不同碳源对颗粒污泥反硝化过程中N2O产生量的影响

27420117FORESTENGINEERINGVol.27No.4July2011N2O112*1.1500402.150090N2O。、、N2ON2O0.42mg/LN2O0.082mg/L。N2O1.21mg/LN2ON2O0.87mg/LN2O0.077mg/L。N2ON2O。N2O。N2OX52A1001－005X201104－0007－03EffectofDifferentCarbonSourcesonAmountofN2OEmissionfromDenitrificationProcessofGranularSludge/ZengWeiCollegeofForestryNortheastForestryUniversityHarbin150040GaoDawen1.CollegeofForestryNortheastForestryUniversityHarbin1500402.SchoolofMunicipalandEnvironmentalEngineeringHarbinInstituteofTechnologyHarbin150090AbstractBasedonstableoperationofaerobicgranularsludgesystemtheeffectofdifferentcarbonsourcesontheprocessofaerobicgranularsludgedenitrificationandtheamountofN2Oemissionwasstudied．Whenmethanolwastakenasthecarbonsourcewiththedecreaseofhypoxiaammo-nianitriteandnitrateconcentrationstheconcentrationofN2Owasalsodecreasedinthewholeprocess．DuringdenitrificationprocessthehighestconcentrationofN2Owas0.42mg/L．UnderhypoxicconditionsthehighestconcentrationofdissolvedN2Oproducedbymethanolasexternalcarbonsourcewasupto0.082mg/L．AddingethanolasthecarbonsourcetheconcentrationofN2Oinitsgasreleasewas1.21mg/Lwhentheaerobicend．N2OdecreasedinthewholeoxygenconcentrationprocessandthehighestvalueoftheproducedN2Owas0.87mg/LwithhighestdissolvedN2Oof0.077mg/L．ResultsshowthatwithadequatemethanolandethanoladdedintothedenitrificationprocessofaerobicgranularsludgethegenerationofN2Ocanbedetectedbuttheamountisquitesmallthatcanbeignored．Thereforeaddingdifferentcarbonsourcesintodenitrificationprocessofaer-obicgranularsludgehaslittleeffectonN2Ogeneration．KeywordsN2Oproductiondifferentcarbonsourcesgranularsludgenitrificationanddenitrification2011－01－18200544JC2009091984－。。*1967－。。N2O。N2OCO2、CH4CH45～12CO2200～300114a1。N2OCO22502。N2O619.36ug/L0.25%～0.31%N2O0.3℃3。N2O。NONO2O34。N2O、。N2ON2ON2ON2O。N2ON2O。2711.1SBR。NH4Cl、KH2PO4、COD。NH+4－N30±2mg/LPO3－4－P0.04mg/LCOD300mg/L。NaHCO3pH7～8。1mL/L。MLSS3030mg/mLSVI33mL/g。1.2SBR13.2L。0.1m3/h。。1Fig.1Schematicdiagramofexperimentalsystem1.3SBR77。31±0.5℃240min40min0.1m3/hDO3.5mg/L。、。10d20N2O。1.41.4.1NH+4－N、NO－2－N、NO－3－N、CODMLSS5。Multi340ipH、DOpHDO。1.4.2N2ON2O2010PorapakQ30m×0.53mm×20μm。150℃70℃ECD300℃N2O。50mL20mL30mL1mLH2SO41mol/L1h367。2、N2O。2N2O。2N2O0.97mg/L、、N2O。N2O0.42mg/L84N2ON2ON2ON2ON2O。N2O21mg/LN2O50。2Fig.2ThenitrogenconcentrationofmethanolcarbonsourcesduringdenitrificationstageN2O3。N2O1.21mg/LN2O、、。N2O0.87mg/L。3Fig.3ThenitrogenconcentrationofethanolcarbonsourcesduringdenitrificationstageN2O4N2O0.082mg/LN2O0.077mg/L。N2O。4N2OFig.4DissolvedN2Oasmethanolandethanoladdedascarbonsources3N2O。N2O。N2ON2O。【】1IPCC．ClimateChangetheScientificBasis．CambridgeUniversityPress2001．2．N2OJ．199927374－80．3PhilipKBJamesWA．Nitrousoxideemissionandtheanthropoge-micnitrogeninwastewaterandsolidwasteJ．JournalofEnviron-mentalEngineering20021282137－150．4BalmelleB．Studyoffactorscontrollingnitritebuild－upinbiologi-calprocessesforwaternitrificationJ．WatSciTech1992261018－1025．5．J．20001611－17．6．J．200016229－31．7．J．200384444－447．8．J．201026116－19．9