A2OBAF联合工艺处理低碳氮比生活污水彭永臻

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-mail]．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