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59 12 Vol.59 No.12 200812 Journal of Chemical Industry and Engineering (China) December 2008A2OC/N吴昌永1,彭永臻1,2,彭 轶1(1,150090;2,100022):52.5LA2O,A2OC/N,。://1/1/2、HRT8h、70%、300%C/N7.89,TNSOP85.4%93.3%,,25.3%。C/N4.20,SOP,TN62.2%,TN20mg·L-1。,,/5/8,TN70.7%,55.2%。250%,TN77.3%。A2O,,C/N。:;;;A2O:X701.3 :A:0438-1157(2008)12-3126-06BiologicalnutrientremovalinA2OprocesswhentreatinglowC/NratiodomesticwastewaterWUChangyong1,PENGYongzhen1,2,PENGYi1(1StateKeyLaboratoryofUrbanWaterResourceandEnvironment,HarbinInstituteofTechnology,Harbin150090,Heilongjiang,China;2KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022,China)Abstract:InordertoinvestigatetheperformanceofbiologicalnutrientsremovalanddenitrifyingphosphorusremovalintheA2OprocesswhentreatinglowC/Nratiodomesticwastewater,areactor,withaworkingvolumeof52.5L,wasusedinthisstudy.Thevolumeratioofanaerobic/anoxic/aerobiczonewas1/1/2andthemajoroperatingparameterswere:HRT8h,sludgerecycleratio(r)70%,aerobic(nitrate)recycleratio(R)300%.Theresultsshowedthat85.4%ofTNand93.3%ofSOPcouldberemovedwhentheC/Nratiowas7.89.Therewasdenitrifyingphosphorusremovalinthesystem.Moreover,upto25.3%oftheSOPcouldberemovedintheanoxiczonebythisway.TheTNremovalefficiencywasreducedto62.2%whendecreasingtheC/Nratioto4.20withthesameoperatingparameters.However,theSOPremovalefficiencywaskeptover96.0%.TheTNremovalefficiencywas70.7%andupto55.2%ofSOPwasremovedintheanoxiczonewhenchangingthevolumeratioof 2008-04-02,2008-09-12。:。:(1980—),,。:-(50628808);-(PXM2008-014204-050843)。 Receiveddate:2008-04-02.Correspondingauthor:Prof.PENGYongzhen.E-mail:pyz@bjut.edu.cnFoundationitem:supportedbytheJointResearchFundforOverseasNaturalScienceFoundationofChina(50628808)andtheProjectofScientificResearchBaseandScientificInnovationPlatformofBeijingMunicipalEducationCommission(PXM2008-014204-050843). anoxic/aerobicto5/8.Withthesameanoxic/aerobicratio,whenchangingtheaerobic(nitrate)recycleratioto250%,themaximaldenitrifyingphosphorusremovalcouldbeachieved,removing77.3%oftheTNfromthesystem.EnhanceddenitrifyingphosphorusremovalintheA2Oprocessisaneffectivewaytocounteractthedisadvantagesofcarbonshortageforbiologicalnutrientsremoval.Keywords:wastewatertreatment;biologicalnutrientsremoval;denitrifyingphosphorusremoval;A2Oprocess ,,C/N。,C/N2.86kgCOD·(kgN)-1,,4.00kgCOD·(kgN)-1[1],,COD/TN5,。,,C/N,BOD591mg·L-1,TN30mg·L-1[2]。A2O(--),、、、,,。A2O,,[3],。,(DPB),“”,。A2O,C/N,。,A2O,C/N,。A2O,C/N,,C/NA2O,A2OC/N。1 1.1 A2O1。,--。52.5L,9,,2,2,5,、1∶1∶2。,。21～22℃。26.0L。1 A2OFig.1 SchematicdiagramofA2Oprocess1—feedtank;2—peristalicpump;3—anaerobiczone;4—anoxiczone;5—aerobiczone;6—stirrer;7—airflowmeter;8—aircompressor 、。:157.5L·d-1,HRT8h,·3127· 12 :A2OC/NSRT15d,MLSS3500～4000mg·L-1,70%。,。,A/O,。1.2 ,,COD,NH4ClKH2PO4。:COD372.8mg·L-1;NH+4-N41.30mg·L-1;PO3-4-P3.86mg·L-1,C/N:COD241.0mg·L-1;NH+4-N47.40mg·L-1;PO3-4-P7.76mg·L-1。:MLSS、MLVSS、COD、NH+4-N、TN、NO-2-N、NO-3-N、PO3-4-PSOP。。。(PAOs)(DPAOs)Wachtmeister[4]。,4LSBR,(COD=300.0mg·L-1)2h,,3h,50.00mg·L-1NO-3-N3h,Kanox/KaerDPAOsPAOs。1.3 A2O(mg·L-1),Pan=QRco+(Qin+Qr)caQin+QR+Qr-can Qin,L·h-1;QR,L·h-1;Qr,L·h-1;caPO3-4-P,mg·L-1;canPO3-4-P,mg·L-1;coPO3-4-P,mg·L-1。1.4 50d,,3。Ⅰ:;Ⅱ:C/N;Ⅲ:,C/N。2 [3,5],[6]。,,,DPAOsPAOs。2.1 A2OC/N ,A2O,300%,70%。246d3SRTC/N。,COD/TN7.89,:TN47.20mg·L-1,TN6.90mg·L-1,85.4%,,;SOP8.42mg·L-1,SOP0.56mg·L-1,93.3%。,Ⅰ,25.3%,DPAOsPAOs15%～20%。A2O。2.2 A2OC/NⅠ,:TNSOP,COD,COD/TN4.20。36d,SRT。336d。,C/N,,SOP7.36mg·L-1,SOP0.25mg·L-1,96.6%,Ⅰ·3128· 59 。,TN20mg·L-1,62.2%。,C/N,TN,,,TN,C/N,TN。COD,COD,:NO-3-N,PAOsPHAs。,(PHAs)———,,[7],2h,。,,,45.4%,Ⅰ25.3%。DPAOsPAOs31%～40%。,。2.3 2.2,,。,:,;。,,1/25/8,。4。,,SOP96.0%,TN,62.2%70.7%,TN15.60mg·L-1,20mg·L-1。4 TNSOPFig.4 TNandSOPremovalprofilesbeforeandafteranoxictoaerobicvolumeratioadjustment□influTN;◆effluTN;△influSOP;■effluSOP ,55.2%,DPAOsPAOs51.5%。5。,,,。A2O//1/1/(3～4),C/N。,C/N,,。·3129· 12 :A2OC/N5 、Fig.5 Phosphorusreleaseanduptakeunderanaerobic-anoxicandanaerobic-aerobicconditions 2.4 (R):①,,,,,;②,;③,DO,,。5/8,,200%、250%300%。6RTN、SOP。,SOPR,RTN,R=2.5,77.3%,TN11.34mg·L-1,。SOP,R=2.560.4%,A2O,C/N。3 (1)52.5LA2O,HRT8h,70%,300%,TNSOP85.4%93.3%。,25.3%。(2),C/N6 RTN、SOPFig.6 RelationshipbetweenRandTN,SOPremovalefficiency 4.20,,SOP96.6%,TN62.2%,TN20mg·L-1。(3),,55.2%。SOP96.0%,TN70.7%。(4)200%、250%300%,250%,,,TN77.3%。(5)A2OC/N,C/NTN,SOP,,,,。References[1] HenzeM.Capabilitiesofbiologicalnitrogenremovalprocessesfromwastewater.WaterSci.Technol.,1991(23):669-679[2] MaPeishun(),WangHailing(),ChengLihua().CurrentstatusanddevelopmentofurbanwastewatertreatmentinKunming.ChinaWater&Wastewater(),2003,19(4):19-22[3] WangXiaolian(),WangShuying(),MaYong(),PengYongzhen().Anoxicbiological·3130· 59 phosphorusremovalandeffectofexcessiveaerationonbiologicalphosphorusremovalinA2Oprocess.JournalofChemicalIndustryandEngineering(China)(),2005,56(8):1565-1570[4] WachtmeisterA,KubaT,vanLoosdrechtMCM.Asludgecharacterizationassayforaerobicanddenitrifyingphosphorusremovingsludge.Wat.Res.,1997,31(3):471-