Fouling Characteristics and Prevention Techniques for Membrane Bioreactor  

作　　者：LUHua WANGZhi-qiang YANGJin-ying 

机构地区：[1]SchoolofResourceandSafetyEngineering,ChinaUniversityofMining＆Technology,Beijing100083,China [2]ShanHai-guanDrainageAdministrationBureau,Qinhuangdao,Hebei066200,China

出　　处：《Journal of China University of Mining and Technology》2005年第1期36-40,共5页中国矿业大学学报（英文版）

摘　　要：Membrane fouling is the main problem of membrane bioreactors (MBR), which seriously influ- ences its wastewater treatment effect and running. The characteristics of microbiology and hydrodynamics concerning membrane fouling were investigated and the measure was put forward for optimum operation of MBR. The measure is that 1) the parameters of activated sludge concentration (X) and membrane flux should be lower than the critical values of X and membrane flux respectively, and 2) the activated sludge should be discharged periodically. The experimental results show that the combination backwashing of gas and perme- ated effluent is better than single gas backwashing or single permeated effluent backwashing. This technique can remove the cake layer deposited on the membrane surface, decrease the membrane fouling, and recover the membrane flux effectively. So it is effective for prevention of membrane fouling.Membrane fouling is the main problem of membrane bioreactors (MBR), which seriously influ- ences its wastewater treatment effect and running. The characteristics of microbiology and hydrodynamics concerning membrane fouling were investigated and the measure was put forward for optimum operation of MBR. The measure is that 1) the parameters of activated sludge concentration (X) and membrane flux should be lower than the critical values of X and membrane flux respectively, and 2) the activated sludge should be discharged periodically. The experimental results show that the combination backwashing of gas and perme- ated effluent is better than single gas backwashing or single permeated effluent backwashing. This technique can remove the cake layer deposited on the membrane surface, decrease the membrane fouling, and recover the membrane flux effectively. So it is effective for prevention of membrane fouling.

关 键 词：membrane bioreactor (MBR) membrane fouling membrane fouling index BACKWASHING ratio  of gas to permeated effluent 

分 类 号：X703[环境科学与工程—环境工程]