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Influence of mechanical mixing rates on sludge characteristics and membrane fouling in MBRs

Khan, S. Jamal, Visvanathan, C., Jegatheesan, V. and BenAim, R. 2008, Influence of mechanical mixing rates on sludge characteristics and membrane fouling in MBRs, Separation science and technology, vol. 43, no. 7, pp. 1826-1838, doi: 10.1080/01496390801974647.

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Title Influence of mechanical mixing rates on sludge characteristics and membrane fouling in MBRs
Author(s) Khan, S. Jamal
Visvanathan, C.
Jegatheesan, V.
BenAim, R.
Journal name Separation science and technology
Volume number 43
Issue number 7
Start page 1826
End page 1838
Total pages 13
Publisher Taylor & Francis Inc.
Place of publication Philadelphia, P.a.
Publication date 2008
ISSN 0149-6395
1520-5754
Keyword(s) membrane fouling
shear intensity
particle size distribution
extracellular polymeric substances (EPS)
specific cake resistance
Summary The influence of shear intensity (G) induced by mechanical mixing on activated sludge characteristics as well as membrane fouling propensity in membrane bioreactors (MBRs) was investigated. Four MBRs were operated at different mechanical mixing conditions. The control reactor (MBR0) was operated with aeration only supplemented by mechanical stirring at 150, 300, and 450 rpm in MBR150, MBR300, and MBR450, respectively. It was found that the MBR300 demonstrated minimum rate of membrane fouling. The fouling potential of the MBR300 mixed liquor was lowest characterized by the specific cake resistance and the normalized capillary suction time (CSTN). Moreover, it was found that the mean particle size reduced with an increase in the shear intensity. These results reveal that membrane fouling can be significantly mitigated by appropriate shear stress on membrane fibers induced by mechanical mixing condition.
Language eng
DOI 10.1080/01496390801974647
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©Taylor & Francis Group, LLC
Persistent URL http://hdl.handle.net/10536/DRO/DU:30039676

Document type: Journal Article
Collections: Faculty of Science, Engineering and Built Environment
School of Engineering
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Citation counts: TR Web of Science Citation Count  Cited 9 times in TR Web of Science
Scopus Citation Count Cited 11 times in Scopus Google Scholar Search Google Scholar
Access Statistics: 143 Abstract Views, 5 File Downloads  -  Detailed Statistics
Created: Thu, 27 Oct 2011, 08:59:10 EST

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