Effect of substrate composition (C/N/P ratio) on microbial community and membrane fouling tendency of biomass in membrane bioreactors

Bing Wu, Shan Yi, Anthony G. Fane

Rannsóknarafurð: Framlag til fræðitímaritsGreinritrýni

14 Tilvitnanir (Scopus)

Útdráttur

In this study, biomass characteristics including bacterial community, extracellular polymeric substances (EPS) production, and membrane fouling propensity were examined when the membrane bioreactors (MBRs) were fed with different substrates (i.e., different C/N/P ratios). Denaturing gradient gel electrophoresis (DGGE) analysis revealed that significant shifts of bacterial communities happened when increasing nitrogen or phosphorus loading in the MBRs, which followed in an almost similar way. At steady state, the biomass from the low C/N- and C/P-MBRs had comparable concentrations and produced similar EPS levels as those in the control MBR. However, the median particle size increased when the MBRs fed with low C/N- or C/P- substrate, possibly associated with the filamentous bacteria propagating in the MBRs. Increasing nitrogen or phosphorus loading 1-fold could not induce more serious membrane fouling compared to the control MBR.

Upprunalegt tungumálEnska
Síður (frá-til)440-445
Síðufjöldi6
FræðitímaritSeparation Science and Technology
Bindi47
Númer tölublaðs3
DOI
ÚtgáfustaðaÚtgefið - feb. 2012

Athugasemd

Funding Information:
The authors wish to thank the Agency for Science, Technology, and Research (A*STAR) of Singapore, for funding this project as part of the Temasek Professor (Professor Anthony G. Fane) Programme in Membrane Technology for Sustainable Water. The Environment and Water Industry Development Council is also acknowledged for funding Singapore Membrane Technology Centre, which supported the completion of this work. The authors also extend their gratitude to Professor Darren Sun and the late Professor Stephen Tiong-Lee Tay.

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