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	Using inorganic coagulants to control membrane fouling in a submerged membrane bioreactor
	Wu, Jinling ; Chen, Futai ; Huang, Xia ; Geng, Wenyan ; Wen, Xianghua
	2010-05-10 ; 2010-05-10
关键词	polymeric coagulant specific filtration resistance submerged membrane bioreactor membrane fouling supernatant organics charge neutrality POWDERED ACTIVATED CARBON WASTE-WATER TREATMENT CROSS-FLOW SLUDGE MICROFILTRATION PERFORMANCE OPERATION FILTRATION SUSPENSION FLUX Engineering, Chemical Water Resources
中文摘要	Changes of properties (specific filtration resistance, floc size, supernatant TOC and zeta potential) of activated sludge mixed liquor after monomeric and polymeric coagulants [Al-2(SO4)3, FeCl3, PAC (polymeric aluminum chloride) and PFS (polymeric ferric sulfate)] addition were studied in this paper. It was found that polymeric coagulants had a better effect on filterability enhancement of mixed liquor than monomeric coagulants. Further research found that the reason was that polymeric coagulants could supply more positive charges for organic particles and sludge flocs, and enhance the functions of charge neutralization, which resulted in higher removal of supernatant organic matter and enlargement of sludge floc size. Thus, polymeric coagulants (PAC, PFS and PAFC) were added in a submerged membrane bioreactor (MBR) and the effect on membrane fouling control was investigated. It was found that polymeric coagulants could control membrane fouling by reducing the initial TMP and the TMP increase rate. Three functions of polymeric coagulants on membrane fouling control were supposed: restraining the formation of gel layer, decelerating the development of foulants and removing stable foulants from the membrane surface. Among the selected coagulants, PFS was the most effective in controlling membrane fouling and the optimal dose was 1.05 mM Fe. If coagulant was added before the MBR was run, a better effect could be obtained.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE BV ; AMSTERDAM ; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/23282]
专题	清华大学
推荐引用方式 GB/T 7714	Wu, Jinling,Chen, Futai,Huang, Xia,et al. Using inorganic coagulants to control membrane fouling in a submerged membrane bioreactor[J],2010, 2010.
APA	Wu, Jinling,Chen, Futai,Huang, Xia,Geng, Wenyan,&Wen, Xianghua.(2010).Using inorganic coagulants to control membrane fouling in a submerged membrane bioreactor..
MLA	Wu, Jinling,et al."Using inorganic coagulants to control membrane fouling in a submerged membrane bioreactor".(2010).

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