-SBR反硝化脱氮-BAF法工艺对经SBR处理的垃圾渗滤液进行深度处理。在进水污染物平均浓度为:CODcr=800mg·L-1,BOD5=50mg·L-1,NH3-N=10mg·L-1,NO3-N=550mg·L-1,TN=630mg·L-1,色度=600倍的情况下,组合工艺的最佳条件为:PFS加药量为0.5g·L-1;H2O2(30%)投加量为0.6m·lL-1,Fe2+投加量为0.005mo·lL-1,反应时间为4小时;反硝化以甲醇为外加碳源,碳氮比为3.2。最终出水水质CODcr≤80mg·L-1,BOD5≤10mg·L-1,NH3-N≤1.0mg·L-1,NO3-N≤10mg·L-1,TN≤10mg·L-1,色度≤15倍,SS≤10mg·L-1,达到生活垃圾填埋场污染排放标准(GB16889-2008)。组合工艺的药剂总成本低于6.85元/吨。  相似文献   

吲哚类杂环芳香族有机物在好氧和厌氧条件下的微生物降解途径   总被引：2，自引：0，他引：2  

王莹莹  叶彩云  范延臻  顾继东 《矿物岩石地球化学通报》2003,22(2):170-173

用红树林的底泥通过富集培养得到在好氧或厌氧条件下能完全矿化吲哚的细菌，并对降解过程及中间代谢产物进行了鉴定。此研究中，吲哚化合物是培养液中的唯一碳和能量来源，而厌氧条件包括有产甲烷和硫酸盐还原。结果表明，不论在哪种条件下，吲哚噪降解过程分二步敖基化反应，分别发生在2和3位上，形成氧化吲哚和靛红。同时，1、2或3位上的甲基替代使1—甲基吲哚，2—甲基吲哚和3—甲基吲哚的降解受到严重抑制。显然，杂环类芳香族化合物的代谢有其共同点，同时不同替代会完全改变有机物的可降解程度。  相似文献   

Soil-Column Test on Aniline Degradation in Riverbank Filtration under Denitrification Conditions     

WuYaoguo WangHui ZhangWencun SunWeijian 《中国地质大学学报(英文版)》2005,16(2):183-188

INTRODUCTION Riverbankfiltration(RBF)isaprocessbywhich surfacewaterissubjectedtogroundpassagebeforebe ingcollectedandusedasadrinkingwatersource(His cockandGrischek,2002;Rayetal.,2002;Doussanet al.,1997).Duringinfiltrationandtravelthroughthe riverbedandaquifersediments,surfacewaterissubjec tedtoacombinationofphysical,chemical,andbiologi calprocessesthatcansignificantlyimprovetherawwa terquality(HiscockandGrischek,2002).Thus,RBF hasbeenusedasapretreatedmethodtoimprovedrink ingwate…  相似文献   

Effects of a diel oxygen cycle on nitrogen transformations and greenhouse gas emissions in a eutrophied subtropical stream   总被引：2，自引：0，他引：2  

John A. Harrison  Pamela A. Matson  Scott E. Fendorf 《Aquatic Sciences - Research Across Boundaries》2005,67(3):308-315

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Aerobic landfill test cells and their implications for sustainable waste disposal   总被引：2，自引：0，他引：2  

Adam D. Read  Mark Hudgins  & Paul Phillips 《The Geographical journal》2001,167(3):235-247

Municipal Solid Waste (MSW) landfills world-wide are experiencing the consequences of conventional landfilling techniques, whereby anaerobic conditions are created within the landfill waste. Under anaerobic conditions, slow stabilization of the waste mass occurs, producing methane, (an explosive, 'greenhouse' gas) and toxic leachate over long periods of time. As a potential solution, it was demonstrated that the aerobic degradation of MSW within a landfill can significantly increase the rate of waste decomposition and settlement, decrease the production of methane gas, reduce the level of toxic organics in the leachate and decrease quantities of landfill leachate that need treatment. This paper summarizes the successful results of two separate aerobic landfill projects located in Georgia (USA) and discusses the potential economic and environmental impacts to world-wide solid waste management.  相似文献   

Nitrogen Removal in Wastewater Irrigation Systems and Its Influence on Groundwater Pollution     

Wang Min Wu Yongfeng Tang Minggao Zhong Zuoxin Shen ZhaoliHydrogeological Department  China University of Geosciences  Beijing 《中国地质大学学报(英文版)》1995,(2)

The experiment included ten soil columns and field investigation in 1-2 year duration. Data on the columns continuously flooded with waste water indicated that when total input of NH_4-N reached to above 70％ of the NH_4-N adsorption capacity in soil the breakthrough would appear in the output . Adequate removal of nitrogen from the waste water would require at least 170 cm deep groundwater table . Fine textured soil would promote denitrification . The columns simulating discontinuous waste water irrigation indicated that denitrification existed only in the partial microenviroument of reduction . Groundwater table depth had no strong influence on nitrogen removal . The investigation in field revealed that the groundwater recharged with waste water was not polluted by nitrogen when the aeration profile was in finer textures owing to the combined contribution of nitrification and denitrification.  相似文献   

Eulerian-Lagrangian formulation of the equations for groundwater denitrification using bacterial activity     

S. Sorek  C. Braester 《Advances in water resources》1988,11(4)

A mathematical model for groundwater denitrification using bacterial activity is presented. The model includes the momentum and mass balance equations for water and nitrogen, substrate and bacteria, and chemical reactions between them. The resulting multiphase, multicomponent, flow and transport governing equations, are coupled and nonlinear. A Eulerian-Lagrangian formulation of the equations is developed. The water and gas flow and transport equations are split into forward advection along characteristics, and a residual at a fixed frame of reference. Discontinuities, sharp fronts and steep gradients of the dependent variables are imposed on the advection mode and solved exactly. It is believed that this novel method will avoid numerical artifacts for the solution of the multiphase flow equations (e.g., upstream permeability) and numerical dispersion for the transport equation.  相似文献   

Denitrification in Chongming east tidal flat sediment, Yangtze estuary, China   总被引：6，自引：0，他引：6  

WANG Dongqi  CHEN Zhenlou  XU Shiyuan  HU Lingzhen  WANG Jun 《中国科学D辑(英文版)》2006,49(10):1090-1097

From July 2003 to July 2004, samples were collected on Chongming Island east tidal flat every two months. The research showed that the nitrous oxide (N2O) production rate was very low in the water, Chongming east tidal flat (CM) sediment was the N2O source of the water. Sediment N2O natural production rate was between -0.08 and 1.74 μmolN·m-2·h-1. N2O natural production rate was higher in the summer. The difference of the N2O natural production rate in the different tidal flats, the correlation between the N2O natural production rate and the denitrification rate, and those with the temperature and DO indicate that middle tidal flat sediment denitrification was the main process of the N2O production, while in the low tidal flat sediment, the production of the N2O came from several processes of the nitrogen cycling. Tidal flat sediment denitrification reaction was stronger in summer and winter but relatively lower in the late autumn and early spring. Seasonal change of the sediment denitrification rate was wide, from 1.12 to 33.34 μmolN·m-2·h-1. Temperature, DO and the coactions of them had the prominent effect on the tidal flat sediment denitrification.  相似文献   

河流渗滤系统对硝态氮污水的净化作用研究     

李金荣  李金玲  杨振放 《水文地质工程地质》2007,34(1):24-28,43

河流渗滤系统对入渗的地表水有一定的净化作用,过去人们很少从理论上研究河流渗滤系统对污染河水的净化作用。本文采用室内土柱实验装置来模拟渭河渗滤系统,研究了硝态氮污染的河水在该系统中的环境行为及净化机制,其环境行为主要为反硝化作用。其净化程度与该渗滤系统的渗滤介质有关,如果渗滤介质为粘土,其净化率达到100%。若介质为粗砂粒物质,其净化程度较低。  相似文献   

The long-term effects of crude oil on microbial processes in subarctic marine sediments     

Robert P. Griffiths  Bruce A. Caldwell  William A. Broich  Richard Y. Morita 《Estuarine, Coastal and Shelf Science》1982,15(2):183-198

Subarctic marine sediments were exposed to fresh and ‘weathered’ crude oil from Cook Inlet, Alaska. The crude oil was thoroughly mixed with the sediment at various concentrations and some of the oil-sediment mixtures were placed on top of unamended sediments. Both sediments with added oil and those overlain by oiled sediments were investigated. These sediments were placed either in trays or aquaria. The trays were incubated in situ near the site from which the sediments were originally collected. The aquaria were maintained at simulated in situ conditions by maintaining a continuous flow of fresh seawater through them. The sediments were exposed to crude oil for periods up to 1.5 years. Sediments exposed to 50‰ fresh crude oil showed significant decreases in nitrogen fixation and denitrification rates and redox potentials. Also observed were increases in CO₂ production rates and methane concentrations. These same changes were observed in sediments exposed to 1‰. When ‘weathered’ crude oil was added to the sediments, the same changes were observed except there was no reduction in nitrogen fixation activity. In most cases, the observed effects were less marked when the sediments were amended with ‘weathered’ crude oil than with the same concentration of fresh crude oil. Untreated sediments that were overlain with treated sediments showed the same changes as those sediments that were thoroughly mixed with crude oil. The presence of fresh crude oil at 50‰ essentially eliminated burrowing activity of the benthic infauna. Under these conditions, there was an accumulation of detritus particles on the oiled sediments that was not present in the untreated controls.  相似文献