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121212123121．2000922．2000923．200125A2/O。DO1．0mg/L0．2mg/LDO2．5mg/L1．0mg/LTN34．96±4．91%71．44±13．45%MLSS1800mg/L2100mg/L。DO1．0mg/L。DOSVI150mL/g300mL/g。A2/OX703A1000－4602201111－0009－05509081642006BAJ04A07200915082007－00809XD1404100PilotStudyonShortcutNitrogenRemovalfromMunicipalWastewaterunderLowOxygenConcentrationConditionZHENGXiang12WANGRong-chang12SIShu-peng12YANGDian-hai12LIJian-quan3ZHAOJian-fu121．StateKeyLaboratoryofPollutionControlandResourcesReuseCollegeofEnvironmentalScienceandEngineeringTongjiUniversityShanghai200092China2．KeyLaboratoryofYangtzeAquaticEnvironment＜MinistryofEducation＞TongjiUniversityShanghai200092China3．ShanghaiUrbanConstructionDesignandResearchInstituteShanghai200125ChinaAbstractThefeasibilityofshortcutnitrogenremovalatlowoxygenwasinvestigatedinapilot-scaleA2/Osystemfortreatingmunicipalwastewater．TheexperimentalresultsshowthatwhenDOcon-centrationinanoxictankisdecreasedfrom1．0mg/Lto0．2mg/LandDOconcentrationinaerobictankisdecreasedfrom2．5mg/Lto1．0mg/Ltheremovalrateoftotalnitrogenisincreaseddramaticallyfrom34．96±4．91%to71．44±13．45%andMLSSisincreasedfrom1800mg/Lto2100mg/L．NitriteaccumulationoccurswhenDOinaerobictankiscontrolledatabout1．0mg/L．Thesere-sultsverifythatitisfeasibletoachieveshortcutnitrogenremovalinthecontinuous-flowactivatedsludgeprocessandthenitrogenremovalefficiencycanbeimprovedwhilereducingenergyconsumptionforaera-tion．HoweverthesludgevolumeindexSVIisincreasedfrom150mL/gto300mL/gwhenDOcon-·9·271120116CHINAWATER＆WASTEWATERVol．27No．11Jun．2011centrationisdecreasedindicatingthatsludgesettleabilitybecomesworse．KeywordsshortcutnitrogenremovaldissolvedoxygenA2/Oprocessmunicipalwastewater①25%②40%③50%～100%④50%。C/N。。AOBNOB。、pH、DO、、/、、。DO1。AOB0．2～0．4mg/LNOB1．2～1．5mg/L。AOBNOB。DOSBR。A2/O、DODO。11.1ZYA2/O1。GQZY。60m3/d、2．65、11．52、12．32m31．6m。。、、。1Fig．1Schematicdiagramofpilot-scalereactorsystem1.2ZY。12t99．7%、。MLSS2000mg/L。1.31150%100%。、pH。1Tab．1Parametersindifferentconditionsmg·L－1DODOⅠ1．02．5Ⅱ0．22．0Ⅲ0．21．5Ⅳ0．21．01.4C/N。2。·01·2711．watergasheat．com2Tab．2Characteristicsofinfluentindifferentconditions/℃COD/mg·L－1NH+4－N/mg·L－1TN/mg·L－1TP/mg·L－1Ⅰ21．6±0．9165．21±60．2028．85±3．1729．00±3．792．09±0．22Ⅱ24．3±0．9111．30±45．2321．28±6．7221．46±6．661．59±0．63Ⅲ28．8±0．7155．83±31．7319．62±3．5026．07±4．601．36±0．32Ⅳ29．9±0．3151．84±45．7920．51±5．2029．38±8．791．57±0．1422.1CODⅠCODCOD106．29±30．96mg/L40%。ⅡⅢCOD37．52±7．53mg/L61．70±18．84mg/L60%。ⅣCOD76．00±16．16mg/L53．07±7．47%。ⅠCOD。DO1．0mg/L0．2mg/L、DO2．5mg/L2．0mg/LCODDOCOD50%。2.2NH+4－NⅡⅢ。Ⅱ0．20±0．10mg/L99%Ⅲ0．76±0．44mg/L96%ⅠⅣ2．30±1．93mg/L1．34±1．31mg/L90%。DO1．0～1．5mg/L。2.3TNTN、、2。Ⅰ、Ⅱ、Ⅲ、Ⅳ20．51±1．42、10．00±2．95、9．32±2．78、9．59±5．25mg/LTN34．96±4．91%、54．35±12．98%、64．55±6．90%、71．44±13．45%。2DOTNⅣ90%。2DO2．5mg/L1．0mg/LTN10%TN。2Fig．2NitrogenconversionindifferentconditionsⅠ1．0mg/L16．12±3．38mg/L。DOA2/O。Plosz3DONO－3DO。ⅠDO2．5mg/L·11·．watergasheat．com2711NH+4－NNO－3NO－2N2。Ⅱ、Ⅲ、ⅣNH+4－N。DO。DOTN。Ⅳ40%。4。ⅡⅢⅣTN。A/ODO0．6～1．0mg/L。Ruiz5DO5．7mg/L1．7mg/LDO1．4mg/LDONO－2DO0．7mg/L＞65%。6DO0．5mg/L。7A/ODODO0．3～0．7mg/L。DO1mg/L。DONH+4－NNO－2－NNO－3－N。DOFA。CecengDO/FA＜5NO－3DO/FA＞5。Ⅰ、Ⅱ、Ⅲ、ⅣFA0．07±0．06、0．10±0．05、0．11±0．03、0．11±0．03mg/LDO/FA5DODO/FA5。DO/FA＜5。2.4MLSSSVI。MLSS3。3Fig．3MLSSineachtankindifferentconditions3、、。ⅠⅡⅢ1800mg/LⅠ。Ⅳ2200mg/L。。。TN4。TNTN。ⅠⅡ、Ⅲ、ⅣTNTNTN。·21·2711．watergasheat．com4TNFig．4RemovalloadofTNindifferentconditions8。SVISVI50～150mL/g。9SVI200mL/g1。50～60mL/gSVI。7SVI80～120mL/g。ⅣSVI。SVISVI100mL/gSVI300mL/g。3①A2/O2．5mg/L1．0mg/LTN30%TN90%。②A2/ODO0．2mg/L、DO1．0mg/L40%。③DO1．0mg/LSVI300mL/g。1．J．200616101067－1072．2．J．200671083－87．3PloszBGJobbagyAGradyCPL．Factorsinfluencingdeteriorationofdenitrificationbyoxygenenteringananox-icreactorthroughthesurfaceJ．WaterRes2003374853－863．4．J．2003620－21．5RuizGJeisonDChamyR．NitrificationwithhighnitriteaccumulationforthetreatmentofwastewaterwithhighammoniaconcentrationJ．WaterRes20033761371－1377．6．J．200627122472－2476．7．A/OJ．2006265703－709．8PengDCBernetNDelgencesJPetal．SimultaneousorganiccarbonandnitrogenremovalinanSBRcontrolledatlowdissolvedoxygenconcentrationJ．JChemTechn-olBiotechnol2001766553－558．9．J．2006261135－38．1988－。E－mailwangrongchang@tongji．edu．cn2011－01－20·31·．watergasheat．com2711