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题名: Biofouling in ultrafiltration process for drinking water treatment and its control by chlorinated-water and pure water backwashing
作者: Shao, Senlin1, 2; Wang, Yue3; Shi, Danting1; Zhang, Xuezhi4; Tang, Chuyang Y.5; Liu, Zizheng1; Li, Jiangyun1, 2
关键词: Biofouling ; Ultrafiltration ; Drinking water treatment ; Ammonia ; Backwashing
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
发表日期: 2018-12-10
DOI: 10.1016/j.scitotenv.2018.06.220
卷: 644, 页:306-314
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: We investigated biofouling in ultrafiltration (UF) for drinking water treatment and its control by backwashing with chlorinated-water or pure water. By using sodium azide to suppress biological growth, the relative contribution of biofouling to total fouling was estimated, and its value (5.3-56.0%) varied with the feed water, and increased with the increases of filtration time and membrane flux. The biofouling layer could partially remove biodegradable organic matter and ammonia (32.9-74.2%). Backwashing using chlorinated-water partly inactivated the microorganisms (23.8%) but increased the content of extracellular polymeric substances (7.7%) in the biofouling layer. In contrast, backwashing using pure water led to a looser and more porous fouling layer according to optical coherence tomography observation. Consequently, the latter was more effective in reducing fouling resistance (33.41% reduction) compared to backwashing by chlorinated-water (8.6%). These findings reveal the critical roles of biofouling in pollutants removal in addition to membrane permeability, which has important implications for addressing seasonal ammonia pollution. (C) 2018 Published by Elsevier B.V.
关键词[WOS]: EXTRACELLULAR POLYMERIC SUBSTANCES ; OPTICAL COHERENCE TOMOGRAPHY ; LOW PRESSURE ULTRAFILTRATION ; ADENOSINE-TRIPHOSPHATE ATP ; MEMBRANE FILTRATION ; ORGANIC-MATTER ; PERMEATE FLUX ; MECHANISMS ; MICROFILTRATION ; DISINFECTION
语种: 英语
项目资助者: Natural Science Foundation of China(51608396 ; China Postdoctoral Science Foundation(2016M592386 ; Open Project of State Key Laboratory of Urban Water Resource and Environment(HC201709) ; Innovation project for water conservancy in Guangzhou province(2017-33) ; 51508423) ; 2017T100578)
WOS记录号: WOS:000445164000031
ISSN号: 0048-9697
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/56147
Appears in Collections:水生生物分子与细胞生物学研究中心_期刊论文

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作者单位: 1.Wuhan Univ, Sch Civil Engn, Wuhan 430072, Hubei, Peoples R China
2.Wuhan Univ, Engn Res Ctr Urban Disasters Prevent & Fire Rescu, Wuhan 430072, Hubei, Peoples R China
3.Tongji Univ, Coll Environm Sci & Engn, Shanghai 200092, Peoples R China
4.Chinese Acad Sci, Inst Hydrobiol, Ctr Microalgal Biotechnol & Biofuels, Wuhan 430072, Hubei, Peoples R China
5.Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China
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