AO生物脱氮工艺处理生活污水中试三短程硝化过程控制的研究马勇

26520065　　　　　　ActaScientiaeCircumstantiaeVo.l26,No.5May,2006:-()(No.50521140075);SupportedbytheNationalNaturalScienceFoundationofChina(No.20377003);TheOpenProjectofKeyLaboratoryofBeijing:　(1976—),,;*(),E-mail:[e-mail]:MAYong(1976—),male,Ph.D.;*Correspondingauthor,E-mail:[e-mail]　,　,,.2006.A/O()[J].,26(5):716-721MaY,LiJ,WuXL,etal.2006.A/Opilot-scalenitrogenremovalprocesstreatingdomesticwastewaterⅢ.Thestudyofnitritationprocesscontrol[J].ActaScientiaeCircumstantiae,26(5):716-721A/O()马　勇1,李　军2,吴学蕾3,彭永臻1,3,*1.哈尔滨工业大学,市政与环境工程学院,哈尔滨1500902.浙江工业大学建筑工程学院,杭州3100143.北京市水质科学与水环境恢复工程重点实验室,北京工业大学,北京100022:2005-08-19　　　:2006-03-21　　　:2006-03-22:A/O,DOpH.,A/ODOpH3,pH,,NO-2-N,,NO-2-N;,.,,.:A/O;;;DO;pH;:0253-2468(2006)05-0716-06　　　:X703.1　　　:AA/Opilot-scalenitrogenremovalprocesstreatingdomesticwastewaterⅢ.ThestudyofnitritationprocesscontrolMAYong1,LIJun2,WUXuelei3,PENGYongzhen1,3,*1.SchoolofMunicipalandEnvironmentalEngineering,HarbininstituteofTechnology,Harbin1500902.CollegeofCivilEngineering,ZhejiangUniversityofIndustry,Hangzhou3100143.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022Received19August2005;　　　receivedinrevisedform21March2006;　　　accepted22March2006Abstract:TheDOandpHvariationlawswereinvestigatedinapilot-scaleA/Onitrogenremovalsystemtreatingdomesticwastewater.TheresultsshowedthattheDOandpHvariationsalongtheaerobiczonescouldbeclassifiedintothreerepresentativetypes,andthepHcouldbeusedasnitritationcontrolparameter.Itcouldbeobtainedahighandstablenitriteaccumulationwithon-lineprocesscontrolatlowDOconcentration.However,withouton-lineprocesscontrolnitritewouldbeconvertedtonitrateduetoextendedaerationwhennitritationfinished.Inaddition,usingon-lineprocesscontrolcouldnotonlyimprovethenitrogenremovalefficiency,butalsosaveoperationalcos.tKeywords:A/Onitrogenremovalprocess;domesticwastewater;on-lineprocesscontrol;DO;pH;nitriteaccumulation　　　.,,,.,、.,、,.,、.DOI:牨牥牨牫牰牱牨牤jhjkxxb牪牥牥牰牥牭牥牥牫5　:A/O()DOA/O(,2006;,2006),.,,,,,.NO-2-N,.,,.A/O,.DOpH、、、、,,SBR(Yuetal.,1998),SBR,ORP“”,pH“”(Choetal.,2001;Pauletal.,1998).SBR,DOORP“”,pH“”(Changetal.,1996;Haoetal.,1996),,SBR.DO、pHORPA/O(Maetal.,2005),A/ODOpH,DOpH,、,,.(,2006).1　(Experimentalresults)1.1　DO、pH在好氧区的变化规律,DOpH3,、、.1.1.1　硝化反应未完成时DO和pH在好氧区的变化规律　1,、DOpH.92mgL-1,COD282.7mgL-1,2,0.5,MLSS3500mgL-1,800Ld-1,HRT9d,DO0.4～0.6mgL-1.8.2mgL-1,.,14.9mgL-11.1mgL-1,93%.,pH,pH.DO(0.4～0.6mgL-1),.,.1　、DOpHFig.1　Thevariationofnitrogencompounds,DOandpHwhennitrificationnotfinished1.1.2　硝化反应在最后格室完成或即将完成时DO和pH在好氧区的变化规律　81.8mgL-1,COD253mgL-1,2,0.5,MLSS3500mgL-1,HRT9h,1.5m3h-1,DO0.5～0.8mgL-1.2DO、pH,,(0.25mgL-1).,,,,,0.5mgL-1,(96%).717　　　　　　　　　　26,DO,.pH,,pH,,,pH,pH,.1.1.3　硝化反应提前完成时DO和pH在好氧区的变化规律　1.8m3h-1,2.34.,.,,,4,56,,,.2,96%68%.,DO0.5～0.8mgL-1,DO(△DO1mgL-1).pH,,pH,pH,“”.DO“”,DO“”.DO“”.,,,.2　、DOpHFig.2　Thetypicalvariationofnitrogencompounds,DOandpHwhennitrificationfinishedinthelastaerobiczone3　DO、pHFig.3　Thetypicalvariationofnitrogencompounds,DOandpHwhennitrificationnotfinishedinthelastaerobiczone1.1.4　基于DO和pH在线信息的控制策略　pH,pH;pH;pH.,,;,、.23,216.7%.,pH,.pH7185　:A/O(),.pH“”DO“DO”,,2,pH.50%,,.pH,,,.1.2　DO和pH变化的机理DO,.,,;,,,;,,,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,.1.3　应用DO、pH在线传感器自动控制A/O工艺短程硝化反硝化反应,DO、pH4,72.3mgL-1,COD245mgL-1,3,5.2,0.5,HRT9h.pH,4,,,23.7mgL-13.0mgL-1,89%.,pH,45pH0.02,,.DO,,.4　pH“”A/OFig.4　Theprocessofnitrificationwiththecontrolinformationof“pHdescendingrate”719　　　　　　　　　　26　　54COD,1.7m3h-1,4.3,pH“”,DO30.5mgL-141.25mgL-1.,,,13.8mgL-1,16.1mgL-1,485%46%.45%,20%.,pH,,、、,.5　Fig.5　Theprocessofnitrificationwiththeconstantairflowrate1.4　动态进水负荷在线过程控制的研究COD250mgL-1,DO0.5mgL-1,2,0.5,30Lh-1,,,.6、、,TN.6,,,,,0～1mgL-1,,,95%.C/N70.5%,,15%,20%.6　、、、、TNFig.6　Thevariationofnitrogencompounds,ammoniaandTNremovalefficiency,andnitriteaccumulationwiththeproposedcontrolstrategy7205　: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):27—38ChoBC,LiawSL,ChangCN,etal.2001.Developmentofareal-timecontrolstrategywithartificialneuralnetworkforautomaticcontrolofacontinuous-flowsequencingbatchreactor[J].WatSciTech,44(1):95—104HaoO,HuangJ.1996.Alternatingaerobic-anoxicprocessfornitrogenremoval:processevaluation[J].WatEnvironRes,68(1):83—93MaY,PengYZ,YuanZG,etal.2005.FeasibilityofControllingNitrificationinPredenitrificationPlantsUsingDO,pHandORPSensors[A].The2ndIWAConferenceonInstrumentation,ControlandAutomation[C],Busan:IWA,33—41MaY,WangSY,ZengW,etal.2006.A/Opilot-scalenitrogenremovalprocesstreatingdomesticwastewaterⅠ.Thestudyofshort-cutnitrificationanddenitrification[J].ActaScientiaeCircumstantiae,26(5):703—709(inChinese)PaulE,Plisson-SauneS,MauretM,etal.1998.Processstateevaluationofalternatingoxic-anoxicactivatedsludgeusingORP,pHandDO[J].WatSciTech,38(3):299—306MaY,PengYZ,YuDS.2006.A/Opilot-scalenitr