AO脱氮工艺实时控制对策的试验研究杜红

A/O1,2,1,3＊,1(1.,　150090;2.,　518031;3.,　100022):,A/O(anoxic/oxic).DO.,().,,DO、、,,,.:A/O;;;:X703.1　:A　:0250-3301(2005)04-0100-06:2004-05-16;:2005-01-15:(863)(2003AA60110);(H020620010120);:(1967～),,,.＊ExperimentStudyonReal-TimeControllingRulesofA/ONitrogenRemovalProcessDUHong1,2,MAYong1,PENGYong-zhen2,WANGBao_zhen1(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.ShenzhenWaterGroupCo.Ltd.,Shenzhen518031,China;3.KeyLaboratoryofBeijingWaterEnvironmentRecovery,BeijingUniversityofTechnol-ogy,Beijing100022,China)Abstract:TheaimofthisworkisoperationaloptimizationofanA/Oprocessinthelabplantwithsyntheticwastewaterforimprovingnitrogenremovalefficiency.Ammoniacontrolaimsatmaintainingtherequiredconcentrationofammoniaintheeffluentbymanipulat-ingthedissolvedoxygen(DO)setpointandaerationvolumes.Nitratecontrolaimsattheoptimaluseofthedenitrificationpotentialatanymomentbycontinuouslyadjustingtheinternalrecirculationflowor(and)externalcarbonadditionflowinordertomaintainadesirednitratesetpointintheanoxiczone.Thecontrolstrategieshavebeenbasedonahierarchicalstructurewhereahighlevelorsu-pervisorycontrolselectsthesetpointofthelowlevelorconventionalcontrollers.Resultsindicatedthatitwaspossibletoincreaseni-trogenremovalefficiency,improvetheeffluentwaterquality,saveenergy,andreduceoperatingcosts.Keywords:A/Onitrogenremovalprocess;real-timecontrol;ammoniacontrol;nitratecontrol　　,,,,[1],.1　A/OA/O,,,.,,A/O6:、、、,(),,[2～5].,;,;,;,C/N,,,;,.,,,4,,26420057　　　　　　ENVIRONMENTALSCIENCEVol.26,No.4Jul.,2005DOI:10.13227/j.hjkx.2005.04.019h、d.8h、,,4A/O.2　2.1　,1,6,1,23,4、56,48L,,20L.、,144L/d,20℃±1℃,HRT、SRT8h12d,MLSS2300mg/L,400mg/L,0.75,DO,.1　A/OFig.1　SchematicdiagramofA/Onitrogenremovalprocess2.2　,COD,BOD5/COD=0.55,NaHCO3pH7.5.(g/L):(0.2～0.6),(0.1～0.30),KH2PO4(0.02～0.033),NaHCO3(0.05～0.15),MgSO4·7H2O(0.09),CaCl2·2H2O(0.03),FeSO4·2H2O(0.003).COD、NH+4-N、NO-3-N、NO-2-N、TN、pH、、DO、ORP、MLSS.,.DOWTW-300i,pHORPHANNA.3　3.1　DO,DO.DO,NH+4-N2(a),2,,COD320mg/L、2,DO2.5mg/L.2(b),DONH+4-N,NH+4-NNH+4-N,NH+4-N85.7mg/L,NH+4-N21.3mg/L;NH+4-N,NH+4-N0.,,.DONH+4-N,NH+4-N,DO,NH+4-N;NH+4-N,DO.NH+4-N,,,.DONH+4-NDO,DO,NH+4-N(4mg/L).2(c),DONH+4-N,NH+4-N,DO,,NH+4-N,NH+4-N,NH+4-NDO21.2mg/L9.23mg/L,1014　　　　　　NH+4-N4.2mg/L,DONH+4-N4.91mg/L,NH+4-N14.4%.NH+4-N,DO,DO9.6%.2(d)DODONO-3-N,.DODO,NH+4-N,.3.2　2　DODOFig.2　ThecomparisonsofconstantDOandcascadeDOcontrolrule　　DO,NH+4-N,NH+4-N,DO,2(c)DO3.5mg/L.DO,DO,DO,,.DO6.1mg/L,NH+4-N9.5mg/L,NH+4-N,;NH+4-N,NH+4-N,DO,2(c)0.4mg/L,,,DO.DO,DO(3.5mg/L)(1mg/L),DO,,,,NH+4-N,,.DO,,,.3NH+4-N、NO-3-N、DO.,DO,NH+4-N,NH+4-N,NH+4-N3.97mg/L,DONH+4-N6%,9%,NO-3-N5.5%,NO-3-N,.3.3　2,.4(a)COD320mg/L、50.5mg/L、DO2～3mg/L、0.75NH+4-N、NO-3-N、TN2NO-3-N.4(a),,TNNO-3-N,1,102　　　　　　263　Fig.3　Theresultsofaerobicvolumescontrolrule　　　　NO-3-NTN,2NO-3-N2.02mg/L,,NO-3-NTN.4(b)COD450mg/L、NH+4-N59mg/L,4(a).,TNNO-3-N,2.5,NO-3-NTN,2NO-3-N1.92mg/L,,NO-3-NTN.,NH+4-N.NO-3-N,、,NO-3-N,,,NO-3-N,DO,　　　4　NH+4-N、NO-3-N、TN2NO-3-NFig.4　EffluentNH+4-N,NO-3-N,TNandnitrateconcentrationinthe2ndzoneatdifferentnitraterecirculationratioNO-3-N,NO-3-N1.5～2.5mg/L,.3.4　,NO-3-N,,.,.,..2,,2.5,DO2～3mg/L,COD320mg/L,NH+4-N58mg/L,COD1000mg/L,1.5NH+4-N、NO-3-N、TN、2NO-3-N.5,TN、NO-3-N2NO-3-N,,NH+4-N.,C/N,,NO-3-NTN,20.7mg/L26.1mg/L.11.4L/d,NO-3-NTN,9.9mg/L、15.4mg/L,NO-3-N52.2%,TN42.1%,2NO-3-N1.02mg/L,3%14%.1034　　　　　　5　NH+4-N、NO-3-N、TN,2NO-3-N、Fig.5　EffluentNH+4-N,NO-3-N,TN,nitrateinthesecondandaeration,sludgeincrementatdifferentcarbondoseflow32L/d,NO-3-NTN7.2mg/L、13.14mg/L,　　　11.4L/dNO-3-NTN,2NO-3-N0mg/L,,,27.2%58%.NO-3-N1～1.5mg/L,NO-3-N,.,NO-3-NTN,2,NO-3-N,NO-3-N,TN.4　6.6　Fig.6　Thecomparisonsofcontrolrule4.1　6(a)(d),NH+4-N.①NH+4-N.,NH+4-NNH+4-N,104　　　　　　26DO,,.②NH+4-N,A/O(,).DO,NH+4-N,,;DO,,.,(),.4.2　6(b)(c),NO-3-N.,,NO-3-N.NO-3-NNO-3-N(1.5～2.5mg/L).NO-3-N,NO-3-N,,,;,NO-3-N,,,TN.C/N,,(),NO-3-NNO-3-N(1～1.5mg/L).5　,A/ONH+4-N、NO-3-N,,、、4.,DO()NH+4-N,NH+4-N;(),,NO-3-N.,NH+4-NTN,,.:[1]　IngildsenP,WendelboeH.Improvednutrientremovalusinginsitucontinuouson-linesensorswithshortresponsetime[J].Wat.Sci.Tech.,2003,48(1):95～102.[2]　SerraltaJ,RlbesJ,SecoA,FerrerJ.Asupervisorycontrolsys-temforoptimizingnitrogenremovalandaerationenergycon-sumptioninwastewatertreatmentplants[J].WatSciTech.,2002,45(4-5):309～316.[3]　SamuelssonP,CarlssonB.Controloftheaerationvolumeinanactivatedsludgeprocessfornitrogenremoval[J].Wat.Sci.Tech.,2002,45(4-5),45～52.[4]　ZhiguoY,AdrianO,inglldsenP.Controlofnitraterecircula-tionflowinpredenitrificationsystems[J].Wat.Sci.Tech.,2002,45(4-5):29～36.[5]　ZhiguoY,BogaertH.Controlofexternalcarbonadditiontopredenitrfyingsystems[J].J.Envir.Eng.,1997,123(11):1080～1086.1054