CANON工艺中N2O的释放途径及影响因素付昆明

CANONN2O—100044N2ON2O。N2O。CANONN2O。、N2ONH+4－N、NO－2－N、。CANONN2ONO－2－NDONO－2－NN2O。N2OCANONTU992B1000－4602201802－0037－05SQKM20171001600651308025N2OＲeleasePathwaysandInfluencingFactorsinCANONProcessFUKun-mingFUChaoWANGHui-fangQIUFu-guoSino－DutchＲ＆DCentreforFutureWastewaterTreatmentTechnologiesKeyLaboratoryofUrbanStormwaterSystemandWaterEnvironment＜MinistryofEducation＞BeijingUniversityofCivilEngineeringandArchitectureBeijing100044ChinaAbstractAsakindofpowerfulgreenhousegasmostofN2Ocouldbereleasedfromnitrogenre-movalfromwastewater．WastewaterbiologicalnitrogenremovalprocessnotonlyincreasesthepotentialforN2OemissionbutalsotransfersN2Ofromwastewatertoatmosphere．AsanewdenitrificationprocessCANONprocesshasitsuniquetechnicaladvantagesinthetreatmentofammonia-richwastewater．Soithasbeenwidelyusedinpracticalwastewatertreatmentfield．WhileCANONprocesscouldnotbetakenasaperfecttechnologyforwastewatertreatmentduetoalotofN2Oemissions．Fromthemicrobialbio-chemicaltransformationmechanisminCANONprocesstheN2Oreleasepathwayswereinvestigatedafteranalysisoftheshortcutnitrificationdenitrificationandanaerobicammoniumoxidationstage．AndthenthekeyfactorssuchasNH+4－NNO－2－Naerationflowwerediscussed．Aftercomprehensivelyana-lyzedthemechanismandinfluencingfactorsofN2OemissionfromCANONtheoptimaloperatingcondi-tionsofCANONwereputforwardtoavoidNO－2－NaccumulationandlowlevelofDO．AndfurthermorethefunctionalmicroorganismpopulationwascultivatedtoadapttohighNO－2－Nconcentrationandtore-duceN2O．·73·34220181CHINAWATEＲ＆WASTEWATEＲVol．34No．2Jan．2018KeywordsN2OCANONpartialnitritationANAMMOXnitriteN2OGWP1CO2300CH412CO2CH4。N2ON2O9．5×108kg/a29%。N2ON2O0．3～3×1012kg/aN2O2．5%～25%。N2O。CANONANAMMOXNO－2－NNH+4－NN2。ANAMMOXNO－2－NN2O。CANONN2O。1CANONN2ON2O、NH2OH2。CANONANAMMOX3。N2ON2O。1.1N2ONH2OHNON2ONH2OHAOBNO－2－NN2OAOB。CANONNOBAOBNH+4－NNH2OHNO－2－NN2O。N2O4N2O。Kim5NO－2－NNH+4－NN2O。N2ONH2OH、NOH、AOB。1.1.1NH2OHNH+4－NpHNH+4－NNH2OHNH2OHHAON2O。Kim5NH2OHN2ONH+4－NN2ONH2OHN2O。N2ONH2OHN2O6。NH2OHN2OpH＜5．50pH7～82N2O。NH2OHN2ONH2OHHAON2O。1.1.2NOHNH2OHNOHNOHN2O2H2N2O。7AOBN2ONOHN2O。1.1.3AOBNO－2－NAOBNOＲisoNIＲNO－2－NN2OAOB。NO－2－NAOBN2O。Jia8N2O·83·342．watergasheat．comAOBN2OAOBN2O。DOAOBN2ONH2OH。9NH+4－NNH+4－NNH+4－NNO－2－NAOBN2ON2O。AOBN2O。Casciotti10AOBNOSN2O。NO－2－NAOBN2O。1.1.4SＲT。COD/N、DO100～10005。N2OAnderson11N2O。1.2ANAMMOXANAMMOXN2ONH2OH、NO－2－N、NO。Okabe4ANAMMOXNO－2N2ON2O0．1±0．07%、0．14±0．09%4．0±1．5%、9．6±3．2%CAN-ONN2O。ANAMMOXN2ONONOANAMMOX12。13ANAMMOXHAONH2OHNON2ONH2OHN2O。4N2ON2OAN-AMMOXAOBAOBN2OAOBN2OANAMMOXN2OANAMMOXN2O。DO、FNAANAMMOXNO－2－NN2O。ANAMMOXN2ON2O14。CANONC/N、N2O15。1.3CANON。N2ONOSN2。N2O①NOSNO－3－NN2O②NOSN2ONOSDO、、C2H2NOSN2O。NO－3－NCANONDＲNANO－3－NNO－2－NNH+4－N、。2N2OCANONN2ONH+4－N、NO－2－N、DO、pH、、、NaClO3N2O。2.1NH+4－NCANONNH+4－NNH2OH、NO－2－NN2O。16SBBＲNH+4－NN2O。Pijuan17DONH+4－NN2O·93·．watergasheat．comCANONN2O342NH+4－NNH+4－NN2O。2.2NO－2－NCANONNH+4－N、DO、NO－2－NNH+4－NNO－2－NDO、ANAM-MOX、NOBNO－2－N。NO－2－NNOSN2O。NO－2－NAOBN2O18。NO－2－NFNANOSN2O。Law19NO－2－NN2ONO－2－N50～500mg/LN2ONO－2－NN2O。NO－2－NN2O17AOBNO－2－N。NO－2－N。2.3pHpHN2OFNA。pHNO－2－NFNAFNA＞0．004mg/LN2O。Dai20pH8．56．5N2O。Anderson11N2OpHpH=8．5N2OpH=6N2O。pHN2O。2.4/DOCANONDON2ON2ON2O。DOANAMMOXNO－2－NN2OO2N2O。N2O。Castro21PN/AN2ONH+4－N2．5±0．8%1．0±0．3%。PN/AN2O17DOAOBNO－2－NN2O。2.5C/NCANONCANONNO－2－N、NON2O。NH+4－NDONO－2－NN2OC/N0．5N2OC/NN2O。N2OC/NN2O。3①CANONN2ONH2OHAOB。②NH+4－N、NO－2－N、DO、pHN2ONOSN2OANAMMOXNO－2－N。③CANONN2ONO－2－NDONO－2－NN2O。1．J．20139149－54．2KampschreurMJTemminkHKleerebezemＲetal．·04·342．watergasheat．comNitrousoxideemissionduringwastewatertreatmentJ．WaterＲes200943174093－4103．3．CANONJ．201339915－19．4OkabeSOshikiMTakahashiYetal．N2Oemissionfromapartialnitrification-anammoxprocessandidentifi-cationofakeybiologicalprocessofN2OemissionfromanammoxgranulesJ．WaterＲes201145196461－6470．5KimSWMiyaharaMFushinobuSetal．Nitrousoxideemissionfromnitrifyingactivatedsludgedependentondenitrificationbyammonia-oxidizingbacteriaJ．Biore-sourTechnol2010101113958－3963．6WunderlinPMohnJJossAetal．MechanismsofN2Oproductioninbiologicalwastewatertreatmentundernitri-fyinganddenitrifyingconditionsJ．WaterＲes20124641027－1037．7LawYNiBLantPetal．N2Oproductionrateofanenrichedammonia-oxidisingbacteriacultureexponential-lycorrelatestoitsammoniaoxidationrateJ．WaterＲes201246103409－3419．8JiaWLiangSZhangJetal．Nitrousoxideemissioninlow-oxygensimultaneousnitrificationanddenitrificationprocesssourcesandmechanismsJ．BioresourTechn-ol2013136444－451．9．N2OJ．201671－5．10CasciottiKLSigmanDMWardBB．Linkingdiversityandstableisotopefractionationinammonia-oxidizingbacteriaJ．Geomicrobiology2003234335－353．11AndersonICPothMHomsteadJetal．AComparisonofNOandN2OproductionbytheautotrophicnitrifierNitrosomonaseuropaeaandtheheterotrophicnitrifierAl-caligenesfaecalisJ．ApplEnvironMicrobiol199359113525－3533．12．N2OJ．20103635－9．13．J．2009355473－481．14YuＲKampschreurMJVanLoosdrechtMCMetal．Mechanismsandspecificdirectionalityofautotrophicni-trousoxideandnitricoxidegenerationduringtransientanoxiaJ．EnvironSciTechnol20104441313－1319．15TangCZhengPWangCetal．Performanceofhigh-loadedANAMMOXUASBreactorscontaininggranularsludgeJ．WaterＲes2011451