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100124DOAOBKO2AOB。DO0．5±0．1mg/LAOBKO2AOB0．281±0．026mgO2/LDO2．5±0．5mg/LAOBKO2AOB0．064±0．008mgO2/LAOBDO。KO2AOBDODODO。TU992．3A1000－4602201723－0022－05OxygenHalf-saturationConstantsofAmmoniaOxidizingBacteriaAOBinNitrificationSludgeunderDifferentDissolvedOxygenYANGQingYANGYu-bingLIUXiu-hongHUANGSi-tingZHOUXue-yangLIJian-minNationalEngineeringLaboratoryforAdvancedMunicipalWastewaterTreatmentandＲeuseTechnologyBeijingUniversityofTechnologyBeijing100124ChinaAbstractInordertostudytheeffectofdissolvedoxygenDOconcentrationonpartialnitrifica-tiontheoxygenhalf-saturationconstantsofAOBinnitrificationsludgewerestudiedinasmall-scalere-actorunderlong-termdissolvedoxygenconditions．TheresultsshowedthatKO2AOBofnitrificationsludgewas0．281±0．026mgO2/Lunderlong-termlowDOof0．5±0．1mg/L．WhilethevalueofAOBwas0．064±0．008mgO2/Lunderlong-termhighDOof2．5±0．5mg/LindicatingthattheAOBhadahighaffinityforoxygenanditcouldmaintainarelativelyhighammoniaoxidationrateinthehighDOenvironment．TheKO2AOBvaluesofthetwosystemswerelowindicatingthatbothlowandhighDOconditionswerelikelytoachievepartialnitrificationanditwaseasiertoachievepartialnitrificationunderhighDOconditions．Keywordspartialdenitrificationnitrificationsludgeammonia-oxidizingbacteriaAOBoxygenhalf-saturationconstantdissolvedoxygen5150856117———E－maillxhfei@163．com·22·3323201712CHINAWATEＲ＆WASTEWATEＲVol．33No．23Dec．2017、。、25%40%、。AOBNOB。DOHanakiDOAOBNOBAOBNOBDO。Peng1DOLiu20．5mg/L。Park3DO0．12mg/L。Ｒegmi4AOBKO2AOB1．16mg/LKO2NOB0．16mg/LＲuiz5NH+4－NDO5．5mg/L175d。DODO。AOBAOBAOB。11.11LMulti340ipHDO。1。SBＲSBＲDO0．5mg/LDO2．5mg/L325℃。SBＲ。30minCOD。25mg/L1mol/LNaHCO3pH7．8。DO0．2、0．4、0．6、1．2、2．0mg/LDO0．2、0．6、1．2、1．8、2．4mg/L。1Fig．1BatchtestreactiondeviceDODODO。OriginMonodAOB。1.21。1Tab．1WastewatercharacteristicCOD/mg·L－140～6050NH+4－N/mg·L－120～2522．5NO－3－N/mg·L－10～1．120．56NO－2－N/mg·L－10～1．020．51COD/TIN2～2．42．2MLSS/mg·L－12500～35003000pH7．7～7．97．8CODMLSSNO－2－NN－1－－NO－3－NNH+4－NpHDOMulti340iWTW。22.1DO2。DO0．2mg/LpHSCODpH·32·．watergasheat．com3323。NH+4－N360min4．5mg/LNO－x－N17．8mg/L。DO2．4mg/LpHSCODpH。NH+4－N120min2．4mg/LNO－x－N18．24mg/L。2DODO、pHFig．2VariationofNH+4－NDOpHinonecycleunderdifferentDOconcentrationNH+4－NNO－x－NDO。2.2、DOAOBDOAOBMonodvmax=193．925mgN/L·dAOBKO2AOB=0．281±0．026mgO2/L95%。DOvmax267．549mgN/L·dKO2AOB0．064±0．008mgO2/L95%。DODO。2.3AOBASMMonodASMMonodAOBAOB2。2KO2AOBTab．2SummaryofdifferentKO2AOBconstantsinliteratureKO2AOB/mgO2·L－10．326SBＲDOT25℃0．0337SBＲDO0．4mg/LT22℃pH8．044μm0．48SBＲDO＜0．6mg/LT25℃pH7．1～7．30．19SBＲDO0．5mg/L0．810ASM30．1711DO3mg/LT20℃pH7～7．4120μm0．7911DO2．5～3mg/LT20℃730μm0．512SBＲDO3．5mg/L0．9413SHAＲONDO3mg/LpH6．5～8T35℃0．2514DO3mg/LT35℃Sin9、、、。、、。。Monod。2.3.1DOKO2AOBDOKO2AOB0．281mgO2/L0．2～0．4mgO2/L。Hanaki6SBＲ·42·3323．watergasheat．com。Blackburne70．4mg/LKO2AOB0．033mgO2/LDOKO2AOBNOBAOBKO2AOB。Beccari15DO＜40μmBlackburneKO2AOB44μm。Wett8SBＲKO2AOB0．4mgO2/LWettBlackburneAOB。Sin9ASM2dSBＲKO2AOB0．1mgO2/L。2.3.2DOKO2AOBDOKO2AOB0．064mgO2/LDOAOBDOAOB。Bao16AOB/NOBAOBAOBDONOB。Jones14SBＲKO2AOB0．25mgO2/LKaelin10ASM3SBＲKO2AOB0．8mgO2/LKa-mpschreur12SBＲKO2AOB0．5mgO2/LWettSBＲKO2AOB。Volcke13SHAＲ-ONKO2AOB0．94mgO2/LManser11MBＲCAS0．17±0．040．79±0．08mgO2/LCASKO2AOBMBＲMBＲKO2AOB。2.3.3、DOAOB、DODO3。DODO0．2～2．0mg/L、25mg/LDODO0．2mg/L。Hanaki6DOAOBDO。DODO0．2mg/L0．6mg/L31．7mgN/gVSS·h45．5mgN/gVSS·hDO0．6～2．4mg/LDODO。3、DODOFig．3AmmoniaoxidationrateunderdifferentDOconcentrationintwosystemsDODODODOAOBAOB。DO·52·．watergasheat．com3323AOBDO。3①SBＲAOB0．281±0．026mgO2/L。②SBＲAOB0．064±0．008mgO2/LDOAOBDO。③Monod。1PengYZhuG．Biologicalnitrogenremovalwithnitrifi-cationanddenitrificationvianitritepathwayJ．Micro-biolBiotechnol200673115－26．2LiuGWangJ．Long-termlowDOenrichesandshiftsnitrifiercommunityinactivatedsludgeJ．EnvironSciTechnol2013475510－511．3ParkHNoguraD．Evaluatingtheeffectofdissolvedox-ygenonammonia-oxidizingbacterialcommunitiesinacti-vatedsludgeJ．WaterＲes200438143275－3286．4ＲegmiPMillermM．ControlofaerationaerobicSＲTandCODinputformainstreamnitritation/denitritationJ．WaterＲes2014575162－171．5ＲuizGJeisonDChamyＲ．Nitrificationwithhighni-triteaccumulationforthetreatmentofwastewaterwithhighammoniaconcentrationJ．WaterＲes20033761371－1377．6HanakiKWantawinCOhgakiS．NitrificationatlowlevelsofdissolvedoxygenwithandwithoutorganicprocessinasuspendedgrowthreactorJ．WaterＲes1990244297－302．7BlackburneＲYuanZKellerJ．PartialnitrificationtonitriteusinglowdissolvedoxygenconcentrationasthemainselectionfactorJ．Biodegradation2008192303－312．8WettBOmariAPodmirsegSetal．Goingformain-streamdeammonificationfrombenchtofullscaleformaximizedresourceefficiencyJ．WaterSciTechnol2013682283－289．9SinGKaelinDKampschreurMJetal．Modellingni-triteinwastewatertreatmentsystemsadiscssionofdif-ferentmodellingconceptsJ．WaterSciTechnol20085861155－1171．10KaelinDManserＲＲiegerLetal．ExtensionofASM3fortwo-stepnitrificationanddenitrificationanditscali-brationandvalidationwithbatchtestsandpilotscaleda-taJ．WaterＲes20094361680－1692．11ManserＲGujeraWSiegristH．ConsequencesofmasstransfereffectsonthekineticsofnitrifiersJ．WaterＲes20053924633－4642．12KampschreurMJCristianPNicoTetal．Unravelingthesourceofnitricoxideemissio