低DO浓度下AO型SBR工艺除污性能研究左金龙

DOA/OSBR12112121．1500762．150090DOSBR/A/ODO1mg/LDO2mg/L。DOSBRCOD＜40mg/LCOD90%CODDODO90%DO5mg/L37%NO－x－NNH+4－NDODO＞90%＜0．5mg/L。DOSBR/X703C1000－4602201115－0099－04E200931PollutantRemovalPerformanceofA/O-typeSBRProcessunderLowDOZUOJin-long12LIJun-sheng1HUANGLi-kun12CHEChun-bo1WUChang-yong21．ProvincialKeyLaboratoryofFoodScienceandEngineeringCollegeofFoodEngineeringHarbinUniversityofCommerceHarbin150076China2．SchoolofMunicipalandEnvironmentalEngineeringHarbinInstituteofTechnologyHarbin150090ChinaAbstractInordertostudythepollutantremovalefficiencyunderlowDOthepollutantremovalefficiencyatmeanDOvalueof1mg/LinaerobiczoneofsequencingbatchreactorSBRoperatedinanoxic/aerobicA/OmodewasinvestigatedandcomparedwiththatatmeanDOvalueof2mg/L．TheresultsshowthatunderlowDOtheeffluentCODislessthan40mg/LtheCODremovalratecanreachabout90%andtheCODremovalefficiencyisslightlymorethanthatundernormalDO．Theammonianitrogenremovalratecanreachabout90%theammonianitrogenremovalefficiencyislessthanthatun-dernormalDObuttheeffluentammonianitrogenisabout5mg/L．Thenitritenitrogenaccumulationrateis37%attheendofthereactionwithlowernitrificationrate．Thereisagoodlinerrelationshipbe-tweentheratioofNO－x－NformationratetoNH+4－NoxidationrateandDOconcentration．TheDOcon-centrationhaslittleeffectontheorthophosphateremovalefficiencytheorthophosphateremovalrateismorethan90%andtheeffluentorthophosphateconcentrationislessthan0．5mg/L．Theeffluentisclearandfilamentousbacteriacanbeseen．·99·271520118CHINAWATER＆WASTEWATERVol．27No．15Aug．2011KeywordslowDOconcentrationSBRprocessanoxic/aerobicpollutantremovalper-formanceDO。DODO。DO2mg/L。DO1～3。DO12mg/LDODODO。SBR、4～7。/A/OSBR。11.1pH6．5～8．2、COD300～400mg/L、40～50mg/L、PO3－4－P2～4mg/L。1.2SBR1。1Fig．1Schematicdiagramofexperimentalequipment700mm、200mm、12L、3L、0．25。10cm。。。pH、DO、ORP。25±1℃。A/O5。38h、0．5h、2．5h、2h、。10～15dMLSS2500～3000mg/L。1.3COD5B－3CODNO－3－NNO－2－NN－1－－NH+4－NMLSS、SSPO3－4－PDO、WTWinoLabOxilevel2OLYMPUSBX51/BX52。22.1CODDODOCOD2。ACODA。2、DOCODFig．2VariationofCODconcentrationundernormalandlowDOconditionsDODO1mg/L·001·2715．watergasheat．comDOCODDOCODDO。DO2mg/LCOD2．5hCOD50mg/L85%～88%。DO1mg/L2．5hCOD40mg/LCOD87%～91%。DOCODDOCOD4%～15%。DODO=1mg/LCODCOD。2.2DODO。DO2mg/L2．5h1～2mg/L95%。DO1mg/L2．5h5mg/LCOD90%。DODO15%～30%。DO5mg/L。SBRDO40～50mg/L90%。SBRCOD、HRT、SRT、DO。Hanaki8DODO。2.3DODO3。DO13%DODO37%。3、DOFig．3VariationofnitriteandnitrateconcentrationsundernormalandlowDOconditionsDO。DODO1mg/L、NO－x－NDO4。4DONO－x－N/Fig．4RelationshipofDOconcentrationandratioofNO－x－NformationratetoNH+4－Noxidationrate4ΔNO－x－NΔNH+4－N=0．2004DO+0．33231DONO－x－NNH+4－NDO。DOSBR。2.4DODO·101·．watergasheat．comDOA/OSBR27155。30min。、DO0．5mg/L。5、DOFig．5VariationoforthophosphateundernormalandlowDOconditionsDODODO。1．5～2．5h90%。DO。2.5SSDO。。、。3①DO1mg/L2．5hCOD40mg/LCOD87%～91%。DOCODDO2mg/LCOD4%～15%。②DO1mg/L2．5h5mg/L90%。DODO。③DO1mg/LDO37%。DONO－x－NNH+4－NDO。④、DO0．5mg/LDO。⑤DOSS1～2mg/L。1．SBRJ．200420840－42．2．J．2009251511－14．3．SBRJ．2010616132－138．4RordriguesACBritoAGMeloLF．PosttreatmentofabrewerywastewaterusingasequencingbatchreactorJ．WaterEnvironRes200173145－51．5．SBRJ．2004244576－580．6NiBJRittmannBEYuHQ．EvaluationontheimpactsofpredatorsonbiomasscomponentsandoxygenuptakeinsequencingbatchreactorandcontinuoussystemsJ．WaterRes201044154616－4622．7SarfarazSThomasSTewariUKetal．AnoxictreatmentofphenolicwastewaterinsequencingbatchreactorJ．WaterRes2004384965－971．8HanakiKWantawinCOhgakiS．Nitrificationatlowlev-elsofdissolvedoxygenwithandwithoutorganicloadin[e-mail]2011－02－12·201·2715．watergasheat．com