OGO工艺处理城市污水的脱氮除磷效能与水力特性的试验研究

26820068ActaScientiaeCircumstantiaeVo.l26,No.8Aug.,2006:(No.50378095)SupportedbytheNationalNaturalScienceFoundationofChina(No.50378095):(1974),,;*(),Emai:[e-mail]:XUXiaoyi(1974),female,Ph.D.Candidate;*Correspondingauthor,Emai:[e-mail],,,.2006.OGO[J].,26(8):1295-1301XuXY,LuoGY,TangG,etal.2006.ExperimentalstudyonnitrogenandphosphorusremovalofmunicipalwastewaterandhydrauliccharacteristicsinOGO[J].ActaScientiaeCircumstantiae,26(8):1295-1301OGO许晓毅,罗固源*,唐刚,季铁军重庆大学三峡库区生态环境教育部重点试验室,重庆400045:20051109:20060515:20060614:OCOOGO.,.,OGO,COD22mgL-1NH+4N4.8mgL-1TN11.2mgL-1TP0.80mgL-1.,OGO,DO,OGO5.9%12.9%,.,,.:OGO;;;:02532468(2006)08129507:X703:AExperimentalstudyonnitrogenandphosphorusremovalofmunicipalwastewaterandhydrauliccharacteristicsinOGOXUXiaoy,iLUOGuyuan*,TANGGang,JITiejunKeyLaboratoryoftheThreeGorgesReservoirRegion!sEcoEnvironment,MinistryofEducation,ChongqingUniversity,Chongqing400045Abstract:Therewasacloserelationshipbetweenbiochemicalprocesscharacteristics,removalefficiencyofpollutantsandhydrauliccharacteristicsofmixingliquidforabiologicalreactor.OGOprocesswasarenovationreactorwhichdevelopedfromOCO.BasedonthecomparativetestsofnitrogenandphosphorusremovalinOCOandOGO,experimentsofhydrauliccharacteristicswerecarriedon.ResultsofcomparisonexperimentsformunicipalwastewatershowedthatthesimultaneousremovalefficiencyofnitrogenandphosphorusandstabilityinOGOwerebetterthaninOCOunderthesameoperationconditions.TheaverageeffluentconcentrationofCOD,NH+4N,TNandTPwere22mgL-1,4.8mgL-1,11.2mgL-1,0.80mgL-1respectively.StudyresultsofflowpatterncharacteristicsshowedthatDOconcentrationgradientininnerloopanoxiczeroofOGOwasbettercomparedwithOCO.Andproportionofplugflowwasincreasedfrom5.9%to12.9%afterrenovation,whichleadingtohigherutilizationrateofplugflowpatternandreactionefficiencyinOGO.MeanwhileOGOcouldimprovethehydraulicbehaviorofmixingzoneremarkably,andavoidtheproblemofsludgesettlementinmixingzeroeffectively.Keywords:OGO;biologicalnitrogenandphosphorsremova;lhydrauliccharacteristics;plugflowpattern1(Introduction),(),OrbalOOCOCOAORAOECarrousel3000,,,,(,2003).,OCO(,2000),26.,.,(2004)OCO,,,.(2004),.,,,,.,,,(Burrowetal,2001;,2001;,1998;,2003;Stamou.1994).,.,,,OCO,OGO.,.2(Materialsandmethods)1(1.,2.,3.,4.,5.,A~D)Fig.1PlanviewofOGOandOCOreactor(1.Anaerobiczone,2Anoxiczone,3Aerobiczone,4Mixingzone,5submergedpropulsors,A~D.DOtestlocation)2.1试验装置1.1,C3()2,.234,,.OCO23.OGOC60∀,OCO,,.,OCOOGO145L,40cm,,2.,,,..2(1.,2.,3.)Fig.2Theschematicdiagramoftheexperimentaldevice(1.Feedpump,2.Mainreactor,3.Settlingtank)2.2研究方法:,,.,.COD50%,MLSS(2500#320)mgL-1,OCOOGO(,2001):9h,1∃3.2∃4.6(C,),60%,(SRT)18~20d,0.3kgkg-1d-1,DO(2.0#0.2)mgL-1.OGOb/a1/2~1/4(1).12968:OGO20053~5,,.:(Verschoor,1985),(Cooperetal.,1971).CDO,,OGO.(NaCl)(,2000),,.,,.:128L,30Lh-1,40cm,,NaCl80g.2.3试验水质与测试方法NaHCO3NH4ClNaH2PO4.1.1Table1AnalyticalmethodsofwastewaterqualityindexesCODCrHACHCOD()*PO3-4PTP-NH+4NTNDOYSI5100DODDS11A*:GB11914.3(Results)3.1OGO与OCO工艺对COD氮磷的去除效果对比,COD234.2OCOOGOCODTable2RemovalefficiencyofCOD,N,andPinOCOorOGOCOD/(mgL-1)NH+4N/(mgL-1)TN/(mgL-1)TP/(mgL-1)252~452(350)*17~35(30.2)33~45(38.2)2.3~6.8(4.32)OCO()62~157(92)5.7~14.4(7.1)16~68(27)86.7%~92.8%(92.3%#2.0%)4~8(5.8)75.8%~85.7%(80.8%#2.8%)11~23(16.6)47.8%~70.1%(56.5%#6.2%)0.91~2.01(1.34)56.1%~77.7%(68.2%#7.1%)OGO()45~141836.9~21.216.3311~57(22)87.3%~94.8%(93.7%#2.1%)3~6(4.8)81.2%~87.9%(84.1%#2.2%)9~15(11.2)63.2%~76.4%(70.8%#2.7%)0.48~1.23(0.80)77.%6~82.9%(80.4%#1.4%)*,CODNH+4N,;COD90%,NH+4N80%,.OGOTNTP,TP7.09mgL-116.33mgL-1,TN56.5%70.8%,TP68.2%80.4%;OGOTNTP2.7%1.37%,,.1297263TNFig.3RemovaleffectofTNinOCOorOGO4TPFig.4RemovaleffectofTPinOCOorOGO5CDOFig.5DistributiontrendofDOininnerloopzero3.2内环缺氧区DO分布CABCD(1)DO5.,CDO,OGODO,CDO05mgL-1.,D,DO.3.3流态试验,,,OGOOCO,.,,.6.,OGOOCO(tc)33min15min.12988:OGO6Fig.6Retentiontimedistributioncurveofreactor4(Discussions)4.1OGO反应器生物脱氮除磷特性OCOC,,,,.,TP68.4%,,(Sidatetal.,1999).,NO-3N,,.,,,(Painter,1977);,,(Henze,1989).OGOC,,,.,,,.OGO,,.4.2反应器流态特征分析4.2.1缺氧区DO浓度分布,(,1994),,,.,,,,,DO.,.OGODO,DO,.,OGO,.4.2.2反应器内流态特征(,2000),,ttc(1)~(4).t=%&0tE(t)dt(1)E(t)=QVexp-QVt-(1-f1)VQt(1-f1)VQ(2)E(t)=00t∋(1-f1)VQ(3)tc=(1-f1)VQ(4),f1;(1-f1).,.,,;,.,,5.9%12.9%,7%.,OGO2,129926,,,,.4.3反应器混合区水力特性分析,,.C,,(,1998).,.,,,.7.,,C,,,.,,.7Fig.7Mixinghydrauliccharacteristicsinmixingzero5(Conclusions)1)OGONH+4N,OCO,69.8%81.3%,.2)OGO,,,,.3)OGO,,,.4)OGO,,7%,.,OGO.,.:罗固源(1944),男,教授,博士生导师,主要从事水污染控制原理与技术的研究与应用.References:BurrowLJ,WestJR,ForsterCF,etal.2001.MixingstudiesinanOrbalactivatedsludgesystem[J].WaterSA,27(1):7983CaoRY,FuJZ.2001.Measuresforimprovingvelocitydistributioninoxidationditch[J].ChinaWater&Wastewater,17(2):16~18(inChinese)ChemicalIndustryPress.2001.Typicalexampleinwatertreatmentengineering[M].Beijing:ChemicueIndustryPress,173177(inChinese)CooperAR,JeffreysGV.1971.ChemicalKineticsandReactorDesign[M].NewJersey:PrenticeHallInc,36DengRS,ZhangXB,PanJJ,etal.1998.Experimentalstudyonmixingliquidofintegratedoxidationditch[J].Water&Wastewater,Engineering,24(2):15(inChinese)HenzeM.1989.Theinfluenceofraw