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1,2,2,1((1., 100085;2., 100084):(SFDM).,SFDM,35L·(m2·h)-1.,.,.0.5cm,10d,10cm,5h.,0.:;;;:TQ028.8 :A :0250-3301(2003)05-05-0065:(50178039):(1969～),,.:2002-09-27;:2002-11-21EffectsoftheWaterHead-DroponPerformanceoftheSelf-FormingBio-DynamicMembraneFanBin1,2,HuangXia2,LuanZhaokun1(1.StateKeyLaboratoryofEnvironmentalAquaticChemistry,Re-searchCenterforEco-EnvironmentalSciences,ChineseAcademyofSciences,Beijing 100085,China;2.StateKeyJointlaboratoryofEnvironmentSimulationandPollutionControl,DepartmentofEnvironmentalScienceandEngineer-ing,TsinghuaUniversity,Beijing 100084,China)Abstract:Toraisethewater-headdrop(WHD)isunbeneficialtotherecoveryoftheselfformingbio-dynamicmembrane(SFDM).WiththerisingoftheWHD,thestablefluxoftheSFDMgraduallyrisedtothemaximum,about35L·(m2·h)-1,butithadatrendtodeclineiftheWHDwasfurtherraised.ThedurationofthestablestageoftheSFDMde-clinedremarkablywiththeWHDbeingincreasedintherecoverystage.Thedurationofthestablestagewasmorethan10dwhentheWHDwas0.5cmintherecoverystage,butitwaslessthan5hwhentheWHDwas10cm.Thecausesofthesephenomenawereanalyzed.ItwasproposedthateachrunningcycleoftheSFDMbestartedattheWHDofzero.Keywords:selfformingbio-dynamicmembrane;waterhead-drop;filtrationperformance;membranebioreactor (selfformingbio-dynamicmembrane,SFDM)(),.-(SFDMBR),-,,、(5cm)、、[1,2].SFDMMBR.,(trans-membranepressure,TMP).SFDM,[2],SFDMTMP(,waterheaddrop,WHD).WHDSFDM.1 1SFDMBRSFDM,[1].WHD.WHD=10cm,8cm,6cm,4cm,2cm,0.5cm.24520039 ENVIRONMENTALSCIENCEVol.24,No.5Sep.,2003DOI:10.13227/j.hjkx.2003.05.012WHD=0.5cm.,,WHD0.WHD,.14.9L/(m2·h),WHD0.5cm.WHD:①WHD=10cm,,;②2,,,,,2;③,WHD;④,WHD2cm;⑤①～④,WHD=10cm,8cm,6cm,4cm,2cm.,WHD-0.2cm,WHD(WHD-0.2cm)～WHD,WHD.,.1 -Fig.1 SketchesofSFDMBR(a)andSFDMmodule(b),、、,.:COD150～400mg/L(188mg/L),NH3-N30～60mg/L(39mg/L),pH=6.7～7.5(7.2).3.5h,47d.4000～5000mg/L(4500mg/L),27℃.18m3/(m2·h)..14.9L/(m2·h)24h,2,,10L/h[40L/(m2·h)]..WHD,,,WHD.,Hatch2100NISTurbidimeter.2,210%.2 2.1 WHDSFDMWHD2.2,,WHD,.WHD,SFDM.SFDM.,SFDM.SFDM,.,SFDM,[3].,.,,SFDM.WHD,,.,[4,5],66 24.,,.,WHD,SFDM.2 Fig.2 Effectsofthehead-dropsontheeffluentturbidityintherecoverystages2.2 WHDWHD,3.,SFDM,.3,WHDSFDM,.,WHD10cm、6cm、2cm,SFDM10min、20min30min.,WHD,.,WHD=10cm,SFDM,10min.460minWHD.60min,.4,WHD.WHD,,WHD6cm;WHD,.WHD,,(limitingflux)[6].35L/(m2·h).3 Fig.3 Profilesoffluxvs.timeintherecoverystages4 Fig.4 Effectsofthewaterhead-droponthestablefluxWHD.WHD,.5WHD=10cm,.5,WHD=10cm,2～3h,,5h,.WHD,60min,14.9L/(m2·h).,,5L/(m2·h).,WHD(6).6,WHD=0.5cm,10d;675 WHD=2cm,1d,WHD1.7cm;WHD=10cm,5h,WHD9cm.5 WHD=10cmFig.5 ChangesoffluxwithtimeatWHD=10cm6 Fig.6 Effectsofthehead-dropsoftherecoverystagesontheperformanceofthestablestages,SFDM.,SFDM.,,,.SFDM.,90%[2].3-,.,,.,..,7[4].7l,f,d,y、、、.MBR,,FlFy.,Fy,.7 Fig.7 Actingforcesonasingleparticleincrossflowfiltration ,,WHD,,.,.WHD,.,.WHD,,,,WHD,.,,.6,60min,WHD,..8WHD()WHD().,,WHD=40mm.WHD,68 24.,WHD,.[7].WHD,SFDM,.2.,(7Fa).,.,.WHD,..842L/(m2·h),435L/(m2·h),.,.WHDWHD,[5].8 Fig.8 Effectsofthechangingprocessesofhead-droponthefluxesinstablestages3 (1)WHD,.(2)SFDMWHD,WHD,,WHD,SFDM.(3)WHDSFDM.(4)WHD0.WHD,WHD,,.,WHD=5cm.:1 ,,,.-.,2002,23(6):51～56.2 ,,,..,2003,24(1):91～97.3 BinFan,XiaHuang.CharacteristicsofSelf-FormingDynam-icMembraneCoupledwithBioreactorforMunicipalWastew-aterTreatment.Environ.Sci.Technol.,2002,36:5245.4 AltmannJ,RippergerS.Particledepositionandlayerforma-tionatthecrossflowmicrofiltration.J.Mem.Sci.,1997,124:119～128.5 ChenV,FaneAG,MadaeniS,WentenIG.Particledepo-sitionduringmembranefiltrationofcolloids:transitionbe-tweenconcentrationpolarizationandcakeformation.J.Mem.Sci.,1997,125:,109～122.6 AimarP,FieldRW.Limitingfluxinmembranesepara-tions:amodelbasedontheviscositydependencyofthemasstransfercoefficient.Chem.Eng.Sci.,1992,47(3):576～586.7 Gesan-GuiziouG,BoyavalE,DaufinG.Criticalstabilityconditionsincrossflowmicrofiltrationofskimmedmilk:tran-sitiontoirreversibledeposition.J.Mem.Sci.,1999,158:211～222.695