O3BAF工艺系统中有机物生物降解数学模型王树涛

4　3环境工程学报Vol.4,No.320103ChineseJournalofEnvironmentalEngineeringMar.2010O3/BAF王树涛1,2　孙兴滨3　马　军1,2　刘惠玲2(1.,150090;2.,150090;3.,150040)　　/(O3/BAF),BAF。、,BAF,BAFSeS0=exp(-KhqSn0)。COD(Se/S0)(h)。(S0),ln(Se/S0)～hm=KqSn0,ln(qm)=-nln(S0)+lnK。BAFKn1.7080.5063。BAF:、,BAF(、)。　　　(BAF)　　X703.1　　　A　　　1673-9108(2010)03-0561-04DynamicmodelofO3/BAFsystemduringadvancedtreatmentofsecondarymunicipalwastewatereffluentWangShutao1,2　SunXingbin3　MaJun1,2　LiuHuiling1(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.StateKeyLabofUrbanWaterResourceandEnvironment,HarbinInstituteofTechnology,Harbin150090,China;3.DepartmentofEnvironmentalScience,NortheastForestryUniversity,Harbin150040,China)Abstract　Thestudyofadynamicmodelofbiologicalaeratedfilter(BAF)wascarriedoutinadvancedtreatmentofsecondarymunicipalwastewatereffluentbypre-ozonation/(O3/BAF).Inthismodel,theorganicsconcentrationandtheheightofthemedialayerweretakenasthetwobasiccontrollingparameters.TheresultsshowsthatthedynamicmodelequationcouldbedescribedwithSeS0=exp(-KhqSn0).Itisalinearfunctionoflog-arithmoftheratioofSetoS0withtheheightofthemedialayerh,basedontherelationshipofln(Se/S0)withhandm=KqSn0,ln(qm)=-nln(S0)+lnKcouldbeachieved.TheintegratedrunningconstantKandcharacteris-ticconstantnare1.708and0.5063,respectively.Thepresentedmodelcangivesomehelpforthesizedesignofthebiologicalaeratedfilerbasedonflowrate,influentandeffluentorganicsconcentrations.Keywords　dynamicmodel;advancedtreatment;secondaryeffluent;pre-ozonation;biologicalaeratedfilter:(QA200812);(20090450985);(705013):2009-03-24;:2009-04-24:(1975～),,,,。E-mail:[e-mail]　　,,。,(BAF)[1,2]。BAF,CODCOD,[3]。BAF[4,5],。Mann[6],BAF。,O3/BAF4,BAF,,,。1　1.1　BAF。BAF40mm、2400mm,2～4mm,1.6m。BAF,1～2L/h,0.8～1.6h。1.2　CODNH3-N;DOYSI;TNTOCShimadouTOC(TN)-5000Ana-lyzer。1.3　A2/O。:----A2/O--。SS,,0.30m(1～3mm),1。1　Table1　WatercharacteristicsaftersandfiltrationandozonationCOD(mg/L)BOD(mg/L)TOC(mg/L)UV254(cm-1)40～608～159～130.18～0.2430～506～127～100.07～0.152　2.1　BAF40mm,1～2m/h,BAF,,,,1BAF。、,BAF,,,BAFdv:=--(1):=--(2),dv,Qds,mg/h;H:,m;Q:,L/h;dv:BAF,L;Se、S0:,mg/L;ds:dv,mg/L1　BAFFig.1　Simplifieddiagramofbiologicalaeratedfilterdv,(mg/h),(ds/dt)Adv+(ds/dt)Sdv(3)dv(ds/dt)dv,mg/h.dv:(ds/dt)dv=Qds-[(ds/dt)A+(ds/dt)S]dv(4)dv=A·dh(5)Q—,L/h;dv—BAF,L;ds—dv,mg/L;A—,dm2;(ds/dt)A—dv,mg/(L·h);(ds/dt)S—dv,mg/(L·h);(ds/dt)—dv,mg/(L·h)。,,:(ds/dt)dv=0,(4):Qds-(ds/dt)Adv-(ds/dt)Sdv=0(6)BAF,,(6):5623:O3/BAFQds=(ds/dt)Adv(7),,:ds/dt=-k1·X·S(8)　k1—;X—;S—tCOD,mg/LX,k1X,k=k1X。(5)(7)(8),:ds/dh=-kASQ(9)q=QA,m3/(m2·h),(9):ds/S=-kqdh(10)(10):SeS0=exp(-khq)(11)　Se—COD;S0—COD;h—(11),Eckenfelder[7,8]:CeC0=exp(-K2hLn)(12)BAF,(11)(12),MannA.[9],(11)Sn0(n),Ln。K,K/qK2。,BAF:SeS0=exp(-KhqSn0)(13),n—;K—。(11)(13),K=kSn0。K、。m=KqSn0,(13):S0Se=exp(-mh)(14):m—()。(14),COD(Se/S0)(h)。(S0),ln(Se/S0)h(:lnSeS0=mh),m.m=KqSn0,,ln(qm)ln(S0)(:ln(qm)=-nln(S0)+lnK,nyln(K),Kn。2.2　BAF,BAF1.58×10-3m3/h,1m3/(m2·h),1.6h。,BAF55%～63%。0.4m3/(m2·h)6m3/(m2·h),63.5%54%[2]。BAFCOD40～55mg/L,,,,。,BAF,。,DO2mg/L,DO。BAF,mK、,。,mK。25,ln(Se/S0)h,lnSeS0=-mh+b5m(b,),3。ln(qm)=-nln(S0)+lnK,nyln(K),nK。1m/h,S042.4、44.3、46.7、48.152.1mg/L,qm:11.43、11.7、11.74、12.1712.71,ln(qm)ln(S0)(2)。:y=0.5063x+0.5352,R2=0.9365。,n0.5063,K1.708。　　:BAF,,,BAF(),。,,;56342　ln(S0/Se)hTable2　Quantitiverelationshipofln(S0/Se)withh(m)1COD(mg/L)ln(Se/S0)2COD(mg/L)ln(Se/S0)3COD(mg/L)ln(Se/S0)4COD(mg/L)ln(Se/S0)5COD(mg/L)ln(Se/S0)042.4-44.3-46.7-48.1-52.1-0.233.10.234.10.334.60.339.40.243.20.20.428.40.430.60.431.30.431.30.436.50.40.625.40.523.50.626.20.626.50.630.70.5120.80.721.30.721.00.824.10.725.50.71.219.10.819.00.818.20.921.20.823.40.81.617.00.917.30.918.70.918.31.020.30.9　　1)0mCOD3　CODmTable3　DynamicequationsofCODdegradationandmvaluesm1ln(Se/S0)=0.4766h+0.2008R2=0.978m1=0.47662ln(Se/S0)=0.4875h+0.2249R2=0.9284m2=0.48753ln(Se/S0)=0.489h+0.2488R2=0.9085m3=0.48904ln(Se/S0)=0.5071h+0.1956R2=0.9414m4=0.50715ln(Se/S0)=0.5296h+0.146R2=0.9683m5=0.5296lnSeS0=mhm=KqSn0、nK,h。,1.6m,pH,pH、,。3　　O3/BAF,BAF,、,BAFSeS0=exp(-KhqSn0)。COD(Se/S0)(h)。(S0),ln(Se/S0)h,m=KqSn0,ln(qm)=-nln(S0)+lnK。BAFKn1.7080.5063。、,BAF(),;,;lnSeS0=mhm=KqSn0、nK,。[1],,,./.,2006,26(11):32～36[2]WangShutao,MaJun,LiuBaicang,etal.Degradationcharacteristicsofsecondaryeffluentofdomesticwastewaterbycombinedprocessofozonationandbiofiltration.JournalofHazardousMaterials,2008,150(1):109～114[3].().:,1987.129～138[4]SinkoffM.D.,PorgesR.,McdermottJ.J.Meanresidencetimeofaliquidinatricklingfilter.JournalofSanitaryEn-gineeringDivision(AmericanSocietyofCivilEngineers),1959,85(6):51～78[5]AllanMann,LeopoldoMendoza-Espinosa,TomStephenson.Acomparisonoffloatingandsunkenmediabiologicalaera-tellfiltersfornitrification.JournalofChemicalTechnologyBiotechnology,1998,72:273～279[6]MannA.T.,StephensonT.Modelingbiologicalaeratedfil-tersforwastewatertreatment.WaterResearch,1997,31(10):2443～2448[7].Eckenfelder.,1999,15(5):1～5[8]EckenfelderJ.W.W.,BarnhartE.E.Performanceofahighratetricklingfilterusingselectedmedia.JournalofWaterPollutionControlFederation,1963,35:1535～1551[9]MannA.Performa