期刊
BIORESOURCE TECHNOLOGY
卷 138, 期 -, 页码 38-47出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.03.129
关键词
Membrane bioreactor; Powdered activated carbon (PAC); Size of the PAC; PAC replacement rate; Sludge retention time (SRI)
资金
- Agency of Science, Technology and Research of Singapore (A*STAR)
- Environment and Water Industry Development Council
It was found that with replenishment, powdered activated carbon (PAC) in the membrane bioreactor (MBR) would develop biologically activated carbon (BAC) which could enhance filtration performance of a conventional MBR. This paper addresses two issues (i) effect of PAC size on MBR (BAC) performance; and (ii) effect of sludge retention time (SRT) on the MBR performance with and without PAC. To interpret the trends, particle/floc size, concentration of mixed liquor suspended solid (MLSS), total organic carbon (TOC), short-term filtration properties and transmembrane pressure (TMP) versus time are measured. The results showed improved fouling control with fine, rather than coarse, PAC provided the flux did not exceed the deposition flux for the fine PAC. Without PAC, the longer SRT operation gave lower fouling at modest fluxes. With PAC addition, the shorter SRT gave better fouling control, possibly due to greater replenishment of the fresh PAC. (C) 2013 Elsevier Ltd. All rights reserved.
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