期刊
JOURNAL OF MEMBRANE SCIENCE
卷 401, 期 -, 页码 48-55出版社
ELSEVIER
DOI: 10.1016/j.memsci.2012.01.028
关键词
Membrane bioreactor (MBR); Solids retention time (SRT); Activated sludge filterability; Membrane fouling; Image analysis; Bioflocculation
资金
- Katholieke Universiteit Leuven [IDO/06/008, OT/10/035, PFV/10/002, SCORES4CHEM KP/09/005]
- IWT-O&O-MEMFICS-70406 project
- Belgian Program on Interuniversity Poles of Attraction
- KU Leuven Research Fund [PDMK/11/108]
- Institute for the Promotion of Innovation through Science and Technology in Flanders (IWT-Vlaanderen) [IWT SB-81355]
- MBR2+ project consortium
Membrane fouling remains a significant drawback for membrane bioreactors (MBRs). The solids retention time (SRT) has been widely acknowledged to be an important factor influencing membrane fouling. In general, lower membrane fouling rates are observed at elevated SRTs, however, the direct mechanisms through which a high SRT alleviates fouling are unclear. Since it has also been reported that activated sludge bioflocculation is an important factor in membrane fouling, this paper studies the impact of SRT on bioflocculation with respect to membrane fouling. A pilot-scale MBR was operated for more than two years at three different SRTs during which bioflocculation was closely monitored by means of an automated image analysis procedure while the fouling rate was recorded on-line for different fluxes and different filtration/relaxation cycles. In addition, the Delft filtration characterization method (DFCm) was employed to assess the activated sludge fouling propensity. Based on these data, it is shown that stable operation of a membrane bioreactor requires a good activated sludge condition and that bioflocculation is a crucial factor within that context. In the tested SRT range (10-30-50 days), a higher SRT contributes to better activated sludge bioflocculation and as a consequence, to lower fouling rates. (C) 2012 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据