搜索
38 520066 JOURNALOFHARBININSTITUTEOFTECHNOLOGY Vol.38No.6Jun.2006 张树军1,彭永臻1,郑淑文1,曾薇1,周利2(1.,,100022;2.,266033) :采用“两级UASB-A/O生化系统”处理含有高质量浓度COD与NH4+-N的生活垃圾渗滤液.在UASB1中实现同时反硝化与产甲烷反应,出水COD在UASB2中进一步去除.在A/O反应器中去除残余COD与NH4+-N的彻底硝化.在UASB1与UASB2中最大COD去除率分别为12.5kg/(m3d)与8.5kg/(m3d).两级UASB为后续硝化创造了良好的条件.UASB1在30℃的气体产率为0.28m3/kgCOD,气体的组成相对恒定,CH4,N2,CO2所占的比例分别为63%～73%,25%～35%,2%.UASB2在35℃的气体产率为0.40m3/kgCOD,CH4,CO2所占的比例分别为98%,2%.通过几乎100%的短程硝化NH4+-N几乎完全去除,最大NH4+-N去除负荷为0.68kg/(m3d).该技术实现了渗滤液经济高效的生物脱氮.:垃圾渗滤液;同步反硝化与产甲烷;短程硝化与反硝化;生物脱氮:X703:A:0367-6234(2006)06-0937-04BiologicaltreatmentofmunicipallandfillleachateZHANGShu-jun1,PENGYong-zhen1,ZHENGShu-wen1,ZENGWei1,Zhou-li2(1.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022,China;2.SchoolofMunicipalandEnvironmental,QingdaoTechnologicalUniversity,Qingdao266033,China)Abstract:Atwo-stageUASB-A/Osystemwasintroducedtotreataleachatecontaininghighorganicsandammoniafromanimmaturelandfillsite.ThesimultaneousdenitrificationandmethanogenesisweresuccessfullycarriedoutinUASB1andtheeffluentCODwasfurtherremovedinUASB2.Thebiodegradationofresidualor-ganicsubstanceandnitrificationtookplaceintheA/Oreactor.ThemaximumorganicremovalratesinUASB1andUASB2were12.5and8.5kg/(m3d),respectively.Thesubsequentnitrificationwasimprovedsignifi-cantlyduetothelowerinfluentCODfromthetwo-stageUASB.ThegasproductionrateinUASB1was0.28m3/kgCODat30℃.ThecompositionofbiogasCH4,N2andCO2wasrelativelyconstant,accountingfor63%～73%,25%～35%,andabout2%,respectively.ThegasproductionrateinUASB2was0.40m3/kgat35℃andthecompositionofboigasCH4andCO2wasalsorelativelyconstantat98%and2%,respective-ly.ThemaximumNH4+-Nremovalratewas0.68kg/(m3d)andNH4+-Nremovalefficiencywasnearly100%bycompleteshort-cutnitrificationintheaerobicreactor.Biologicalnitrogenremovalforleachatewithhigh-strengthammoniawasrealizedeconomicallyandeffectively.Keywords:landfillleachate;simultaneousmethanogenesisanddenitrification;short-cutnitrificationanddenitrification;biologicalnitrogenremoval:2004-06-10.:(50521140075);(2003AA601010);.:(1970—),,;(1949—),,,. (“”)、.“”.“”,,.:、;;;,,..[1].“UASB-A/O”,UASB1,,,.,,.1 材料与方法1,UASBA/O.,UASB1、UASB2、A/O,4.25、8.25、15L.10,.UASB,UASB1UASB230、35℃,.UASB.A/O.,1,.:COD7000～25000mg/L;BOD53500～14000mg/L;NH4+-N1250～2450mg/L;SS3000～4000mg/L;8000～11000mg/L;TP9～15mg/L;pH7.2～7.9.2d1,[2].1 UASB-A/O2 结果与讨论2.1 ,、COD、、COD1.UASB11∶1,1∶2,1∶3,1∶3.5.COD,COD.COD,NOx--N,COD,,.1 (Ld-1)ρ(COD)(mgL-1)U1OLRkg(m3d)-1U2OLRkg(m3d)-1A/OOLRkg(m3d)-1/%U1U2A/O10.030007.12.30.63674419210.040009.42.60.6435841905.51000013.03.70.4486525935.55.55.512000120001200015.315.315.33.75.86.60.40.81.14031326764631929299393935.55.5125001250016.216.26.16.31.12.72520382220398787 COD2.UASB1COD,.,COD,800～1400mg/L,COD.A/O:NH4+-N、、0.20～0.69kg/(m3d),100%～125%125%～350%.NH4+-N1250～2450mg/L,pH[3].UASB1NH4+-N300～600mg/L,,.,A/ONH4+-N150～400mg/L.3,NH4+-N0.20～0.69kg/(m3d),NH4+-N99.5%,938 38 NH4+-N15mg/L.DO、FA、pH,3100%,NO3--N10mg/L,NO2--N90～400mg/L.,.,.2 COD3 NO3--NNO2--N20mg/L,,TINNH4+-N.4,、21,TIN80%～92%.TIN(1).TINUASB1A/O.UASB1[4].TIN/%=ReRe+1+1-ReRe+1×RsRs+1,(1):Re;Rs.(1):100%;UASB1A/O100%;UASBNH4+-N.4 (TIN)2.2 UASB1UASB2UASB1COD12.UASB1.NO2--N100～400mg/L,NO2--N3mg/L.,UASB1NO2--N1.6kg/(m3d),UASB1. 5UASB1.UASB1.pH8.3～9.0,UASB1NO2--N,UASB1pH8.2～8.7.pHUASB1CO2,HCO3-、CO32-、CO21%.NO2--N,.UASB1、NO2--NNO2--NCOD.5 UASB1(OLRs) V=nRT/P9396,:,30℃1mol24.86L.30℃1gNO2--N,0.88L/gNO2--N.NO2--NCOD[5]1.71/(1-1.42Yn)=5.14g/gNO2--N,Yn()=0.47gVSS/gCOD[6].,30℃1gCODNO2--N173mL,,COD64g/molCH4[8],30℃388ml/gCOD.,1gCOD1gCODNO2--N388-173=215ml/gCOD.5:OLR13kgCOD/(m3d),UASB1OLR.OLR13～16.5kgCOD/(m3d),,.,1gCOD,215ml,,UASB1.UASB1CODUASB2.UASB2pH8.2,CO2HCO3-、CO32-、CO21%,UASB297%.,UASB2.35℃COD400mlCH4/gCOD.2.3 A/OA/O10,.NO2--NNO3--N.6100%,TIN、NH4+-N、NO2--N、NO3--Nraw,U1-i,U1-e,U2-e、UASB1、UASB1、UASB2;O-n6 .,100%3.,.3,NH4+-N、NO2--N、UASB1NO2--N100%.NO3--N10mg/L.,,“”.3 结 论1)“UASB-A/O”.UASB1,.2),.,,FA.3)A/O,.100%NH4+-N100%.参考文献:[1]IMJH,WOOHJ,CHOIMW,etal.Simultaneousor-ganicandnitrogenremovalfrommunicipallandfillleachateusingananaerobic-aerobicsystem[J].WatRes,2001,35:2403-2410.[2].[M].:,2002.[3]BARISC,BULENTM,BULENTI.Effectsofhighfreeammoniaconcentrationsontheperformancesofanaerobicbioreactors[J].ProcessBiochemistry,2005,40:1285-1292.[4]HARMSENVH,BIRGITTEKA.Intergradedremovalofnitriteandcarboninanupflowanaerobicsludgeblan-ket(UASB)reactor:Operatingperformance[J].WatRes,1996,30:1451-1458.[5]FRANKINGT,STENSELBHD.WastewaterEngi-neeringTreatmentandReuse(fourthEdition)[M].[s..l]:MetcalfandEddy,Inc,2003.[6]MOGENSH,POULH,JESLCJ.WastewaterTreat-mentBiologicalandChemicalProcesses[M].NewYork:SpringerVerlagBerlinHaidelberg,1997.( 刘彤)940 38