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5510Vol5510200410JournalofChemicalIndustryandEngineering(China)October2004白宇张杰陈淑芳阎立龙(,150090),,,,30%.,q(x)=x0m(x)n(x)dxx,.,,.V7031A0438-1157(2004)10-1690-06BIOMASSANDMICROBIALACTIVITYINBACKWASHEDBIOFILTERBAIYu,ZHANGJie,CHENShufangandYANLilong(SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,Heilongjiang,China)AbstractBiomassandmicrobialactivitywereinvestigatedinbackwashingprocessesofabiofilterfortertiarytreatment.Themicrobialgroupsrevealedanewdistributionalongthebiofilterdepthafterlowflowratebackwashingforashorttime.Thenthestartupprocesswasacceleratedbybackwashing.Thebiomassprofileandmicrobialactivityprofile,bothvaryingwithdepth,canbemathematicallydescribedbyquadraticequations.Usingtheprofiles,thedemandofoxidationcanbecalculatedtodeterminetheairflowrateinabackwashing.Combinedwiththedifferencebetweenbiofilterandrapidgravityfilters,analysisofbiomassandmicrobialactivitycandeterminetherequiredairflowrateinabackwashingmoreaccurately.Keywordsbackwashing,biomass,microbialactivity,demandofoxidation2003-08-14,2003-09-28.:,,28,.,2080,.[1].,Receiveddate:2003-08-14.Correspondingauthor:BAIYu,PhDcandidate.E-mail:baiyu75322@163com,,[2].,,.[3].1,.,,,.,,.,,,.Findlay,,,90%~98%,(),nmolP!cm-3!media-1,1nmolP(Ecoli)108[4].UrferBRP[5].11,,.1.Fig1Pilotapparatus12,,.1m!h-1,,.3∀1.,[6],,,.2212,5,2,,20%;6,1(1#),,,,8,30%,11CODCr30%.,,30%.Fig2ChangeofCODCrconcentrationininfluentandeffluentanditsremovalratewithdate#influent;∃effluentof1#biofilter;%effluentof2#biofilter,.3,,,.,60cm20~30nmolP!cm-3!media-1,,,.,!1691!5510:,,3,,,.Fig3Biomassalongprofileofbiofilter#afterbackwashing;&beforebackwashing3,1#,,,,CODCr,.,,,,,,.,,,,,,3m,,75L!m-2!s-1,1~2min.22,,,.,..4.4,,.,.,,.,,,,,,,.,.Fig4Changeofexpandingrateoffilterwithdifferentairpressuresduringbackwashing#beforestartup;&afterstartup23,.,nmolP!cm-3!media-1,mgO2!L-1!(nmolP)-1,mgO2!L-1!cm-3!media-1,.,,,,3hCODCr80%.,,,()3.3h80cm,33g.!1692!2004105,,,14mgO2!L-1!cm-3!media-1.,.,.Fig5Demandofoxidationbeforeandafterbackwashing&beforebackwashing;#afterbackwashing,,94L!m-2!s-1,,94L!m-2!s-1,,.94L!m-2!s-1,,.,.94L!m-2!s-1,.246.Fig6Changesofbiomassandmicrobialactivityalongprofileofbiofilter#biomass;µbialactivity,,,80cm.,[7]Tha=12DeSkOV12(1)(1),,,..,.,,.,,,.,,,,[8].,.7,,,,50%.,.,,[9],.8,.9L!m-2!s-1,.Fig7Changeofbiomassalongbiofilterwithdifferentairpressuresduringbackwashing#7L!m-2!s-1;∃9L!m-2!s-1;11L!m-2!s-1;∋13L!m-2!s-1!1693!5510:Fig8Changeofmicrobialactivityalongbiofilterwithdifferentairpressuresduringbackwashing#7L!m-2!s-1;∃9L!m-2!s-1;11L!m-2!s-1;|13L!m-2!s-125,.,5,.m(x)=a1x2+b1x+c1(2)n(x)=a2x2+b2x+c2(3)(2)(3),a1,b1,c1,a2,b2,c2.q(x)=x0m(x)n(x)dxx=x0(a1x2+b1x+c1)(a2x2+b2x+c2)dxx(4)x(cm).791113L!m-2!s-1,m7(x)m9(x)m11(x)m13(x),n7(x)n9(x)n11(x)n13(x).(4),4,200cm.9(4),.9,80cm,80cm.,,.9,5,10L!m-2!s-1,594L!m-2!s-1.Fig9Averagedemandoxidationofbiofilterbeforeandafterbackwashing&beforebackwashing;#afterbackwashing3(1),,,,30%.(2),....,3h,,.,;,,..,94L!m-2!s-1.De(((,L2T-1!1694!200410kOV(((,ML-3T-1S(((,ML-3Tha(((,L(((References1LiuXibo,PeterMHuck,RobinMSlawson.FactorsAffectingDrinkingWaterBiofiltration.AmericanWaterandWastewaterAssociation,2001,90(12):90(1012LiuY,ChenGH.AModelofEnergyUncouplingforSubstratesufficientCulture.Biotechnol.Bioeng,1997,55:571(5763CaoHongbin(),JiangBin(),LiXingang(),YuGuocong(),ZhongFangli().NovelMethodExtractingExtracelluarPolymericSubstancesfromIntactBiofilms.JournalofChemicalIndustryandEngineering(China)(),2002,53(12):1300(13024YuXin(),ZhangXiaojian(),WangZhansheng().BiomassExaminationbyLipidpMethodforDrinkingWaterBiotreatment.ChinaWaterandWastewater(),2002(2):18(215DanielUrfer,PeterMHuck.MeasurementofBiomassActivityinDrinkingWaterBiofiltersUsingaRespirometricMethod.Wat.Res,2001,35(6):1469(14776YuanJunfeng(),LiShanping().NewHangingBiomembranceMehodofBiologicalAeratedFilter.EnvironmentalEngineering(),2003,21(2):22(257CapdevilleB,NguyenKM.KineticsandModeling:ofAerobicandAnaerobicFilmGrowth.Wat.Sci.Technol,1990,22:149(1708KennethHCarlson,GaryLAmy.BOMRemovalDuringBiofiltration.AmericanWaterandWastewaterAssociation,1998,90(12):42(509LiuY.AdhesionKineticsofNitrifyingBacteriaonVariousThermoplasticSupports.ColloidsandSurfacesB:Biointerfaces,1995(5):213(2192003~2007,,()1030~31,1120~21)∗,,,,,(((,,,,,,,:51,/:100010::010-65281206813,65281835,65281735:010-65281705E-mail:cuigx@hepcomcn!1695!5510: