胞外聚合物对浸没式膜_生物反应器膜过滤性能的影响_王雪梅

王雪梅,刘燕,华志浩,等.胞外聚合物对浸没式膜-生物反应器膜过滤性能的影响[J].环境科学学报,2005,25(12):1602-1607WANGXuemei,LIUYan,HUAZhihao,etal.EffectofextracellularpolymericsubstancesinSMBRonmembranefiltration[J].ActaScientiaeCircumstantiae,2005,25(12):1602-1607胞外聚合物对浸没式膜-生物反应器膜过滤性能的影响王雪梅,刘燕＊,华志浩,郭国良复旦大学环境科学与工程系,上海200433收稿日期:2005-04-12修回日期:2005-08-28录用日期:2005-09-04摘要:通过浸没式膜-生物反应器(SMBR)处理上海市城市内河水的试验,研究了反应器混合液中和2种疏水性不同的膜上污泥胞外聚合物(EPS)的量、组成、污泥特性及对膜过滤性能的影响.结果表明,混合液污泥中的溶解性EPS和固着性EPS比膜上污泥多,不同污泥的固着性EPS组分中蛋白质(EPSP)多糖(EPSC)的大小顺序依次为混合液污泥<亲水膜污泥<疏水膜污泥.疏水膜污泥中溶解性EPS比亲水膜多,溶解性EPS和固着性EPS量及组分均有很大差异.混合液污泥的EPS流动性大,疏水性膜上污泥EPS的流动性较大.溶解性EPS对污泥特性及膜过滤性能影响较大.SMBR中亲、疏水性膜片上黏附的污泥的相对疏水性分别为53%、59%.比较2种膜片通量的变化发现,疏水性膜污染严重.关键词:浸没式膜-生物反应器;胞外聚合物;膜污染;亲水性膜;疏水性膜文章编号:0253-2468(2005)12-1602-06中图分类号:X703文献标识码:AEffectofextracellularpolymericsubstancesinSMBRonmembranefiltrationWANGXuemei,LIUYan＊,HUAZhihao,GUOGuoliangDepartmentofEnvironmentalScienceandEngineering,FudanUniversity,Shanghai200433Received12April2005;receivedinrevisedform28August2005;accepted4September2005Abstract:Thispaperinvestigatedtheamountandcompositionofextracellularpolymericsubstances(EPS)inactivatedsludgefrommixedliquoraswellasthoseinsludgesfromahydrophilicandahydrophobicmembrane,respectively,inaSubmergedmembranebioreactor(SMBR)treatingriverwaterinShanghai,andanalyzedthecharacteristicsofthesesludges.TheeffectofEPSandsludgehydrophobicityonfiltrationofmembranewasstudied.TheexperimentresultsshowedthattotalamountofEPSinsludgefrommixedliquorwasmorethanthosefrommembranesurface,andtheratioofEPSPEPSCrankedmixedliquor