DO和HRT对MBR同步硝化反硝化影响研究李绍峰

39　620076　　　　　　　　　JOURNALOFHARBININSTITUTEOFTECHNOLOGY　Vol.39No.6Jun.2007　　　　　　DOHRTMBR李绍峰1,2,崔崇威3,黄君礼3,刘玉强3(1.,150001,E-mail:[e-mail];2.,518055;3.,150090)　:通过连续运行MBR研究了DO和HRT对同步硝化反硝化的影响,同时对好氧反应器中实现SND的机理进行了探讨.试验结果表明:COD在250mg/L左右,C/N为10∶1,MLSS为3500mg/L,HRT为8.5h的相对稳定条件下,当DO为0.6～0.8mg/L时,总氮去除率达66.7%,取得了最好的TN去除效果,DO过高或过低都会影响同步硝化反硝化的进行;控制DO在1.0mg/L左右,其他操作条件相同,HRT为5h,TN去除率达到最高为60%以上,随HRT的延长,同步硝化反硝化效果反而下降;研究结果还表明由于好氧反应器中缺氧区的存在,控制操作条件可以实现SND,同时也存在着短程SND的现象,实现SND可能是几种作用机制的共同结果.:同步硝化反硝化;MBR;溶解氧;水力停留时间:X701:A:0367-6234(2007)06-0887-04InfluenceofDOandHRTonsimultaneousnitrificationanddenitrificationinMBRLIShao-feng1,2,CUIChong-wei3,HUANGJun-li3,LIUYu-qiang3(1.PostdoctoralStationofEnvironmentalTechnologyCo.Ltd.,HarbinInstituteofTechnology,Harbin150090,China,E-mail:[e-mail];2.DepartmentofArchitectureEngineering,ShenzhenPolytechnicInstitute,Shenzhen518055,China,3.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China)Abstract:TheeffectsofHRTandDOontheSimultaneousNitrificationandDenitrification(SND)inMBRandtheSNDmechanisminaerobicreactorwerestudied.TheresultsindicatedthatattheCOD=250mg/L,C/N=10∶1,MLSS=3500mg/L,HRT=8.5h,whileDOwascontrolledat0.6～0.8mg/L,theremovalratioofTNreachedtheclimaxabout66.7%.Whenotherconditionswerecontrolledthesameasbefore,theremovalefficiencyreachedto60%atHRT=5handthenbegantodeclinedalongwiththeHRTextending.Theresultsalsosuggestedthatsinceanaerobicareaexisted,throughcontrollingtheoperatingcondition,theSNDcouldbefulfilled.Atthesametime,theshort-cutSNDphenomenaalsoexited.AllofthisshowedthattheSNDwascarriedoutbycombinedactionofsomekindsofmechanism.Keywords:simultaneousnitrificationanddenitrification(SND);MBR;DO;HRT:2005-08-26.:(Z2005-2-15004);(04300420);(03KJD036).:(1972—),,,;(1938—),,,.　　,,,.,,,(Aerobic-denitrification)[1,2].(SimultaneousNitrifica-tionandDenitrification,SND),.,DO[3],C/N,pHSND[4].MBRDOHRT,、、,SND.1　试　验1.1　1.1,2,MBR2;,,,,15min,3min;,.,0.1μm,0.6m2/×4,:;,35L.1　1.2　,、、、、、、、,pH,COD250～300mg/L,NH3-N10～20mg/L.2　结果及分析2.1　DOMBRCOD250mg/L,C/N10∶1,3500mg/L,HRT8.5h,DO0.3～2.0mg/L,DO.2COD.21.0mg/L1.8mg/L,COD,COD10mg/L,98%,DO=0.6～0.8mg/L.0.6mg/L,COD,95%,0.3mg/L,COD,COD,COD68%.2　DOCOD　　3,0.6mg/L,DONH3-N,NH3-N2.0mg/L,DO0.6mg/L,NH3-N,40%,NH3-NDO,,,NH3-N.3　DONH3-N　　4,TN,DO,TN,DO0.3mg/L38.7%,0.6mg/L66.5%,DO1.8mg/L25%,,,(1g1.14g),,,.,,,,,.·888·　　　　　　　　　　　　　　　　　　　　　39　DO0.6～0.8mg/L,TN,,,,.4　DOTN　　56,NOx-N,,,,,,NOx-N,,NO-3-N.,,,,.0.6～0.8mg/L,,SND.5　DONO-2-N6　DONO-3-N2.2　HRTMBRHRT,1.0,COD250mg/L,C/N10∶1,3500mg/L,HRT10h,7h,5h,4h.7～10.7,HRT5hTN,60%,,TN,4h,TN5h,.,,,,,COD,,TN.,,,,,.,,NH3-N(8),TN.5hTN.7　HRTTN8　HRTNH3-N　　8,,,TN,HRT6～10h,,2.0mg/L,·889·6,:DOHRTMBR,NH3-N.910HRTNO-3-NNH3-N,5hNO-3-N,HRTNO-2-N,5h,NO-2-N.,NH3-NNO-2-NNO-3-NNO-2-NN2,5h,NO-2-NNO-3-NTN,..9　HRTNO-2-N10　HRTNO-3-N3　结　论1),COD250mg/L,C/N10∶1,3500mg/L,HRT8.5h,0.6～0.8mg/L,66.7%;0.3mg/L,TN38.7%;1.8～2.0mg/L,TN25%.0.6～0.8mg/L,TN,DO;2)DO1.0mg/L,,,.,5h,TN,60%;3),,DO,;,SND.SND;4)SNDDOF/M,.参考文献:[1]ZHAOHW,DONALDSM.Controllingfactorsforsim-ultaneousnitrificationanddenitrificationinatwo-stageintermittentaerationprocesstreatingdomesticsewage[J].WatRes,1999,33(1):961-970.[2]HYUNGSY.Nitrogenremovalfromsyntheticwastewaterbysimultaneousnitrificationanddenitrifica-tion(SND)vianitriteinaintermittently-aeratedreac-tor[J].WatRes,1999,33(1):145-154.[3],,,.MBR[J].2001,22(7):51-55.[4],,,.MBRDO[J].2001,17(6):10-14.(　姚向红)·890·　　　　　　　　　　　　　　　　　　　　　39