EffectofextracellularpolymericsubstancesonthesludgemixedliquorcharacteristicsinsubmergedmembranebioreactorXiLijuan,ZhangHaifeng,ZhangYingjie(SchoolofChemistryEngineering,NortheastElectricPowerUniversity,Jilin132012,China),,(,132012)[](EPS)(SMBR)。,、、、。:SMBREPS、、。[];;;[]X703.3[]B[]1005-829X(2010)07-0032-04Abstract:Theeffectsofextracellularpolymericsubstances(EPS)onthesludgemixedliquorcharacteristicsofsub-mergedmembranebioreactor(SMBR)havebeenstudied.Duringtheexperimentalprocess,theviscosity,sedimenta-tioncapacity,relativecoagulanthydrophobicity,andmixedliquorfilterabilityofthesludgeareperiodicallymoni-tored.ExperimentalresultsshowthattheconcentrationofEPSaccumulatedinSMBRhasdirectinfluencesontheviscosity,sedimentationcapacity,relativehydrophobicityandmixedliquorfilterabilityofthesludge.Keywords:submergedmembranebioreactor;extracellularpolymericsubstances;relativehydrophobicity;filter-abilityofsludgemixedliquor[6],,.[M].:,2008:83-87.[7],.SBR[J].,2009,27(1):118-120.[8],.[J].,2004,27(2):93-95.[9]HongSP,BaeTH,TakTM,etal.Foulingcontrolinactivatedsludgesubmergedhollowfibermembranebioreactors[J].Desalina-tion,2002,143(3):219-228.[10]YoonSH,KangIJ,LeeCH.Foulingofinorganicmembraneandfluxenhancementinmembrane-coupledanaerobicbioreactor[J].Sep.Sci.Technol.,1999,34(5):709-724.[11],.[J].,2001,27(4):41-44.[](1986—),2009,。:15004613679,E-mail:longzhaomeng@126.com。[]2010-03-04()[](06FZZDSH00900);(MBR)。,,〔1〕;MBR,(EPS),!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!30720107IndustrialWaterTreatmentVol.30No.7Jul.,201032——2010-07,30(7)MBR〔2〕。EPS,,EPS,EPS()80%,50%~90%,15%,〔3-5〕。EPS,。V.Urbain〔6〕:EPS(SVI)。J.A.S.Goodwin〔7〕,A.C.Chao〔8〕:EPSSVI。S.M.Kang〔9〕,EPS,J.I.Houghton〔10〕EPS。MBR,EPS,MBR,。11.1(SMBR)1。15L,1(PVDF),0.2μm,0.15m2,,4.9kPa。,SMBR,2,350mL,,180r/min,,15s1,,PVDF,7.5cm,44.2cm2,0.2μm,30min。1.2MBR,,15d。,、、,MgSO4·7H2O、FeCl3·6H2O、CaCl2·2H2O、NaCl,TOC250~320mg/L、HRT4~5h、DO2~5mg/L、pH7±1、(18±2)℃,。1.3:MLSS、SVI〔11〕,NDJ-1()。NDJ-1,±5%。RH〔12〕:50mL4000r/min5min,0.1mol/LpH=7.260mL。(20kHz,80W)2min,。30mL,10min,30min。(1)RH:RH=(1-MLSSe/MLSSi)×100%(1):MLSSe———,mg/L;MLSSi———,mg/L。(EPS)〔13〕:,4000r/min5min,,,,80℃30min,5000r/min15min,0.45μm,EPS,(TOC),EPS。22.1EPSMBR,,,MBR〔14〕。,MBREPS。MBREPS,,。EPS2。PC1,:33——2010-07,30(7)2,EPS,,EPS(R2=0.98),(2):y=10.52e0.008x(2):y———,mPa·s;x———EPS,10-3。2.2EPSEPS,EPS。MBR,EPS〔15〕。EPS,,,EPS,EPSSVI3。3,EPS,MBREPS。EPS,,。3,EPS,,SVIEPS,(3):y′=0.0015x2+1.43x-1.38(3):y′———SVI,mL/g。(3),EPS;MBR,,,,,,,,EPS。2.3EPS,。EPS,,;,,EPSEPS,EPS,EPSRH4。,。-,。,。4,MBRRH45%~75%。,RHEPS,(R2=0.92),(4):RH=0.22x2+28.2(4)(4),EPS。,,。E.A.C.Emanuelsson〔16〕,,,,240220200180160140120100806080100120140160180200EPS/10-3SVI/(mL·g-1)3EPSSVIy′=0.0015x2+1.43x-1.38R2=0.96757065605550456080100120140160180200EPS/10-3RH/%4EPSRH=0.22x2+28.2R2=0.92605550454035302520156080100120140160180200EPS/10-3/(mPa·s)2EPSy=10.52e0.008xR2=0.9834——2010-07,30(7)。2.4EPSMBR,,EPS〔17〕。MBR,,,EPS,,。EPSRt5。5,EPS,Rt,。MBR,EPS,,,EPS,,,EPS,。EPS。R.McDonogh〔18〕,EPS。EPS,。EPS,,,,,,。3(1)MBREPS,,EPS,MBREPS。EPS,EPS,SVI。(2)MBREPS,EPS,;EPS,,。[][1],.“”[J].,2001,17(2):22-24.[2],,.[J].,2005,24(3):1-3.[3]NeyensE,BaeyensJ,DewilR,etal.Advancedsludgetreatmentaffectsextracellularpolymericsubstancestoimproveactivatedsludgedewatering[J].J.Hazard.Mat.,2004,106(2/3):83-92.[4]MagaraY,NumbuS,UtosawaK.Biochemicalandphysicalproper-tiesofanactivatedsludgeonsettlingcharacteristics[J].Wat.Res.,1976,10(1):71-77.[5]SaninFD,VesilindPA.Effectofcentrifugationontheremovalofextracellularpolymersandphysicalpropertiesofactivatedsludge[J].Wat.Sci.Tech.,1994,30(8):117-127.[6]UrbainV,BlockJC,ManemJ.Bioflocculationinactivatedsludge:ananalyticalapproach[J].Wat.Res.,1993,27(5):829-838.[7]GoodwinJAS,FormerCF.Afurtherexaminationintothecompo-sitionofactivatedsludgesurfacesinrelationtotheirsettlementcharacteristics[J].Wat.Res.,1985,19(4):527-533.[8]ChaoAC,KeinathTM.Influenceofprocessloadingintensityonsludgeclarificationandthickeningcharacteristics[J].Wat.Res.,1979,13(12):1213-1223.[9]KangSM,KishimotoM,ShioyaS,etal.Dewateringcharacteristicsofactivatedsludgesandeffectofextracellularpolymer[J].J.Fer-ment.Bioeng.,1989,68(2):l17-122.[10]HoughtonJI,QuarmbyJ,StephensenT.Municipalwastewatersludgedewatersabilityandthepresenceofmicrobialextracellu-larpolymer[J].Wat.Sci.Tech.,2001,44(2/3):373-379.[11].[M].3.:,1989:362-368.[12]WilenBM,JinB,LantP.Theinfluenceofkeychemicalcon-stituentsinactivatedsludgeonsurfaceandflocculatingproper-ties[J].Wat.Res.,2003,37(9):2127-2139.[13]MorganJW,ForsterCF,EvisonL.Acomparativestudyofthenatureofbiopolymersextractedfromanaerobicandactivatedsludge[J].Wat.Res.,1990,24(6):743-750.[14]TixierN,GuibaudG,BauduM.Determinationofsometheologicalparametersforthecharacterizationofactivatedsludge[J].Biore-sourceTechnology,2003,90(2):215-220.[15]ForfsterCF,Dallas-NewtonJ.Activatedsludgesettlement-somesuppositionsandsuggestion[J].Wat.Pollut.Control,1980,79(3):338-351.[16]EmanuelssonEAC,ArcangeliJP,LivingstonAG.Theanoxicextrac-tivemembranebioreactor[J].Wat.Res.,2003,37(6):1231-1238.[17]ZhangHaifeng,SunBaosheng,ZhaoXinhua,etal.Effectoffer-ricchlor