Document Detail


Osmotic pressure effect on membrane fouling in a submerged anaerobic membrane bioreactor and its experimental verification.
MedLine Citation:
PMID:  23026319     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
A laboratory-scale submerged anaerobic membrane bioreactor (SAnMBR) treating sewage was used to investigate the membrane fouling mechanism. Characterization of cake layer formed on membrane surface showed that cake layer was hydrated, rich of extracellular polymeric substances (EPS) and negative charged with the charge density of 0.21-0.46meq/kg MLSS. Detailed analysis revealed a new membrane fouling mechanism, osmotic pressure during cake layer filtration process due to the interception of ions. An osmotic pressure model was then developed to elaborate the existence of osmotic pressure and to estimate the contribution of osmotic pressure to membrane fouling. The calculated results showed that osmotic pressure accounted for the largest fraction of total operation pressure, indicating that osmotic pressure generated by the retained ions was one of the major mechanisms responsible for membrane fouling problem in MBRs. These findings provided a new insight into membrane fouling in MBRs.
Authors:
Jianrong Chen; Meijia Zhang; Aijun Wang; Hongjun Lin; Huachang Hong; Xiaofeng Lu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-19
Journal Detail:
Title:  Bioresource technology     Volume:  125C     ISSN:  1873-2976     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-10-2     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  97-101     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Ltd. All rights reserved.
Affiliation:
College of Geography and Environmental Sciences, Zhejiang Normal University, 688 Yingbin Avenue, Jinhua, Zhejiang Province 321004, PR China.
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