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论文类型： 期刊论文

发表时间： 2009-12-01

发表刊物： BIORESOURCE TECHNOLOGY

收录刊物： SCIE、EI、PubMed、Scopus

卷号： 100

期号： 24

页面范围： 6655-6657

ISSN号： 0960-8524

关键字： Moving bed membrane bioreactor (MBMBR); Conventional membrane bioreactor (CMBR); Membrane fouling; Filamentous bacteria; Extracellular polymeric substances (EPS)

摘要： A membrane bioreactor filled with carriers instead of activated sludge named a moving bed membrane bioreactor (MBMBR) was investigated to minimize the effect of suspended solids on membrane fouling. The MBMBR and a conventional membrane bioreactor (CMBR) were operated in parallel for about two months. Unexpectedly, the rate of membrane fouling in MBMBR was about three times of that in CMBR. MBMBR showed a higher cake layer resistance than CMBR due to plenty of filamentous bacteria inhabited in suspended solids in MBMBR. Protein and polysaccharide contents of soluble EPS in MBMBR were obviously larger than those in CMBR. It could be speculated that the overgrowth of filamentous bacteria in MBMBR resulted in severe cake layer and induced a large quantity of EPS, which deteriorated the membrane fouling. (C) 2009 Elsevier Ltd. All rights reserved.