污泥特性对膜生物反应器处理生活污水效果的影响分析  

Influences of Sludge Characteristics on Operation Efficiency of Membrane Bioreactor

作　　者：徐静[1] 徐高田[2] 董黎静[1] 

机构地区：[1]上海大学环境科学与工程系,上海200072 [2]上海市环境保护局,上海200050

出　　处：《中北大学学报（自然科学版）》2009年第5期457-461,共5页Journal of North University of China(Natural Science Edition)

基　　金：上海市中新国际合作项目(042307013)

摘　　要：污泥浓度是膜生物反应器(MBR)设计运行中的重要参数,对反应器的运行效果有着较大的影响.通过缩短水力停留时间(HRT)、延长污泥龄(SRT),考察了MBR中污泥的增长规律,不同污泥浓度下进、出水CODCr的变化情况,容积负荷Nv与污泥负荷Ns对CODCr去除率的影响.结果表明:MBR反应器中属于混合液悬浮固体(MLSS)的污泥浓度随着水力停留时间(HRT)的缩短、污泥龄(SRT)的延长不断增长,但污泥活性有所降低;污泥表观产率Yobs随着时间的延长有所降低;反应器的容积负荷随着HRT的减少而增加,污泥负荷始终处于一个较低的水平;随着污泥负荷和容积负荷的增加,CODCr的去除率始终保持在90%以上,说明反应器具有良好的抗冲击负荷能力.Sludge concentration is one of the important parameters for membrane bioreactor （MBR）. It influences the removal efficiency of the reactor. This paper investigates the increasing rule of sludge concentration by shortening hydraulic retention time （HRT） and increasing sludge retention time （SRT）, investigates the changes of CODCr in the influent and the effluent under the different sludge concentration, and investigates the influences of volumetric loading and sludge loading on the treatment effects of CODCr. The result shows that the concentration of sludge with mixed liquor suspened solid （MLSS） feature is increased with the decrease of HRT and the increase of SRT, but the sludge activity is evaluated at the same time. The sludge yield coefficient is reduced with the increase of SRT. The volumetric loading is increased with the decrease of HRT. The removal rate of CODCr keeps over 90%, which indicates that the MBR has favorable ability of shock loading resistance.

关 键 词：膜生物反应器 污泥浓度 混合液悬浮固体 污泥产量 

分 类 号：X703.3[环境科学与工程—环境工程]