UASB反应器用在有机废水处理过程中的数学模型及分析崔波

162No.2Vol.1620024JournalofChemicalEngineeringofChineseUniversitiesApr.20021003-9015(2002)02-0155-06UASB,,(266042)(UASB)UASBX783TQ018TQ033A1CODBOD,[1~2]WageningenLettinga(UpflowAnaerobicSludgeBlanket)(UASB,1)[3],,(Aggregation),,,(),UASBCOD20kg⋅m-3⋅d-1,4,[4~5],COD90%UASBUASB22.1UASB()2.1.1,-,R=Rmax[s]/([s]+Km),2000-08-21;2001-12-19(1945-)Water4CHChamberbed-sludgeUASB1ReactorUASBofSchemeFig.1layersuspendedSludgeWater1UASBFig.1SchemeofUASBreactorSludge-bed15620024,[6],:)/(smgskXsr+=m(1)mm,d-1,,XkskXsrdsmg-+=m(2)2.1.2[7],,Y,,:)(smsskYXsr+=m(3):YKmm=,skKXsr+=ss(4)2.1.3CH4,CH4,COD:[CODCOD]=COD1gCOD,0.25gCH4[8],0.35LCH4,:)(35.0e0CH4ssFr-=(5)2.1.4(2)~(4),Y,K,ks,kdt(10)ks,K,g0ddVrFXFXtXV++=(6)ds1kXrtVF-==(7)Ykd11Table1KineticparametersofanaerobicdigestionParameterY,mgVs⋅(mgCOD)-1kd,d-1ks,mg⋅L-1mm,d-1K,mgCOD⋅(mgVs⋅d)-1Data0.0750.014405.066.72.2UASB,(),--(-)[9]:,:,,162UASB157,,,1/Pe=0.11,,:,,:,,,UASB2.3UASBUASB22.3.1dl,dvR,3,(1),;(2)(),,Fick;(3)Ez:g22rlsulsEtsz-∂∂-∂∂=∂∂(8)⎪⎩⎪⎨⎧==Lll00dddd000=⎟⎠⎞⎜⎝⎛⎟⎠⎞⎜⎝⎛-=++LzlslsEusus(9)0ssS=mtt=qLlZ=(8)0=∂∂qSe1P.0g022=⋅-∂∂-∂∂rusLZSZS(10)⎪⎩⎪⎨⎧===-=011101e1nsZsPsZ(11)zELuP=e2.3.2,VrXXFVtXg21)(dd+-=(12),X=Y(S0-S1)+X3:d2s2m31021)(tkskstXssYX++-+-=m(13)0l=Ll=dl3Fig.3Materialbalanceofaback-mixingmodelintheaxialdirectionusEz⋅ls∂∂Ez⋅llls∂⋅∂∂+∂)d(su(s+llsd⋅∂∂)SludgebedSludgesuspendedlayerTriphaseseparatorS0S1X1S2X3CH4UASB2ReactorAUASBinTreatmentterWastewaOrganicforModelFlowingMaterialFig.2F,S0X2X2F2UASBFig.2MaterialflowingmodelfororganicwastewatertreatmentinaUASBreactors2s1F,s015820024:0)(2s2221=+--sksKXVssF(14)2.3.3,,,R=(F-FW)/FCODseXeeWWc)(XFFXFVXt-+=(15)FW0)])([)(eWWds=-+--XFFXFVXkr(16)(4)(15)(16)s=sedesec1kskKst-+=(17)COD]1)([)1(1dc0cds0e0--+-=-=kKtstkksssx(18)3,,,,,COD4UASB,,COD20000mg⋅L-12000mg⋅L-1,,350mg⋅L-14.1,242%,,,,2Table2ResultcomparationbetweenthemodelingandthepilotexperimentNo.123456CODinfeedingwastewater,mg⋅L-1213392506322729221622414625166Flowrateofwastewater,m3⋅d-19.79.211.112.613.615.1Totalorganicload,gCOD⋅L-1⋅d-18.289.39.7910.8310.09.7Averalhydraulicresidencetime,d2.452.552.151.862.212.41Pilotdata,(CODremovalefficiency,%)95.194.792.690.991.492.8Calculateddata(CODremovalefficiency,%)93.493.491.788.789.691.1Relativelyerror,%1.791.370.972.421.961.834.2566,,,,,,,,0500010000150002000025000012345S,mg·L-1h,m4CODFig.4CODfilealongthelengthofthereactorcalculatedvalucexperimentalvalues0=25000mg⋅L-1s2=2225mg⋅L-1162UASB159COD7R0.51,COD90%95%8445UASB(1)-(2)(3):CCOD%t,dF,L⋅d-1V,Lh,mVsrg,mg⋅L-1⋅d-1Vss,mg⋅L-1rs,mg⋅L-1⋅d-1u,m⋅d-100.511.522.533.5050100150h,mVss,mg⋅L-15Fig.5Sludgeconcentritionfilealongthelengthofthereactor4.3[10]611162101234h,mrs,mg·L-1·d-16Fig.6Decompositionratedistributionalongthelengthofthereactor909294960.50.70.9C,%R7CODFig.7EffectofrecyclingamountofsludgeontheCODremovalefficiency89909192939495962345t,dC,%8Fig.8Effectofthemeanresidencetimeofthemicro-organismontheCODremoverate16020024sCOD,mg⋅L-1X,mg⋅L-1s0COD,mg⋅L-1Xemg⋅L-1s1,s2COD,mg⋅L-1xCOD,%seCOD,mg⋅L-1X1,X2,X3,mg⋅L-1[1]FangHHP,ChuiHK,LiYY,etal.PerformanceandgranulecharacteristicsofUASBprocesstreatingwastewaterwithhydrolyzedproteins[J].WatSciTech,1994,30(8):55-63.[2]SUNHai-yan(),CUIBo().Wastewatertreatmenttechniqueforbrewingindustry()[J].ShandongChemicalIndustry(),1998(3):37.[3]VanderMeer.Mathemticaldescriptionofanaerobictreatmentofwasterinupflowrectors[J].BiotechBioeng,1983,25(11):2531-56.[4]VieiraSMM,CarvalhoJL,etal.ApplicationoftheUASBtechnologyforsewagetreatmentinasmallcommunityatSumare,SaoPauloStaste[J].WatSciTech,1994,30(12):203-210.[5]DriessenWJBM,TielbaardMH,VereijkenTLFM.ExperienceonanaerobictreatmentofdistilleryeffluentwiththeUASBprocess[J].WatSciTech,1994,30(12):193.[6]QINYu-heng(),etal.Translating(),WastewaterEngineeringTreatment,DisposeandRecovery()[M],Beijing():ChemicalIndustryPublishingCompany(),1986.[7]BorjaR,MartinA,DuranMM,etal.Kineticstudyofanaerobicdigestionofbrewerywastewater[J],ProcessBiochemistry,1994,29:645-650.[8]ChinaBureanofEnvironmentalProtection(),PrincipleandTechnologyofTreatingHighConcentrationOrganicWastewaterbyAnaerobicMethod()[M].Beijing():HigherEducationPublishingCompany(),1990.[9]HeertjesPM,etal.Fluidflowpatterninupflowreactorsforanaerobiatreatmentofbeetsugarfactorywastewater[J].BiotenolBioeng,1982,24(2):433.[10]OkwnoYoshio,TanakaKazuhiko.Apparatusandmethodfororganicwastewatertreatment[P],JapclCo2F3/34,[97,108,692],1997.AnalysisandMathematicalModelofTreatmentofOrganicWastewaterinUASBReactorCUIBo,SUNHai-yan,JINQing(QingdaoInstituteofChemicalTechnology,Qingdao266042,China)Abstract:Anupflowanaerobicsludgeblanket(UASB)reactorwasemployedfortreatingbrewerywastewateratnormaltemperature.Thebiochemicalreactionkineticswasdiscussed.Amathematicalmodeldescribingboththereactionprocessandthefluidflowinginthereactorwasdeveloped,inwhichtheback-mixingintheaxialdirectionwasconsideredfirstinthesludgebedandthenintheupperpartitwasconsideredasperfectmixing.TheequationsweresolvedbyNewtonmethodandthecalculationresultsaresatisfactorycomparedwiththecollecteddatafromShandongAlcoholFactory.Theresultsalsoshowthatth