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:(No.2003AA306B01);(HBWDEP-2003-10);(2003xj21).:(1972-),,,,.E2mail:xqhu46@sohu.comABR1,2,3,11.,4300742.,4350023.,430073:ABR,.,ABRABR.ABR..RTD(residencetimedistribution)5.25LABR.:ABR,;;,13;(15cm);50.:ABR;;;.:X143:1000-2383(2004)03-0369-06:2003-09-29InfluenceofStructureonHydrodynamicCharacteristicsofAnaerobicBaffledReactorHUXi2quan1,2,LIUDa2yin3,CAIHe2sheng11.SchoolofEnvironmentalStudies,ChinaUniversityofGeosciences,Wuhan430074,China2.DepartmentofEnvironmentalandChemicalEngineering,HuangshiPolytechnicCollege,Huangshi435002,China3.DepartmentofEnvironmentalEngineering,WuhanInstituteofChemicalTechnology,Wuhan430073,ChinaAbstract:Toprovideguidanceforthestructuredesignofanaerobicbaffledreactor(ABR),astudyhasbeencarriedoutonthein2fluenceofstructureparameterssuchastheratioofwidthofdownflowchambertoupflowchamber,thedistanceofbaffletobot2tom,andthevalueoftheangleofbaffleonthehydrodynamiccharacteristicsoftheABR.Anaerobicbaffledreactorstypicalstruc2tureiscomposedofaseriesofidenticalunits.ThereactorshydrodynamiccharacteristicscanbededucedfromthecharacteristicsofasingleABRunit.Thispaperpresentsresidencetimedistributionstudiesontheinfluenceofstructureona5.25LcleanABRu2nit.Theresultsshowthatthefractionofdeadspaceislowercomparedtoothertypeanaerobicreactors,andthetypeofflowintheABRtendstowardsplug2flow.Thedataindicatethattheoptimalvalueoftheratioofwidthofdownflowchambertoupflowcham2beris13;thedistanceofbaffletobottomanddeadspaceisindirectproportiontotherangeofthisstudy(1-5cm);andtheop2timalvalueoftheangleofbaffleisabout50.Keywords:anaerobicbaffledreactor(ABR);structure;hydrodynamicchracteristics;deadspace.ABRMcCarty(Bachmannetal.,1983),,,,(SMPA),(Let2293Vol.29No.320045EarthScienceJournalofChinaUniversityofGeosciencesMay2004tingaetal.,1997;,2000;,2001).ABR,,.(Vd/V)(D/uLPeclet).GrobickiandStuckey(1992)ABR,ABR.,HRT,HRT.(1997)HRTABR,.ABRABR.ABR,.1ABR,1ABR.ABR(2,3,4),,,ABR.ABR(,2000).ABR,,ABR,;,1,,(1,2).,,=11.53.5.1ABRFig.1SketchoftypicalABRstructure1ABR(1)Table1DistributionofwidthofABRunits1.01.01.21.21.41.41.61.61.81.8122412(2002);FoxandVenkatasubbiah(1996);(2002);(2000);Uyaniketal.(2002);Setiadietal.(1996);(2002);(2002);Vossoughietal.(2003);FaisalandHajime(2001);Ramaraj(1998);(2000).2ABR(1)Table2DistributionofheightofABRunits1122334455112512(2002);(2000);FoxandVenkatasubbiah(1996);(2002);Setiadietal.(1996);FaisalandHajime(2001);(2002);Uyaniketal.(2002);Vossoughietal.(2003);(2000);Ramaraj(1998);(2002).2Fig.2Experimentalset2up2.ABR,100,150,370,5.25L.,,..,,350.(,BT00-100M),46mL/min,(Th)1.9h.,NaCl,,,.(,1997).073292,,CC=/C0,=t/Th.,C0.(mg/L);Th.(min).C-,LevenspielD/uL,VdV=1-.,Vd.(L);V.(L);.2,;.C-.2=20(x-)2f(x)dx20f(x)dx.(Levenspiel,1974),D/uL2=2(D/uL)-2(D/uL)2(1-e-uL/D)MatLAB6.5.33.1,ABR,,1114,.,45,2cm.,,,13,7.77%(3).,.,,.,,.,,,.4,3Fig.3InfluenceofratioofwidthofdownflowchambertoupflowchamberonhydrodynamiccharacteristicsofABR4C-Fig.4C2curvesofvariousratiosofwidthofdownflowchambertoupflowchamber,17.Stuckey(CSTR)82%,YoungandYoung(1988)50%93%.,ABR.D/uL=0,D/uL=.D/uL,0.08,,.3.245,14.5,,,.,,1733:ABR5Fig.5InfluenceofdistanceofbaffletobottomonhydrodynamiccharacteristicsofABR6C-Fig.6C2curvesofvariousdistancesofbaffletobottom,.C-.,C-,6.5,,.D/uL,0.07.2cm,,61cmC-,.3.3ABR.,.14,2cm.7,C-8.7,8,,,7Fig.7Influenceofangleofbaffleonhydrodynamiccharac2teristicsofABR8C-Fig.8C2curvesofvariousanglesofbaffle,50.,,.4(1)ABR,;(2)ABRD/uL0.050.08,,;(3),,13;(4),.ABR,;(5),,50.ReferencesBachmann,A.,Beard,V.L.,McCarty,P.L.,1983.Compari227329sonoffixedfilmreactorswithamodifiedsludgeblanketreactor.Pollut.Technol.Rev.,10:382-402.ChinaBureauofEnvironmentalProtection,1997.Waterandwastewatermonitorandanalysismethod.3rdEdition.Chi2naEnvironmentalSciencePress,Beijing(inChinese).Dai,Y.Z.,Shi,H.C.,Ji,J.P.,etal.,2000.Astudyonthebiodegradationoftoxicorganicsubstanceandsludgechar2acteristicsinanaerobicbaffledreactor.ActaScientiaeCir2cumstantiae,20(3):284-289(inChinesewithEnglishabstract).Faisal,M.,Hajime,U.,2001.Kineticanalysisofpalmoilmillwastewatertreatmentbyamodifiedanaerobicbaffledreac2tor.BiochemicalEngineeringJournal,9:25-31.Fox,P.,Venkatasubbiah,V.,1996.Coupledanaerobic/aerobictreatmentofhigh2sulphatewastewaterwithsulphatere2ductionandbiologicalsulphideoxidation.Wat.Sci.Tech2nol.,34(5-6):359-366.Grobicki,A.,Stuckey,D.C.,1992.Hydrodynamiccharacteris2ticsoftheanaerobicbaffledreactor.Wat.Res.,26(3):371-378.Guo,J.,Li,Q.X.,Ma,H.N.,etal.,1997.PreliminarystudiesonperformancesandhydrodynamiccharacteristicsofABR.ChinaWater&Wastewater,13(4):17-20(inChinesewithEnglishabstract).He,S.F.,Yi,C.Y.,Dai,Y.Z.,2002.Researchonanaerobicbaffledreactorintreatingorganicphosphorouspesticidewastewater.IndustrialWater&Wastewater,33(4):26-28(inChinesewithEnglishabstract).Lettinga,G.,Field,J.,Van,J.,1997.Advancedanaerobicwastewatertreatmentinthenearfuture.Wat.Sci.&Tech.,35(10):5-12.Levenspiel,O.,1974.Chemicalreactionengineering.2ndEdi2tion.Wiley,NewYork.Mai,W.N.,Yang,M.,Zeng,L.B.,2002.Designandoperationofantibioticswastewatertreatment.Water&WastewaterEngineering,28(4):42-45(inChinesewithEnglishab2str