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38320103()JOURNALOFTONGJIUNIVERSITY(NATURALSCIENCE)Vol.38No.3 Mar.2010:0253-374X(2010)03-0403-04DOI:10.3969/j.issn.0253-374x.2010.03.016:2008-12-17:(07dz22019,08DZ2290602);(2008C10023);: (1978—),,,,.E-mail:tjdongbin@163.com董 滨1,2,段妮娜1,何群彪1(1.,200092;2.,315100):4(membranebioreactors,MBR)(solublemicrobialproducts,SMP).,SMP;MBRSMP;SMP,;SMPMBR,.,SMP,,.:;;:X172 :AMembraneFoulingBehaviorsofSolubleMicrobialProductsatVariousSludgeRetentionTimesDONGBin1,2,DUANNina1,HEQunbiao1(1.CollegeofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai20092,China;2.NingboInstituteofTechnology,ZhejiangUniversity,Ningbo315100,China)Abstract:Thecharacteristicsandbehaviorsofsolublemicrobialproducts(SMP)inmembranebioreactors(MBRs)wereinvestigatedatvarioussludgeretentiontimes(SRTs)byfourparalleledlaboratory-scaleMBRs.ThefoulingpotentialofSMPandtheextentofSMPaccumulationwerefoundtosignificantlyincreasewithdecreasingSRT.Themolecularweight(MW)distributionsofSMPgenerallyexhibitedabimodalpatternwithhighMWcomponentsbecamemoreevidentatlongSRTs.SimilarmolecularweightdistributionsofSMPinMBRsandineffluentswereobserved.CarbohydrateappearedmorepronetoaccumulateinMBRsthanProtein,especiallyatshortSRTs.Resultsabovesuggestthatinacomparisonofthetendencytocausemembranefouling,carbohydrateishigherthanprotein,andcomponentsofSMPwithlargermolecularweightappeartohavehighertendencythanthatwithsmallermolecularweight.Keywords:solublemicrobialproducts(SMP);membranefouling;membranebioreactor(MBR) ,(membranebioreactors,MBR),,.MBR,,,[1].,MBR.,[2-4],(SMP)[5-6].(solublemicrobialproducts,SMP),[7-9].SMP,(),(),.,SMP(DOC),,、[10].SMPMBR.[11]MBRSMP,SMP,,.H.S.ShinS.T.Kang[12]SMP,SMP.SMPMBR. ()38 1 1.1 4MBR,10L,(1),,0.1μm,0.4m2,———,,.(ColePalmer,USA)MBR.,,10min,2min.1 MBRFig.1 Schematicdiagramofthelaboratory-scaleMBR1.2 .、、.COD600mg·L-1,m(COD)∶m(N)∶m(P)=100∶10∶1.,,SMP.,,[11-12].,MBRSMPDOC.1.3 (sludgeretentiontime,SRT)10,20,4060d,(2.86±0.97),(5.52±0.84),(9.35±1.08)(11.78±1.23)g·L-14.,MBR.MBR3～5.12h,pH7.5±0.5.40kPa,MBR,,.1.4 COD、、/(MLVSS/SS)(SOUR)[13].DOC1010(O.I.Analytical,USA).MBR4℃,8000r·min-115min,0.45μm,.-[14]SMP,.Lowry[15],(bovineserumalbumin,BSA).3,10,30kDaYM(Millipore,USA)SMP[4].JarusutthirakAmy[16],(Amicon,USA).MBR.60kPa,180r·min-1,.2 2.1 SMPMBRSMP(DOC)2.,SMP;MBRSMP10d40d,60d.MBR,MBRSMP.2 SMPFig.2 SMPconcentrationsandaccumulationsatdifferentSRTs ,MBRSMP404 3 ,: SMP,SMP,MBR.,SMP(MBRSMPSMP,ρMBR/ρe).,SMPSMP,4,SMPSMP.2.2 SMP,MBRSMP,3.SMP,,3kDaSMP52.0%～59.0%,30kDa25.0%～37.0%,3～30kDa4.0%～11.0%.10d60d,MBRSMP,SMP(30kDa)24.8%37.2%,,MBR,SMP,MBR,SMP.3 SMPFig.3 MWdistributionsofSMPatdifferentSRTs ,MBRSMP,SMP,SMP,.2.3 SMPSMP,.4,5,MBR,,SMP,,MBR,MBR.4 MBRFig.4 ProteinconcentrationsinMBRandineffluentsatdifferentSRTs5 MBRFig.5 CarbohydrateconcentrationsinMBRandineffluentsatdifferentSRTs SMP(DOC),MBR1.,SMP,MBR.SMP,10d33.2%60d24.2%,SMPMBR,MBR.,1,DOC,SMP,,,.405 ()38 1 SMP,MBRTab.1 PercentagesofproteinandcarbohydrateinSMPandtheratioofproteintocarbohydrateinMBRandineffluentsatdifferentSRTs/dm()m(SMP)/%MBRm()m(SMP)/%MBRm()m()MBR1036.1(±10.1)36.9(±13.4)33.2(±9.8)25.8(±12.6)1.09(±0.73)1.43(±0.17)2036.7(±9.3)37.3(±11.2)30.4(±8.2)24.6(±9.7)1.21(±0.11)1.51(±0.15)4035.3(±7.9)34.5(±9.6)28.5(±7.6)23.8(±7.8)1.24(±0.92)1.45(±0.12)6037.2(±8.5)36.4(±8.8)24.2(±6.5)20.5(±7.2)1.54(±0.16)1.78(±0.23) :();242.4 SMPSMP,6.DOC5mg·L-1,SMP.J0,.,4(DOC).,,,SMP,,SMP.6 MBRSMPFig.6 FoulingpotentialsofSMPinMBRandineffluentsatdifferentSRTs ,SMP,SMP.,SMP,SMP.Kimura[17]MBR.N.J.Jang[18]SMP,SMP10kDa,,SMP1kDa.,SMP,SMP,.,MBR,,.3 (1)MBRSMP,,SMPMBRSMP,SMP,SMP.(2)MBRSMP,SMP.SMP,10d60d,MBR,SMP,MBR,SMP.,SMP,SMP.(3)MBR,,SMP,SMP,10d33.2%60d24.2%,SMPMBR,SMPMBR,.(411)406 3,: [3] WangKS,SunCJ,YehCC.ThethermotreatmentofMSWincineratorflyashforuseasanaggregate:astudyofthecharacteristicsofsize-fractioning[J].ResourceConservationRecycle,2002,35(3):177.[4] WangKS,ChiangKY,PerngJK,etal.Thecharacteristicsstudyonsinteringofmunicipalsolidwasteincineratorashes[J].JHazardMater,1998,59(2/3):201.[5] ,,,.[J].,2006,34(2):229.ZHANGWensheng,SUITongbo,YAOYan,etal.Studyonpropertiesofincineratorashasacementadmixture[J].JournaloftheChineseCeramicSociety,2006,34(2):229.[6] ,,,.[J].,2008(9):1.HUANGJian,WUXiaomei,FANYueming,etal.Influenceofmunicipalsolidwasteincinerationflyashusingforcementrawmaterialoncementperformance[J].Cement,2008(9):1.[7] ,,.[M].:,1999.WANGYanmou,SUMuzhen,ZHANGLiang.Sulphoaluminatecement[M].Beijing:BeijingIndustryUniversityPress,1999.[8] ,,.[M].:,2006.DIAOJiangjing,XINZhijun,ZHANGQiuying.Productionandapplicationofsulphoaluminatecement[M].Beijing:ChinaBuildingMaterialIndustryPublishingHouse,2006.(406):[1] JuddS.TheMBRbook:principlesandapplicationsofmembranebioreactorsinwaterandwastewatertreatment[M].Oxford:Elsevier,2006.[2] GuoJF,XiaASQ,WangRC,etal.Studyonmembranefoulingofsubmergedmembranebioreactorintreatingbathingwastewater[J].JournalofEnvironmentalSciences,2008,20:1158.[3] DevendraPS,GiuseppeG,DanieleC,etal.Subcriticalfoulingbehaviourmodellingofmembranebioreactorsformunicipalwastewatertreatment:thepredictionofthet