A2OBAF联合工艺处理低碳氮比生活污水彭永臻

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38420124JOURNALOFBEIJINGUNIVERSITYOFTECHNOLOGYVol.38No.4Apr.2012A2O-BAF100124A2O-BAFA2O、.A2O5.6h、9d、100%、200%、BAFHRT30min、6~8mg/L3.21.A2O3∶4∶267.4%98.6%.250%0..X703.1A0254-0037201204-0590-06TreatingLowCarbonandNitrogenRatioSewageWithanA2O-BAFSystemPENGYong-zhenWANGJian-huaCHENYong-zhiKeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineeringCollegeofEnvironmentalandEnergyEngineeringBeijingUniversityofTechnologyBeijing100124ChinaAbstractUsingaA2O-BAFsystemtotreatsewagewithalowcarbonandnitrogenratiothebestvolumeratioofanaerobiczoneanoxiczoneandaerobiczoneofA2Oandnitritereturnratioareinvestigatedandhowtostrengthendenitrifyingdephosphatationisalsoresearched.ResultsshowthatundertheconditionsofhydraulicretentiontimeHRT5.6hsludgeretentiontimeSRT9dsludgereturnratio100%nitraterecycleratio200%ofA2OHRT30minandeffluentρDO6-8mg/LofBAFthereexistsdephosphatationinthesystem.Whenthevolumeratioofanaerobic/anoxic/aerobiczoneis3∶4∶2whichnotonlysatisfiesthedevelopmentofPAOsbutalsosuppressesreproductionofnitrifyingbacteria67.4%ofTNand98.6%ofTPareremoved.Withthesamevolumeratiowhenthenitratereturnratiois250%thedephosphatationefficiencyisthebest.MostofPAOshavethedenitrifyingdephosphatationabilityandtheeffluentnitratenitrogenandTParenearly0.Thetwo-sludgesystemcanfullyexertadvantagesoftheactivatedsludgeprocessandbiologicalmembranetechnology.Itisasuitablesystemfortreatinglowcarbonnitrogenratiosewageandcanachieveadvancedphosphorusandnitrogenremoval.Keywordscarbonandnitrogenratiovolumerationitratereturnratio2010-01-07.“”2008ZX07317-007-005.1949—E-mailpyz@bjut.edu.cn.4A2O-BAFA2O、hydraulicretentiontimeHRT、、、.21-3.A2OA2O-BAFA2O、、biologicalaerobicfilterBAFBAFA2O.A2O2.BAF4-7.PHA.A2O-BAF50%chemicaloxygendemandCOD30%50%8-9.A2OBAF2A2O、、.11.1A2O-BAF6、A2O、、、BAF1.A2O930L.A2O129.6L/dHRT5.6hmixedliquidsuspendedMLSS2500mg/LsludgeretentiontimeSRT9d200%100%A2O21L.BAF15LHRT30min.、、BAF.1A2O-BAFFig.1SchematicdiagramoftheA2O-BAFsystem1.21.ρC/ρN3.21.CODCODNH+4-NNO-2-NN-1--NO-3-NρMLSST、pHdissolvedoxygenDOWTWinolablevel2.19520121Table1CharacteristicsofinfluentwastewaterρCOD/mg·L-1ρTN/mg·L-1ρPO3-4-P/mg·L-1ρC/ρNρC/ρP138.2~244207.853.6~69.764.83.34~9.575.43.2138.5A2O-BAFA2ODPAOsPAOs.A2O2L22LSBR200mg/L.2h221ρDO=2mg/L2h150mg/L2hDPAOsPAOs10-11.1.31A2O、.ⅠV∶V∶V=1∶2∶6ⅡV∶V∶V=2∶3∶4ⅢV∶V∶V=3∶4∶22100%、200%、250%、300%.22.1A2O、、2~4A2OⅠ、Ⅱ、Ⅲ1COD、NH+4-N、NO-3-N、NO-2-NTP.CODA2O、、COD380%PHACOD10%3COD80%.NH+4-NA2OA2O.BAFρNH+4-NρNH+4-NA2OA2O.2~421∶2∶6Fig.2Changeratioofeachindexduringacyclewithavolumeratioof1∶2∶61—2—13—24—15—26—37—18—29—310—411—12—32∶3∶4Fig.3Changeratioofeachindexduringacyclewithavolumeratioof2∶3∶43NH+4-NBAF.NH+4-N100%ρNH+4-N.TP3ρTPρC/ρN=3.212954A2O-BAF1—2—13—24—15—26—37—18—29—310—411—12—43∶4∶2Fig.4Changeratioofeachindexduringacyclewithavolumeratioof3∶4∶2.Ⅲ51.3mg/L45.9mg/L4.45mg/LTP/TP1.204.PAOsDPAOs.NO-3-NBAFA2ONO-3-N2A2ONO-3-NBAFNH+4-NNO-3-NρNO-3-N2.A2OBAFρNH+4-NA2OρNO-3-N.ρNO-3-N=0CODCODDPAOs12DPAOsρNO-3-NρCOD.ⅠNO-3-NⅡNO-3-NⅢCODρNO-3-NρTP.NO-2-NNO-2-N.ⅢA2O-BAFA2O.5A2OⅠ~ⅢρNO-3-NTN.ⅠρNO-3-N.3ρNO-3-N19.05、16.1511.94mg/LA2OρNO-3-NⅢρNO-3-N0TP.3ρTNρNO-3-N.、TN.5Fig.5Changeofnitrateandtheremovalrateoftotalnitrogenundertheconditionofdifferentvolumeratio2.2.6、3∶4∶2100%、200%、250%300%.250%250%74.4%98.2%.3952012250%ρNO-3-N.300%.6Fig.6RemovalradiochangeofTNandTPatdifferentnitraterecycleradiosρNO-3-N7250%87.3%ρNO-3-NρTP0.780.67mg/LρNO-3-NρTP1mg/LρNO-3-N=0“”.A2O-BAFρC/ρN=3.21A2O3∶4∶2250%.2.3A2O213-14.8ρC/ρNg1h19.78mgg1h15.24mg0.771.A2O-BAF7Fig.7Changeoftheanoxicnitrateeffluentandanoxicuptakeratioatdifferentnitraterecycleratios8、Fig.8Phosphorusreleaseanduptakeunderanaerobic-anoxicandanaerobic-aerobicconditionsA2O.31A2O-BAFρC/ρN3.21A2O3∶4∶267.4%98.6%.2A2O3∶4∶2250%ρNO-3-NρTP0.3.2.4954A2O-BAF1KUBETVANMCHEIJINENJJ.PhosphorusandnitrogenremovalwithminimalCODrequirementbyintegrationofdenitrifyingdephosphatationandnitrificationinatwosludgesystemJ.WaterResearch19963071702-1710.2SUJLOUYANGCF.Advancedbiologicalenhancednutrientremovalprocessesbytheadditionofrotatingbiologicalcontactors.WaterScienceandTechnology1997358153-160.3DINGYWWANGLWANGBZetal.RemovalofnitrogenandphosphorusinacombinedA2/O-BAFsystemwithashortaerobicSRTJ.JournalofEnvironmentalSciences-China20061861082-1087.4BANUJRUANDKCHUNGIJetal.AstudyontheperformanceofapilotscaleA2/O-MBRsystemintreatingdomesticwastewaterJ.JournalofEnvironmentalBiology2009306959-963.5CHUANGSHOUYANGCFYUANGHCetal.EffectsofSRTandDOonnutrientremovalinacombinedAS-biofilmprocessJ.WaterScienceandTechnology1997361219-27.6LEEJMCHOIISWIESMANNU.TestofporousceramicmaterialfortheimmobilisationofpredominanlynitrifyingbacteriaandfortheimprovementoftheAAOprocessJ.EngineeringinLifeSciences20044131-37.7YOUSJCHUANGSHOUYANGCF.NitrificationefficiencyandnitrifyingbacteriaabundanceincombinedAS-RBCandA2OsystemsJ.WaterResearch200337102281-2290.8MURNLEITNEREKUBATVANMCetal.AnintegratedmetabolicmodelfortheaerobicanddenitrifyingbiologicalphosphorusremovalJ.BiotechnolologyandBioengineering199754434450.9MERZOUKIMBERNETNDELGENESJetal.Biologicaldenitrifyingphospho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