AO池pH值与脱氮的关系0f425e0e6c85ec3a87c2c572

26520065ActaScientiaeCircumstantiaeVol.26,No.5May,2006:-()(No.50521140075);SupportedbytheNationalNaturalScienceFoundationofChina(No.20377003);TheOpenProjectofKeyLaboratoryofBeijing:(1976),,;3(),E2mail:[e-mail]:MAYong(1976),male,Ph.D.;3Correspondingauthor,E2mail:[e-mail],,,.2006.A/O()[J].,26(5):716-721MaY,LiJ,WuXL,etal.2006.A/Opilot2scalenitrogenremovalprocesstreatingdomesticwastewater.Thestudyofnitritationprocesscontrol[J].ActaScientiaeCircumstantiae,26(5):716-721A/O()1,2,3,1,3,31.,,1500902.,3100143.,,100022:2005208219:2006203221:2006203222:A/O,DOpH.,A/ODOpH3,pH,,NO-22N,,NO-22N;,.,,.:A/O;;;DO;pH;:025322468(2006)0520716206:X70311:AA/Opilot2scalenitrogenremovalprocesstreatingdomesticwastewater.ThestudyofnitritationprocesscontrolMAYong1,LIJun2,WUXuelei3,PENGYongzhen1,3,31.SchoolofMunicipalandEnvironmentalEngineering,HarbininstituteofTechnology,Harbin1500902.CollegeofCivilEngineering,ZhejiangUniversityofIndustry,Hangzhou3100143.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022Received19August2005;receivedinrevisedform21March2006;accepted22March2006Abstract:TheDOandpHvariationlawswereinvestigatedinapilot2scaleA/Onitrogenremovalsystemtreatingdomesticwastewater.TheresultsshowedthattheDOandpHvariationsalongtheaerobiczonescouldbeclassifiedintothreerepresentativetypes,andthepHcouldbeusedasnitritationcontrolparameter.Itcouldbeobtainedahighandstablenitriteaccumulationwithon2lineprocesscontrolatlowDOconcentration.However,withouton2lineprocesscontrolnitritewouldbeconvertedtonitrateduetoextendedaerationwhennitritationfinished.Inaddition,usingon2lineprocesscontrolcouldnotonlyimprovethenitrogenremovalefficiency,butalsosaveoperationalcost.Keywords:A/Onitrogenremovalprocess;domesticwastewater;on-lineprocesscontrol;DO;pH;nitriteaccumulation.,,,.,.,,.,.5:A/O()DOA/O(,2006;,2006),.,,,,,.NO-22N,.,,.A/O,.DOpH,,SBR(Yuetal.,1998),SBR,ORP,pH(Choetal.,2001;Pauletal.,1998).SBR,DOORP,pH(Changetal.,1996;Haoetal.,1996),,SBR.DOpHORPA/O(Maetal.,2005),A/ODOpH,DOpH,,,.(,2006).1(Experimentalresults)1.1DOpH,DOpH3,.1.1.1DOpH1,DOpH.92mgL-1,COD282.7mgL-1,2,0.5,MLSS3500mgL-1,800Ld-1,HRT9d,DO0.40.6mgL-1.8.2mgL-1,.,14.9mgL-11.1mgL-1,93%.,pH,pH.DO(0.4016mgL-1),.,.1DOpHFig.1Thevariationofnitrogencompounds,DOandpHwhennitrificationnotfinished1.1.2DOpH81.8mgL-1,COD253mgL-1,2,0.5,MLSS3500mgL-1,HRT9h,1.5m3h-1,DO0.50.8mgL-1.2DOpH,,(0.25mgL-1).,,,,,0.5mgL-1,(96%).71726,DO,.pH,,pH,,,pH,pH,.1.1.3DOpH1.8m3h-1,2.34.,.,,,4,56,,,.2,96%68%.,DO0.50.8mgL-1,DO(DO1mgL-1).pH,,pH,pH,.DO,DO.DO.,,,.2DOpHFig.2Thetypicalvariationofnitrogencompounds,DOandpHwhennitrificationfinishedinthelastaerobiczone3DOpHFig.3Thetypicalvariationofnitrogencompounds,DOandpHwhennitrificationnotfinishedinthelastaerobiczone1.1.4DOpHpH,pH;pH;pH.,,;,.23,216.7%.,pH,.pH8175:A/O(),.pHDODO,,2,pH.50%,,.pH,,,.1.2DOpHDO,.,,;,,,;,,,DO;,,DO,,DO,,DO,.pH,CO2.,,CO2,H+,HCO-3HCO-3/CO2,DO,CO2,pH.,CO2H+,,,CO2,HCO-3/CO2,pH.H+,,1g,7.14g(CaCO3),pH.,pH;,,pH.pH.pHpHpH,.1.3DOpHA/O,DOpH4,72.3mgL-1,COD245mgL-1,3,5.2,0.5,HRT9h.pH,4,,,23.7mgL-13.0mgL-1,89%.,pH,45pH0.02,,.DO,,.4pHA/OFig.4TheprocessofnitrificationwiththecontrolinformationofpHdescendingrate9172654COD,1.7m3h-1,4.3,pH,DO30.5mgL-141.25mgL-1.,,,13.8mgL-1,16.1mgL-1,485%46%.45%,20%.,pH,,,.5Fig.5Theprocessofnitrificationwiththeconstantairflowrate1.4COD250mgL-1,DO0.5mgL-1,2,0.5,30Lh-1,,,.6,TN.6,,,,,01mgL-1,,,95%.C/N70.5%,,15%,20%.6TNFig.6Thevariationofnitrogencompounds,ammoniaandTNremovalefficiency,andnitriteaccumulationwiththeproposedcontrolstrategy0275:A/O()2(Conclusions)1)DOpH3,.2)pH,DO.,pH,pH(pH1/5),pH,,,,.3),,,,,,.References:ChangCH,HaoOJ.1996.Sequencingbatchreactorsystemfornutrientremoval:ORPandpHprofiles[J].JChemTechBiotechnol,67(1):2738ChoBC,LiawSL,ChangCN,etal.2001.Developmentofareal-timecontrolstrategywithartificialneuralnetworkforautomaticcontrolofacontinuous-flowsequencingbatchreactor[J].WatSciTech,44(1):95104HaoO,HuangJ.1996.Alternatingaerobic-anoxicprocessfornitrogenremoval:processevaluation[J].WatEnvironRes,68(1):8393MaY,PengYZ,YuanZG,etal.2005.FeasibilityofControllingNitrificationinPredenitrificationPlantsUsingDO,pHandORPSensors[A].The2ndIWAConferenceonInstrumentation,ControlandAutomation[C],Busan:IWA,3341MaY,WangSY,ZengW,etal.2006.A/Opilot2scalenitrogenremovalprocesstreatingdomesticwastewater.Thestudyofshort2cutnitrificationanddenitrification[J].ActaScientiaeCircumstantiae,26(5):703709(inChinese)PaulE,Plisson2SauneS,MauretM,etal.1998.Processstateevaluationofalternatingoxic2anoxicactivatedsludgeusingORP,pHandDO[J].WatSciTech,38(3):299306MaY,PengYZ,YuDS.2006.A/Opilot2scalenitrogenremovalprocesstreatingdomesticwastewater.ThestudyofsystemcharacteristicsandSND[J].ActaScientiaeCircumstantiae,26(5):710715(inChinese)YuR,LiawS,ChangC,etal.1998.Applyingrealtimecontroltoenhancetheperformanceofnitrogenremovalinthecontinuous2flowSBRsystem[J].WatSciTech,38(3):271280:,,,.2006.A/O()[J].,26(5):703709,,.2006.A/O()SND[J].,26(5):710715127