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混凝/微滤工艺用于青草沙水源水厂的生产废水回用研究 被引量:4
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作者 吴志玲 徐培嘉 陈洪斌 《中国环境科学》 EI CAS CSCD 北大核心 2014年第3期623-629,共7页
本文通过混凝/微滤工艺对青草沙水源水水厂的生产废水开展了回用处理研究,分析了常规污染物、微量有机物、金属离子的去除规律和消毒副产物生成趋势.结果表明,混凝预处理可以有效减缓膜污染;组合工艺对悬浮态物质如颗粒物、细菌、大肠... 本文通过混凝/微滤工艺对青草沙水源水水厂的生产废水开展了回用处理研究,分析了常规污染物、微量有机物、金属离子的去除规律和消毒副产物生成趋势.结果表明,混凝预处理可以有效减缓膜污染;组合工艺对悬浮态物质如颗粒物、细菌、大肠杆菌等有较好的去除效果,去除率均达85%以上;对溶解性成分,尤其是Al和微量有机物去除效果不佳,去除率均低于20%.生产废水膜过滤后相同的消毒剂浓度时消毒副产物的生成趋势高于砂滤池和炭滤池出水.研究认为,青草沙水源水厂的生产废水净化后回用的最佳回用点是砂滤池前或活性炭生物滤池前. 展开更多
关键词 生产废水 混凝沉淀 微滤 微量有机物 回用点 micro-filtration (MF)
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Effects of sterilization treatments on the analysis of TOC in water samples 被引量:3
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作者 Yiming Shi Lingfeng Xu +1 位作者 Dongqin Gong Jun Lu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2010年第5期789-795,共7页
Decomposition experiments conducted with and without microbial processes are commonly used to study the effects of environmental microorganisms on the degradation of organic pollutants.However,the effects of biologica... Decomposition experiments conducted with and without microbial processes are commonly used to study the effects of environmental microorganisms on the degradation of organic pollutants.However,the effects of biological pretreatment (sterilization) on organic matter often have a negative impact on such experiments.Based on the principle of water total organic carbon (TOC) analysis,the effects of physical sterilization treatments on determination of TOC and other water quality parameters were investigated.The results revealed that two conventional physical sterilization treatments,autoclaving and 60 Co γ-radiation sterilization,led to the direct decomposition of some organic pollutants,resulting in remarkable errors in the analysis of TOC in water samples.Furthermore,the extent of the errors varied with the intensity and the duration of sterilization treatments.Accordingly,a novel sterilization method for water samples,0.45 μm micro-filtration coupled with ultraviolet radiation (MCUR),was developed in the present study.The results indicated that the MCUR method was capable of exerting a high bactericidal effect on the water sample while significantly decreasing the negative impact on the analysis of TOC and other water quality parameters.Before and after sterilization treatments,the relative errors of TOC determination could be controlled to lower than 3% for water samples with different categories and concentrations of organic pollutants by using MCUR. 展开更多
关键词 STERILIZATION AUTOCLAVE 60Co γ-radiation micro-filtration ultraviolet radiation
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Theoretical Study on Dynamic Filtration with the Membrane in Simple Harmonic Motion 被引量:1
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作者 周先桃 陈文梅 +2 位作者 褚良银 易美桂 陈明惠 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2004年第5期723-727,共5页
A simple harmonic motion is proposed to make the membrane move in a simpleharmonic way so as to enhance the membrane filtration, and minimize the membrane fouling andconcentration polarization. The velocity distributi... A simple harmonic motion is proposed to make the membrane move in a simpleharmonic way so as to enhance the membrane filtration, and minimize the membrane fouling andconcentration polarization. The velocity distribution and pressure distribution are deduced from theNavier-Stokes equation on the basis of a laminar flow when the membrane rotates at the speed of Asin(αt). And then the shear stress, shear force, moment of force on the membrane surface and powerconsumed by viscous force are calculated. The velocity distribution demonstrates that the phase ofmembrane velocity does not synchronize with that of shear stress. The simple harmonic motion canresult in self-cleaning, optimize energy utilization, provide the velocity field with instability,and make the feed fluid fluctuation. It also results in higher shear stress on the membrane surfacethan the constant motion when they consume the same quantitative energy. 展开更多
关键词 rotating membrane filter FOULING micro-filtration dynamic filtration simple harmonic
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