标题：A comparison study on membrane fouling in a sponge-submerged membrane bioreactor and a conventional membrane bioreactor
作者：Deng, Lijuan; Guo, Wenshan; Ngo, Huu Hao; Zhang, Jian; Liang, Shuang; Xia, Siqing; Zhang, Zhiqiang; Li, Jianxin
通讯作者：Ngo, Huu Hao
作者机构：[Deng, Lijuan; Guo, Wenshan; Ngo, Huu Hao] Univ Technol Sydney, Sch Civil & Environm Engn, Ctr Technol Water & Wastewater, Broadway, NSW 2007, Austral 更多
会议名称：International Conference on Advances in Biotechnology and Bioinformatics
会议日期：NOV 25-27, 2013
关键词：Submerged membrane bioreactor; Sponge; Attached growth; Membrane; fouling; Cake layer
摘要：This study compared membrane fouling in a sponge-submerged membrane bioreactor (SSMBR) and a conventional membrane bioreactor (CMBR) based on sludge properties when treating synthetic domestic wastewater. In the CMBR, soluble microbial products (SMP) in activated sludge were a major contributor for initial membrane fouling and presented higher concentration in membrane cake layer. Afterwards, membrane fouling was mainly governed by bound extracellular polymeric substances (EPS) in activated sludge, containing lower proteins but significantly higher polysaccharides. Sponge addition could prevent cake formation on membrane surface and pore blocking inside membrane, thereby alleviating membrane fouling. The SSMBR exhibited not only less growth of the biomass and filamentous bacteria, but also lower cake layer and pore blocking resistance due to lower bound EPS concentrations in activated sludge. Less membrane fouling in SSMBR were also attributed to larger particle size, higher zeta potential and relative hydrophobicity of sludge flocs. (C) 2014 Elsevier Ltd. All rights reserved.