壳聚糖投加对MBR污泥混合液性质及膜污染的影响  

Effect of Chitosan Dosing on Sludge Mixed Liquor Characteristics and Membrane Fouling for MBR Processes

作　　者：王刚 杜兴治 王荣生 郭志义 蒋玲燕 王巧英[2] 

机构地区：[1]上海城投污水处理有限公司白龙港污水处理厂,上海201201 [2]同济大学环境科学与工程学院,上海200092

出　　处：《净水技术》2011年第6期31-35,共5页Water Purification Technology

基　　金：上海市科学技术委员会科研计划项目(10231201300)

摘　　要：通过试验研究了壳聚糖投加对膜-生物反应器中污泥混合液的颗粒粒径、污泥粘度、污泥脱水性能,溶解性微生物产物(SMP)及胞外聚合物(EPS)的影响。探讨了投加壳聚糖减缓膜污染的原因。结果表明投加壳聚糖提高了反应器对COD、TN、TP及NH3-N的去除效果。投加壳聚糖能够降低混合液粘度,增大污泥粒径,使污泥比阻值下降约80%。提高了污泥脱水性能,并降低了反应器中SMP的含量,从而降低了膜污染速率。Effect of dosing chitosan （CT） on characteristics of sludge mixed liquor such as sludge particle size, sludge viscosity, sludge dewaterability, soluble microbial products （SMP） and extracellular polymer substances （EPS） was investigated in the membrane hioreactor （MBR）. The reason that CT mitigated the membrane fouling was also discussed. The results show that dosing CT improves the removal efficiency of COD, TN, TP and NH3-N. CT can decrease sludge viscosity, increase sludge particle size, decrease value of sludge specific resistance by 80 %, improve sludge dewaterability and reduce SMP concentration, which leads to the mitigation of membrane fouling.

关 键 词：膜-生物反应器(MBR) 壳聚糖 污泥特性 溶解性微生物产物(SMP) 膜污染 

分 类 号：TU992.3[建筑科学—市政工程]