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Title:
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Microbial community developments and biomass characteristics in membrane bioreactors under different organic loadings.
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Author:
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Wu, Bing.; Yi, Shan.; Fane, Anthony G.
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Copyright year:
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2011 |
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Abstract:
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Microbial community developments and biomass characteristics (concentration, particle size, extracellular
polymeric substances (EPS), and membrane fouling propensity) were compared when three MBRs were fed
with the synthetic wastewater at different organic loadings. Results showed that the bacterial communities
dynamically shifted in different ways and the EPS displayed dissimilar profiles under various organic loadings,
which were associated with the ratios of food to microorganism and dissolved oxygen levels in the
MBRs. The membrane fouling tendency of biomass in the low-loading MBR (0.57 g COD/L day) was insignificantly
different from that in the medium-loading MBR (1.14 g COD/L day), which was apparently lower
than that in the high-loading MBR (2.28 g COD/L day). The membrane fouling propensity of biomass was
strongly correlated with their bound EPS contents, indicating cake layer fouling (i.e., deposition of microbial
flocs) was predominant in membrane fouling at a high flux of 30 L/m2 h. |
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Subject:
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DRNTU::Engineering::Environmental engineering::Water treatment. |
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Type:
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Journal Article |
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Series/ Journal Title:
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Bioresource technology |
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Research Centre:
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Singapore Membrane Technology Centre |
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Rights:
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© 2011 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Bioresource technology, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1016/j.biortech.2011.04.012] |
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Version:
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Accepted version |
