Aerobic membrane bioreactor(MBR) has been widely used in Municipal Wastewater Treatment Plants because of the improved requirement for effluent quality. However, the application of MBR would have a great impact on the properties of the waste activated sludge(WAS). The anaerobic digestibility of the WAS discharged from large-scale MBRs was studied. A cross-flow anaerobic membrane bioreactor(AnMBR) was constructed for the treatment of MBR's WAS. The membrane fouling control and cleaning methods were studied a...