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许晓毅1

26820068　　　　　　ActaScientiaeCircumstantiaeVo.l26,No.8Aug.,2006:(No.50378095)SupportedbytheNationalNaturalScienceFoundationofChina(No.50378095):(1974—),,;*(),E-mail:[e-mail]:XUXiaoyi(1974—),female,Ph.D.Candidate;*Correspondingauthor,E-mail:[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400045:2005-11-09　　　:2006-05-15　　　:2006-06-14:OCOOGO.,.,OGO、,COD22mgL-1、NH+4-N4.8mgL-1、TN11.2mgL-1、TP0.80mgL-1.,OGO,DO,OGO5.9%12.9%,.,,.:OGO;;;:0253-2468(2006)08-1295-07　　　:X703　　　:AExpermientalstudyonnitrogenandphosphorusremovalofmunicipalwastewaterandhydrauliccharacteristicsinOGOXUXiaoyi,LUOGuyuan*,TANGGang,JITiejunKeyLaboratoryoftheThreeGorgesReservoirRegion’sEco-Environment,MinistryofEducation,ChongqingUniversity,Chongqing400045Abstract:Therewasacloserelationshipbetweenbio-chemicalprocesscharacteristics,removalefficiencyofpollutantsandhydrauliccharacteristicsofmixingliquidforabiologicalreactor.OGOprocesswasarenovationreactorwhichdevelopedfromOCO.BasedonthecomparativetestsofnitrogenandphosphorusremovalinOCOandOGO,experimentsofhydrauliccharacteristicswerecarriedon.ResultsofcomparisonexperimentsformunicipalwastewatershowedthatthesimultaneousremovalefficiencyofnitrogenandphosphorusandstabilityinOGOwerebetterthaninOCOunderthesameoperationconditions.TheaverageeffluentconcentrationofCOD,NH+4-N,TNandTPwere22mgL-1,4.8mgL-1,11.2mgL-1,0.80mgL-1respectively.StudyresultsofflowpatterncharacteristicsshowedthatDOconcentrationgradientininner-loopanoxiczeroofOGOwasbettercomparedwithOCO.Andproportionofplug-flowwasincreasedfrom5.9%to12.9%afterrenovation,whichleadingtohigherutilizationrateofplug-flowpatternandreactionefficiencyinOGO.MeanwhileOGOcouldimprovethehydraulicbehaviorofmixingzoneremarkably,andavoidtheproblemofsludge-settlementinmixingzeroeffectively.Keywords:OGO;biologicalnitrogenandphosphorsremoval;hydrauliccharacteristics;plug-flowpattern1　(Introduction),(),Orbal、OOC、OCO、AOR、AOE、Carrousel3000,、、,,,(,2003).,OCO(,2000)、,、、DOI:牨牥牨牫牰牱牨牤jhjkxxb牪牥牥牰牥牳牥牨牪　　　　　　　　　　26.,.,(2004)OCO,,,.(2004),.,,、,,.,,,(Burrowetal,2001;,2001;,1998;,2003;Stamou.1994).--、,.,,,OCO,OGO.,.2　(Materialsandmethods)1　(1.,2.,3.,4.,5.,A～D)Fig.1　PlanviewofOGOandOCOreactor(1.Anaerobiczone,2.Anoxiczone,3.Aerobiczone,4.Mixingzone,5.submergedpropulsors,A～D.DOtestlocation)2.1　试验装置1.1,C-3()2,.2、34,,.OCO2、3.OGOC-60°,OCO、,,.,OCOOGO145L,40cm,,2.,,,..2　(1.,2.,3.)Fig.2　Theschematicdiagramoftheexperimentaldevice(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).C-DO,,OGO.(NaCl)(,2000),,.,,.:128L,30Lh-1,40cm,,NaCl80g.2.3　试验水质与测试方法、、NaHCO3、NH4ClNaH2PO4.1.1Table1　AnalyticalmethodsofwastewaterqualityindexesCODCrHACH-COD()*PO3-4-PTP-NH+4-NTN-DOYSI5100DODDS-11A　　*:GB11914.3　(Results)3.1　OGO与OCO工艺对COD、氮、磷的去除效果对比,COD、、2、3、4.2OCOOGOCOD、、Table2RemovalefficiencyofCOD,N,andPinOCOorOGOCOD/(mgL-1)NH+4-N/(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()45～14183————6.9～21.216.3311～57(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+4-N,;COD90%,NH+4-N80%,.OGOTN、TP,TP7.09mgL-116.33mgL-1,TN56.5%70.8%,TP68.2%80.4%;OGOTNTP2.7%1.37%,,.1297　　　　　　　　　　263　TNFig.3　RemovaleffectofTNinOCOorOGO4　TPFig.4　RemovaleffectofTPinOCOorOGO5　C-DOFig.5　DistributiontrendofDOininner-loopzero3.2　内环缺氧区DO分布C-A、B、C、D(1)DO5.,C-DO,OGODO,C-DO0.5mgL-1.,D,DO.3.3　流态试验,,,OGOOCO,.,,.6.,OGOOCO(tc)33min15min.12988:OGO6　Fig.6　Retentiontimedistributioncurveofreactor4　(Discussions)4.1　OGO反应器生物脱氮除磷特性OCOC-,,,,.,TP68.4%,,(Sidatetal.,1999).,NO-3-N,,.,,,、、、、(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)VQ　　　　　　　　　　t(1-f1)VQ　　　(2)E(t)=0　　　　　　0t≤(1-f1)VQ　　　　　　　　　　　　　　　　　　　(3)　　tc=(1-f1)VQ(4),f1;(1-f1).,.,,;,.,,5.9%12.9%,7%.,OGO2,1299　　　　　　　　　　26,,,,.4.3　反应器混合区水力特性分析,、,.C-,,(,1998).,、.,,,.7.,,C-,,,.,,.7　Fig.7　Mixinghydrauliccharacteristicsinmixingzero5　(Conclusions)1)OGO、NH+4-N,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):79—83CaoRY,FuJZ.2001.Measuresforimprovingvelocitydistributioninoxidationditch[J].ChinaWaterWastewater,17(2):16～18(inChinese)ChemicalIndustryPress.2001.Typicalexampleinwatertreatmentengineering[M].Beijing:ChemicueIndustryPress,173