AO生物脱氮工艺处理生活污水中试一短程硝化反硝化的研究马勇

26520065　　　　　　ActaScientiaeCircumstantiaeVo.l26,No.5May,2006:-()(No.50521140075);(No.20377003);SupportedbytheNationalNaturalScienceFoundationofChina(No.20377003);TheKeyInternationalCooperativeProjectofNSFC(No.50521140075);TheOpenProjectofKeyLaboratoryofBeijing:　(1976—),,;*(),E-mail:[e-mail]:MAYong(1976—),male,Ph.D.;*Correspondingauthor,E-mail:[e-mail]　,,　,.2006.A/O()[J].,26(5):703-709MaY,WangSY,ZengW,etal.2006.A/Opilot-scalenitrogenremovalprocesstreatingdomesticwastewaterⅠ.Thestudyofshort-cutnitrificationanddenitrification[J].ActaScientiaeCircumstantiae,26(5):703-709A/O()马　勇1,王淑莹2,曾　薇2,彭永臻1,2,*,周　利31.哈尔滨工业大学,市政与环境工程学院,哈尔滨1500902.北京工业大学,北京市水质科学与水环境恢复工程重点实验室,北京1000223.青岛理工大学环境与市政学院,青岛266033:2005-08-19　　　:2006-03-21　　　:2006-03-21:A/O,pH、(MLSS)、(FA)、、(SRT)、(DO)(HRT)A/O。,DOA/O,FISHDO(0.3～0.7mgL-1)(NOB),,85%,95%。DO,185%10%,DO,2(75%)。DO,,,,,SVI80～120mLg-1:A/O;;;DO,;FISH:0253-2468(2006)05-0703-07　　　:X703.1　　　:AA/Opilot-scalenitrogenremovalprocesstreatingdomesticwastewaterⅠ.Thestudyofshort-cutnitrificationanddenitrificationMAYong1,ZENGWei2,WANGShuying2,PENGYongzhen1,2,*1.SchoolofMunicipalandEnvironmentalEngineering,HarbininstituteofTechnology,Harbin1500902.KeyLaboratoryofBeijingforWaterEnvironmentalRecoveryEngineering,BeijingUniversityofTechnology,Beijing1000223.InstituteofEnvironmentMunicipalEngineering,QingdaotechnologicalUniversity,Qingdao266033Received19August2005;　　　receivedinrevisedform21March2006;　　　accepted21March2006Abstract:Theeffectofmainfactors,suchaspH,MLSS,FA,T,SRT,DOandHRT,onshort-cutnitrificationanddenitrificationwassystematicallyanalyzedinapilot-scaleA/Onitrogenremovalplanttreatingdomesticwastewater.TheexperimentalresultsdemonstratedthatDOisthemainfactortoachieveshort-cutnitrificationinthestudy.Fishanalysispresentedthatalong-termoperationatlowDO(0.3～0.7mgL-1)concentrationleadtotheeliminationofammoniaoxidizingbacteria(AOB),soastorealizenitriteaccumulation.Theaveragenitriteaccumulationratiocouldreach85%;sometimesthenitriteaccumulationratiowashigherthan95%.Theshort-cutnitrificationanddenitrificationwasdamagedwiththenitriteaccumulationratiodecreasingfrom85%to10%whenDOwasincreasedabove1.5mgL-1.Thenitriteaccumulationratiowasresumedto75%afterabouttwosludgeageswiththeDOkeptinlowleve.lTheSVIincreasedwiththeincreaseofnitriteaccumulationratiointheinitialperiod,buttheSVImaintainedataproperlevelof80～120mLg-1intheaftertimenomatterhowhighorlowthenitriteaccumulationratiowas.Keywords:A/Opilotplant;domesticwastewater;short-cutnitrificationanddenitrification;DO;nitriteaccumulation　　.(Nitrosomonas)NH+4-NDOI:牨牥牨牫牰牱牨牤jhjkxxb牪牥牥牰牥牭牥牥牨　　　　　　　　　　26NO-2-N;(Nitrobacter)NO-2-NNO-3-N.NO-3-NNO-2-N、NON2ON2,NO-2-N.Voets(1975),NO-2-N,.,,NH+4-N→NO-2-N→N2,.,,(TurkandMavinci,1987):1)25%,;2)40%,;3)NO-2-NNO-3-N63%;4)50%;5)30%～40%;6).、、pH,,.,,,NO-2-N.,,:(FA)(Surmaczetal.,1997)、pH(Villaverdeetal.,1997)、(25℃)(Hellingaetal.,1998)、DO(Münchetal.,1996)、(TurkandMavinic,1986)、(FH)(YangandAlleman,1982).SBR,,、,DO、pH、FA、.95%,、.,(10L)、、,,A/O(Ruizaetal.,2003;Ciudadetal.,2005).,A/O,,A/O,,,,A/O、.1　(Materialsandmethods)1.1中试试验模型,(1).300L.8().2,6.,100L.、,20～22℃,3000～4000mgL-1,SRT15d,2,0.5,650～800Ld-1,HRT9～11h,DO,ORP、DOpH.1　A/OFig.1　TheschematicdiagramofA/Opilotplant1.2试验用水,1,COD248.6mgL-1,(TN)84.9mgL-1,C/N,2.93.7045　:A/O()1　Table1　TheinfluentcharacteristicspHCOD/(mgL-1)TN/(mgL-1)NH+4-N/(mg.L-1)NO-2-N/(mgL-1)NO-3-N/(mgL-1)/(mgL-1)7.15～7.70163.2～389.068.5～110.265.4～105.70.05～0.250.69～1.83200～4207.50248.684.979.10.151.183201.3分析项目及方法COD、TN、NH+4-N、NO-3-N、NO-2-N、PO-4-P、、MLSS,.DOWTW-level2,pHORPWTW340i.2　(Experimentresults)2.1不同试验阶段亚硝酸盐积累率2,A/O,(η,η=ρ(NO-2-N)×100%/(ρ(NO-2-N)+ρ(NO-3-N))4.3120%31580%(),,95%(315425),(42552),15%～30%(53521),20%70%(521526),,,80%.:----,,:、FA、pH、SRT、DO、HRT、MLSS,A/O.2　Fig.2　Thenitriteaccumulationatdifferentphase2.2　A/O工艺短程硝化影响因素分析2.2.1　温度的影响　Balmelle(1992)10～20℃,,FA,,,FA.20～25℃,.25℃,FA,FA.,SHARON,30～36℃(Hellingaetal.,1998).(2001)SBR28℃,(19.5～23.5℃),.20～22℃,,,.2.2.2　pH值的影响　pH,pH,pH,,pH7.0～8.5,6.0～7.5.(1999),pH7.4～8.3,,pH8.0,pH7.0.pH7,,.pH,pH.3A/OpH.,pH,7.2～7.7.,pH,.,,pH,,pH.705　　　　　　　　　　263　pHFig.3　TherelationbetweentheinfluentpHandnitriteaccumulation2.2.3　FA的影响　(FA),pH,.FA(Daniel,1998):A=1714×B×10pHKbK/w+10pH=1.214×B×10pHe6344/T+10pH,A,mgL-1;B,mgL-1;Kb;Kw;T,K.FA,FA,FA,FA.4FA,FA0.4～1.5mgL-1,0.93mgL-1.,FA0.15～0.70mgL-1,0.41mgL-1.Abelin(1992)FA1～5mgL-1,.Balmelle(1992)FA(1mgL-1).,FA1.0mgL-1,,,、FA,FA0.75mgL-1.FA1.0mgL-1,FA(TurkandMavinci,1986;1987;Mauretetal.,1996).,FA,,FA,,FA.4　FAFig.4　TherelationbetweennitriteaccumulationandtheFAinrawwastewaterandtheinfluentofaerobiczone2.2.4污泥浓度和SRT的影响　HRTMLSS,3000～4000mgL-1,3500mgL-1.,.,,,,,MLSS.SRT、,(Hellingaetal.,1998),SHARONSRTHRT,,.Pollice(2002),32℃、pH7.2,,,SRT10d,.SRT15d,,,,SRT,SRT.2.2.5DO的影响　5DO,,DO0.3～0.7mgL-1(0.5mgL-1),,,3320%31580%.1.2～1.5mgL-10.2～0.4mgL-1,7065　:A/O(),DO,.DO(315410),95%,,100%.DO,,.5　DOFig.5　TherelationbetweennitriteaccumulationandDO　　,48,FISH,6,(NOB),(AOB),AOB5%,DONOB,.415DO(DO1.75mgL-1),DO,.415425,DO,,DO,,.425,DO0.5mgL-1,,42685%5140%,10dDO,,DO.　6　DOAOB