后曝气池HRT对改进型A2N工艺脱氮除磷性能的影响

30920109ActaScientiaeCircumstantiaeVol．30No．9Sep．2010No．PHR20090502No．PXM2008_014204_050843SupportedbytheFundingProjectforAcademicHumanResourcesDevelopmentinInstitutionsofHigherLearningUndertheJurisdictionofBeijingMunicipalityNo．PHR20090502andtheProjectofScientificResearchBaseandScientificInnovationPlatformofBeijingMunicipalEducationCommissionNo．PXM2008_014204_0508431985—[e-mail]*[e-mail]1985—[e-mail]*[e-mail]-aerobictankHRTonthenutrientremovalperformanceofamodifiedA2NprocessJ．ActaScientiaeCircumstantiae3091772－1777HRTA2N*1001242009-12-172010-03-042010-04-20A2NHRTSNDA2N．HRT1．3hTP90%TN75%8．6mg·L－1SND．HRT2．3hTN80%TP95%2．2mg·L－1TN2．42mg·L－1．HRT4h、6hTP60%CODTNHRTTN60%．HRT．A2N0253-2468201009-1772-06X703．1AEffectofre-aerobictankHRTonthenutrientremovalperformanceofamodifiedA2NprocessWANGXimingLIUYingPENGYongzhen*SchoolofEnvironmentalandEnergyEngineeringBeijingUniversityofTechnologyBeijing100124Received17December2009receivedinrevisedform4March2010accepted20April2010AbstractBiofilmwasaddedtothere-aerobictankofanA2Ndenitrifyingphosphorousremovalprocessinordertoenhancenutrientremovalperformance．Theeffectofre-aerobictankhydraulicretentiontimeHRTonthenutrientremovalperformanceandsimultaneousnitrificationanddenitrificationSNDinthere-aerobictankwereinvestigatedinthismodifiedprocesstreatingdomesticwastewater．HighaveragetotalphosphorusTPremovalefficiencyof90%andaveragetotalnitrogenTNremovalefficiencyof75%couldbeachievedatare-aerobictankHRTof1．3h．Howeveraverageeffluentammoniumconcentrationwashigh8．6mg·L－1andSNDwasnotobserved．TheaverageTPremovalandTNremovalefficiencieswere95%and80%respectivelyatare-aerobictankHRTof2．3h．Correspondinglytheeffluentammoniumconcentrationwasbelow2．2mg·L－1andthenetamountofTNremovedviaSNDinthere-aerobictankwas2．42mg·L－1．Afterprolongingthere-aerobictankHRTto4hand6htheaverageTNandTPremovalefficienciesdecreasedto60%．TheTNlossviaSNDdidnotincreasedistinctlywithincreasingofre-aerobictankHRTsincelessdegradableCODwasavailableinthere-aerobictank．WedemonstratedthatthenutrientremovalperformancecanbeenhancedbyaddingbiofilmandselectingaproperHRTinthere-aerobictank．KeywordsdenitrifyingandphosphorusremovalA2Nprocessdenitrifyingandphosphorusremovalbacteriare-aerobictankhydraulicretentiontimeHRT9HRTA2N1IntroductionA2N．DPAOspoly-pPO3－4DPAOs-β-PHA．．DPAOsPHANO－3．PO3－4Kubaetal．1996Torricoetal．20082006．．TNTN．PO3－42008．SBBRDOSBBR、Tsunedaetal．2006．DOHRT、TN．A2NC/N、N/PTN．A2NDOHRT、HRTA2N．2Materialsandmethods2．1、、41．、、6．5L、14L、10L14L7．2L4．9L．1A2NFig．1FlowchartofthemodifiedA2Nprocess．．．、3．5．0mg·L－1．DO2．0mg·L－1．1．1Table1InfluentqualityCOD/mg·L－1NH+4/mg·L－1NO－3/mg·L－1TN/mg·L－1TP/mg·L－1pH181．6～342．8259．653．3～76．564．60．5～1．50．954．6～77．465．65．3～8．46．66．8～7．47．23771302．2A2N．TN50mg·L－1COD280mg·L－1KH2PO4TP10mg·L－1．42L·d－130%．HRTHRTTNA2N．2．2Table2Experimentalscheme/LHRT/h/d12．31．32024．02．32037．0420410．56202．3NH+4NO－3NO－2N-1--TN-TP、DO、WTWLevel2DO．3Experimentalresults3．1HRTA2N3．1．1HRTTP2TP10mg·L－1TPHRT．1HRT1．3hTP1mg·L－190%．2HRT2．3hTP1mg·L－195%．3HRT4hTP3mg·L－170%HRT．4HRT6hTP3mg·L－160%．2HRTTPFig．2Effectofdifferentre-aerobictankHRTonTPremovalefficiencyHRTA2NTP．HRT2．3hTP．HRT4hTP．3HRT、Fig．3Effectofdifferentre-aerobictankHRTonanaerobicPreleaseanaerobicphosphorusuptakeandaerobicPuptake3．1．2HRTA2N、、3125．4mg·L－130．6mg·L－13．8mg·L－1TP90%2．2、14．3mg·L－1TP95%2．315．347719HRTA2Nmg·L－117．2mg·L－14．9mg·L－1TPTP70%2．410mg·L－16．4mg·L－140%．TP60%2．12HRTTP90%．3、4HRT、．HRT＜2．3h、TP．HRT4h．3．2HRTA2N4HRTTN、Fig．4Effectofdifferentre-aerobictankHRTonTNremovalefficiencyandeffluentammoniaconcentration3．2．1HRTTN41TN13．5mg·L－1TN75%8．6mg·L－1．2TN10mg·L－1TN80%2．2mg·L－1TN．3TN16．8mg·L－1TN70%TNTN．4TN18．4mg·L－1TN3．1TN．2TN2．34TNTP2．HRT．HRTPHATN．HRT2．3hTN．3．2．2HRTTN51HRT1．3hTNTN0．76mg·L－1TN4．2TN2．42mg·L－1TN．3TN2．94mg·L－1TN．4TN3．16mg·L－13TN．5HRTTNFig．5Effectofdifferentre-aerobictankHRTonTNremovalinthere-aerobictankHRT、DOTNTN577130HRTCODTNHRT4h．HRT2．3hTN．4DiscussionHRTA2N．HRT1.3h8．6mg·L－1TN．HRT4h、6hHRT1．3h15mg·L－1、10mg·L－1TP70%、．PHAPHAHRT4h、6hTN65%．HRT2．3hTP95%TN80%TN≤10mg·L－12.2mg·L－1．SBRDO2008SBRDODPAOs．HRT1．3hTN．HRT2．3hTN2．42mg·L－1．HRT4h、6hCODTN3mg·L－1HRT．A2NHRT2．3hTN、TP、．A2NTN．5Conclusions1HRTA2N．HRT1．3h、2．3h25mg·L－1TP90%．HRT6h10mg·L－1TP60%．2HRTA2NHRT1．3hTN75%8．6mg·L－1．HRT4h、6hTN60%．HRT2．3hTN80%2．2mg·L－1．3HRTTNHRT1．3h、2．3h、4h、6hTN0.76mg·L－1、2．42mg·L－1、2．94mg·L－1、3．16mg·L－1．CODTN．HRT2．3hSND．1949—、、．References．2008．J．24135—39FangQZhangCSZhangKFetal．2008．EffectofdissolvedoxygenondenitrifyingphosphorusremovalbacteriaJ．ChinaWaterandWasteWater24135—39inChineseKubaTVanLoosdrechtMCMHeijnenJJetal．1996．Phosphorusandnitrogenremovalwithminimalcodrequirementbyintegrationofdenitrifyingdephosphatationandnitrificationinatwo-sludgesystemJ．WaterResearch3071702—1710．2006．HRTA2NJ．3727—11LingYFWangSYWangWetal．2006．EffectofanaerobicHRTonA2NdenitrifyingphosphorusremovalprocessJ．TechnologyofWaterTreatment3727—11inChineseTsunedaSOhnoTSoejimaKetal．2006．Simul