Indexed by:Journal Article

Date of Publication:2012-01-01

Journal:BIORESOURCE TECHNOLOGY

Included Journals:EI、SCIE

Volume:103

Issue:1

Page Number:43-47

ISSN:0960-8524

Key Words:Hybrid anoxic-oxic MBR; Membrane fouling; Start-up period; Activated sludge properties; Denaturing gradient gel electrophoresis

Abstract:In MBR, severe membrane fouling is often observed in the initial phase in which biomass is yet fully acclimated and stabilized in terms of microbial community structure and biomass characteristics. The focus of this study was to investigate the microbial community development and its influence on biomass characteristics and membrane fouling during start-up of a hybrid anoxic-oxic MBR. PCR-DGGE analysis indicated that the microbial community shifted in start-up period when a severe membrane fouling was observed. Small particle size, high fractal dimension (DF) and high EPS production, which were closely associated with microbial community, were found to be the major contributors to the severe fouling. Microbial community development was most likely the ultimate factor responsible for the severe membrane fouling. (C) 2011 Elsevier Ltd. All rights reserved.