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CNMUCT1,2,1,2,2,2(1., 150090;2., 130021):CN,MUCT.,①1COD,,DPB,;②2DPBPHB,,,0.93mgL18mgL,40%;③3,COD,,0.27～3mgL;④COD、TN、TP,TNTP10mgL0.9mgL.:MUCT;;DPB;;:X703.1 :A :0250-3301(2007)11-2478-06:2006-11-22;:2007-01-06:(20040405-1):(1954～),,,,,E-mail:smile-xl@tom.comCharacterofDenitrifyingPhosphorusRemovalUsingMUCTProcess:OperationatLowCNRateYINJun1,2,WANGXiao-ling1,2,WUXiang-hui2,WULei2(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.DepartmentofEnvironmentalEngineering,JilinArchitecturalandCivilEngineeringInstitute,Changchun130021,China)Abstract:TheeffectofphosphorusuptakeintheanaerobiczoneofMUCTprocessfedwithlowCNratewastewaterwasstudied.Theexperimentalresultsshowsthat:①BecauseoftheconcentrationoftheCODisrelativehigher,nitrateisfirstlyusedbythetraditionaldenitrifyingbacteriainthecyclesludge,andcannotactastheelectronacceptorforDPB.Sothemainactioninthefirstanaerobiczoneisphosphaterelease;②TheDPButilizesthePHBasthecarbonstoredintheanaerobiczone,andnitrateaselectronacceptortouptakephosphorusandtheamountincreasesdailyfrom0.93mgLto18mgL,andtheanaerobicphosphorusratestabilizesto40percentfinallyinthesecondanaerobiczone;③TheineffectivephosphorusreleaseprocessoccursinthethirdanaerobiczonebecausethelowernitrateandCODconcentration,andphosphatereleaseamountisfrom0.27to3mgL;④TheCOD、TN、TPremovalratesarehigherandtheTPandTNconcentrationineffluentisbelow10mgLand0.9mgLrespectively.Keywords:MUCTprocess;denitrifyingphosphorusremoval;DPB;anaerobicphosphorusuptakeamount;aerobicphosphorusaccumulationamount ,.,,[1].,,(detrifyingphosphorusremovingbacteria,DPB).DPB[2～4],NO-3,β(PHB),“”,,NO-3.NO-3,COD30%,20%,30%[5～9].(biologicalnutrientremoval,BNR),UCT(UniversityofCapeTown),BNR,[10].Genemuiden、Holten、Hardenberg、Oresudsverket.,CN6～9,,,DPB,,DPB[11～13].UCTCN,MUCTCN,,,,.2811200711 ENVIRONMENTALSCIENCEVol.28,No.11Nov.,2007DOI:10.13227/j.hjkx.2007.11.0091 1.1 MUCT1.,,3,、、,:2,3,5.90L,18L,27L,45L.,.,..,.1 MUCTFig.1 Experimentalset-upofMUCTprocess 、a(52)、γ(11)S.20～22℃,pH7,DO2～4mgL[14].1.2 COD、TP、TN、NH+4-N、NO-3-N、pH、、DO、ORP、MLSS,..DO、ORP、pHWTW-pHOXi340.1.3 .:,,SVI80.,()2d,,MUCT.,.25d,2.76mLL、0.12gL、0.03gL、0.05gL、0.01gL、0.25gL.1.10Lh,、、HRT1.8h、2.7h、4.5h,S1,a2.5、γ1,、1、2、3:11%、11%、11%、11%、56%,15d,Hao[15].1 mg·L-1Table1 Characteristicsofinfluentwastewatermg·L-1CODBOD5 NH+4-NTNTP～359.7～198.66215.4～110.9349.18～2051.28～22.2512.1～4.91269.31161.4839.341.407.16 25d,,,,23.COD、,,.2.2 MUCTTable2 RuncyclesofexperimentsofMUCTprocessⅠ(0～25d)Ⅱ(26～35d)PAOsⅢ(36～68d)DPB247911:CNMUCT2 Fig.2 Microscopicimagesofzoogloea 3 Fig.2 Microscopicimagesofepistylis 2 2.1 TP4MUCT2TP.4,25d,Ⅱ,,,.Ⅱ25.8%77.9%,1.071.18.Ⅲ,,85.4%～99.8%(40d),0.9mgL.1.15～1.34,[16,17].40d,3.7%,11,1025mgL.,20.6mgL,,,[18].,,,.4,ⅡⅢ,12.,3:、;;.,1,.7,1COD,,,DPB[19],1,.4 TPFig.4 VariationofTPconcentrationofeachreactionzone 5 2Fig.5 Variationofphosphorusuptakeconcentrationofanoxiczone225,,.、6,2480 286 Fig.6 Variationofanoxicandaerobicphosphorusuptakerate ,.5,Ⅱ,2,,DPB,7,2COD,,Ⅱ,,.6,100%,,.MUCTDPB[20,21],,Ⅲ,2,0.93mgL,1.75%.2、.,,DPB,[22],49d16.07mgL,36.6%.,,40%.DPB(5),(6).3,ⅡⅢ,.Ⅱ3.12～11.20mgL,Ⅲ0.27～3.11mgL.ⅡDPB,,3.Ⅲa,,0.5mgL,DPB,[23].7,ⅢPHB,12DPB,3,,3PHB,,[18],,.,3,,a.7 CODFig.7 VariationofCODconcentrationofeachreactionzone 2.2 COD72COD.,25d,,[24],COD,COD.,COD198.66～359.7mgL,COD3.01～17.29mgL,COD94.1%～99.0%,97.3%.,7,COD,COD24.08～120.40mgL,70.5%～85.6%,81.2%.、COD,、DPB[25].2.3 NH+4-N、TN8,25d,,Ⅱ.,,,.20248111:CNMUCT～49.18mgL,0～4.12mgL,1.5mgL,89.9%～100%,96.7%.,DPB[25].8 NH+4-NFig.8 VariationofNH+4-Nconcentrationofeachreactionzone 92TN.9,TN22.25～51.28mgL,3.89～9.78mgL,78.9%.CN,TN,,,,,.9 TNFig.9 VariationofTNconcentrationofeachreactionzone 3 (1)CNMUCTCOD,,COD3.01～17.29mgL,97.3%,81.2%.、DPB.(2)CNMUCT,NH+4-N96.7%.DPB.TN3.89～9.78mgL,78.9%.CN,1,,.(3),Ⅲ,85%～99%,0.9mgL.,1.2,,,DPB,2,0.93mgL,18mgL,1.75%36.6%,40%.,3,ⅡDPB,Ⅲa.:[1]ChuangSH,OuyangCF.Thebiomassfractionofheterotrophsandphosphateaccumulatingorganismsinanitrogenandphosphoruremovalsystem[J].WatRes,2000,34(8):2238～2290.[2]BortoneG,MarsiliLS,TilcheA,etal.AnoxicphosphateuptakeintheDEPHANOXprocess[J].WatSciTech,1999,40(4～5):177～185.[3]WachtmeisterA,KubaT,vanLoosdrechtMCM,etal.Asludgecharacterizationforaerobicanddenitrifyingphosphorusremovingsludge[J].WatRes,1997,31(3):471～478.[4]MinoT,VanLoosdrechtMCM,HeijnenJJ.Microbiologyandbiochemistryoftheenhancedbiologicalphosphateremovalprocess[J].WatRes,1998,32(11):3193～3207.[5]KubaT,VanLoosdrechtMCM,HeijnenJJ.Phosphorusremovalfromwastewaterbyanaerobic-anoxicsequencingbatchreactor[J].WatSciTech,1993,27(5～6):241～252.[6],,,.、[J].,2003,19(1):33～36.[7]KerenJespersenJP,HenzeM.Biologicalphosphorsuptakeunderanoxicandaerobicconditions[J].WatRes,1994,5(28):1253～1255.[8]ChuangSH,OuyangCF,WangYB.Kineticcompetitionbetweenphosphorusreleaseanddenitrificationonsludgeunderanoxiccondition[J].WatRes,1996,30(12):3961～3968.[9]KubaT,VanLoosdrechtMCM,HeijnenJJ.PhosphorusandnitrogenremovalatwithminimalCODrequirementbyintegrationofnitrificationinatwo-sludgesystem[J].WatRes,1996,42(1～2):1702～1710.[10],,,.[M].: