膜-生物反应器中荧光物质对膜污染的影响

第23卷�第4期2010年4月环�境�科�学�研�究ResearchofEnvironmentalSciencesVo.l23,No.4Apr.,2010膜-生物反应器中荧光物质对膜污染的影响朱宇峰1,王志伟1*,吴志超1,唐书娟1,王�旭21.同济大学环境科学与工程学院,上海�2000922.上海子征环境技术咨询有限公司,上海�200092摘要:采用三维荧光(EEM)技术对膜-生物反应器(MBR)运行过程中进出水、膜面溶解性污染物、溶解性微生物(SMP)和胞外聚合物(EPS)进行分析,并对各运行条件下荧光强度与膜污染速率进行比较.结果表明:各工况膜污染顺序为工况1(0�55kPa�d)<工况3(1�37kPa�d)<工况2(1�71kPa�d)<工况4(3�69kPa�d),SMP中的类蛋白质和类富里酸,以及EPS中的类蛋白质和类腐殖酸,均与各工况膜污染速率呈一致的变化趋势,而膜面溶解性污染物中的类蛋白质荧光峰则与膜污染速率没有明显的关系,说明在膜表面积累的荧光物质可能与其他有机物共同作用影响了膜污染速率.关键词:膜-生物反应器(MBR);膜污染;三维荧光;溶解性微生物(SMP);胞外聚合物(EPS)中图分类号:X703���文献标志码:A���文章编号:1001-6929(2010)04-0510-05InfluenceofFluorescentSubstancesonMembraneFoulinginMembraneBioreactors(MBR)ZHUYu�feng1,WANGZhi�wei1,WUZhi�chao1,TANGShu�juan1,WANGXu21.SchoolofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai�200092,China2.ShanghaiZizhengEnviromentalTechnologyConsultingCo.,Ltd.,Shanghai�200092,ChinaAbstract:Theinfluentandeffluentwater,solublemembranefoulants,solublemicrobialproducts(SMP)andextracellularpolymericsubstances(EPS)inmembranebioreactors(MBR)wereanalyzedusingthree�dimensionalfluorescencespectrum.ThefluorescenceintensityofthesamplesandthemembranefoulingratesfromfourMBRrunswithdifferentoperationconditionswerecompared.TheincreasingorderofthefoulingrateofeachrunwasRun1(0�55kPa�d),Run3(1�37kPa�d),Run2(1�71kPa�d),Run4(3�69kPa�d).Theresultsindicatedthatprotein�likesubstancesinbothSMPandEPS,fuvic�likesubstancesinSMP,andhumic�likesubstancesinEPSshowedthesametrendoffoulingrateineachrun.Meanwhile,thefluorescenceintensityoffulvicacidsinSMPandhumicacidsinEPSpositivelyrelatedtomembranefoulingrate.However,thefluorescencespectrumofprotein�likesubstancesinsolublemembranefoulantshadnosimilartrendwiththemembranefoulingrate,indicatingthattheremightbeotherorganicmatters,andthatthefluorescentsubstancesdepositedonthesurfaceofthemembrane,co�influencingmembranefoulingrate.Keywords:membranebioreactor(MBR);membranefouling;three�dimensionalfluorescencespectrum;solublemicrobialproducts(SMP);extracellularpolymericsubstances(EPS)收稿日期:2009-0