pH对厌氧限氧SBR同步脱氮除磷效果及N2O释放的影响吕永涛

50220182JOUＲNALOFHAＲBININSTITUTEOFTECHNOLOGYVol.50No.2Feb．2018DOI10．11918/j．issn．0367-6234．201612066pH－SBＲN2O710055pH－SBＲN2O、、COD－DO0．3～0．8mg/LSBＲSNDPＲ．、76．1±5%、98．4±1%．pH6．0、7．0、8．0、9．0N2O．pH9．087．7%pH6．084．0%pHpH6．0MLSS3．7mg/L·h·g83．9%N2OpHpH6．09．03．5．pH6．0N2O．SBＲ－N2OpHX703．1A0367－6234201802－0054－05EffectofpHonnutrientsremovalandnitrousoxideemissionsfromananaerobic/oxygen-limitedSBＲperformingsimultaneousnitrificationdenitrificationandphosphorusremovalLYongtaoZENGYulianYANJianpingSUNTingLIUTingWANGLeiSchoolofEnvironmentalandMunicipalEngineeringXi’anUniversityofArchitectureandTechnologyXi’an710055ChinaAbstractToresearchtheeffectofpHonnutrientsremovalandnitrousoxideemissionsfromananaerobic/oxygen-limitedSBＲperformingsimultaneousnitrificationdenitrificationandphosphorusremovalSNDPＲtheSNDPＲprocesswassuccessfullydevelopedinananaerobic/oxygen-limitedDOconcentrationof0．3－0．8mg/Llab-scalesequencingbatchreactorfedwithsyntheticwastewatermainlycontainingacetateammoniaandphosphorusbyinoculatingwithnitritationsludge．Thereactorremoved76．1±5%and98．4±1%oftheinfluentnitrogenandphosphorusrespectively．TheeffectofinitialpHontheperformanceofSNDPＲandnitrousoxideemissionswasinvestigatedbybatchexperiments．TheresultsshowedthatphosphoruswaswellremovedatpH9．0and6．0andtheremovalefficiencieswere87．7%and84．0%respectively．TheammoniaoxidizingrateincreasedwiththedecreaseofpHfrom9．0to6．0andthemaximumammoniaoxidizingrateof3．7mg/L·h·gandnitrogenremovalefficiencyof83．9%weregainedatpH6．0．TheemissionofnitrousoxidedecreasedwiththeincreaseofpH．SpecificallythenitrousoxideemissionatpH6．0was3．5timesofthatatpH9．0．ThisstudyrevealedthatthenitrogenandphosphoruscouldbebetterremovedatpH6．0andmeanwhileitcouldinducemorenitrousoxideemissions．KeywordsSBＲanaerobic/oxygen-limitedsimultaneousnitrogenandphosphorusremovalnitrousoxidepH2016－12－13511083672015－K611980—1971—[e-mail]!/1．2－3、4/．//、．DO、pH、、CN5－8pH、pH．N2N2O9pHN2O．SBＲ·45·50．C、N、PpHN2O－SBＲN2O．11．134∶155L．280mL/minDO0．3～0．8mg/L．．18～22℃．SBＲ38h2min、180min、210min、50min、10min、28min．46h2min、70min、210min、50min、10min、18min．0．5HＲT12h．SBＲ．1．2MLSS2000mg/L．200mLSＲT25d．MLSS5000mg/L．CODCH3COONa200～400mg/L、NH4+－N40～100mg/L、PO43－－P10～26mg/L、MgSO4·7H2O100mg/L、CaCl260mg/L、60mg/L．100．3mL/L．COD400mg/L、NH4+－N40mg/L、PO43－－P26mg/LpH7．5．1．3pH6．0、7．0、8．0、9．0．6cm、50cm1．0L．0．6LNH4+－N、NO2－－N、NO3－－NPO43－－P1mg/L1L1mol/LpH6．0、7．0、8．0、9．0．500mL/min15mL/minDO＜1．0mg/L．500mL/min．MLSS3400mg/L．20℃．1．4NH4+－N、NO2－－N、NO3－－N、PO43－－P、MLSS、COD11NH4+－NNO2－－NN－1－－NO3－－NPO43－－PMLSSCODpHPHM210HACHUSDOHQ25dHACHUS．0．45μm．1．5N2O5mLPE600N2O．3．N2O、12．22．1SBＲ1－SBＲ、．1～6COD100mg/LNH4+－N18．3～49．5mg/LNO3－－N10．8mg/L15．6mg/L6．6mg/LNO2－－N26．7mg/L44．9mg/L13．5mg/L11．5%7．0mg/L．．7～15COD150mg/LNH4+－N24．2mg/LNO2－－N15．7mg/L0．1mg/LNO3－－N3．2mg/L8．3mg/L9．7mg/L0．3mg/L．、76．5%、96．8%SBＲ．16～37·55·2pH－SBＲN2OCOD20010mg/LNH4+－N19．9mg/LNH4+－N0．5mg/LNO2－－N3．4mg/L0．8mg/LNO3－－N0．9mg/L0．2mg/L87．7%97．1%．37NO2－－N4mg/LNO3－－N1mg/L1mg/L76．1%、98．4%．1SBＲ、Fig．1ConcentrationprofilesofnitrogenandphosphorusinSBＲduringthestart-upandrunningperiodofSNDPＲsystem2．2SBＲ55SBＲ、2．COD20min198．4mg/L33．6mg/LCODCOD89．1%．20min12．9mg/L94．9mg/L．95．4mg/L0．5mg/L99．5%．NH4+－N21．5mg/L0mg/LNOx－－N90min70～150min90min0．1mg/L4．6mg/LTN78．6%．16．9mg/LCOD48．329．1mg/L29．1mg/LCOD21．5mg/LCOD．NOx－－NDO．2SBＲCOD、Fig．2ConcentrationprofilesofCODnitrogenandphosphorusduringatypicalcycleinparentreactor2．3pH、3pH．pH6．0、7．0、8．0、9．030min．pH6．0、7．0、8．0pH9．0．pH6．09．0MLSS27．8、25．6、28．3、29．9mg/L·gMLSS54．1、44．6、48．0、57．9mg/L·h·g．1hpH6．0、7．0、8．0、9．016．4、12．9、12．1、14．9mg/L·h·gMLSS25．9、21．5、25．0、29．1mg/L·g6．6、4．7、5．6、8．3mg/L·h·g．PAOsVFAATPH+13．pH14pH9．08．0·65·50．pH6．0pH7．0pH15．pH6．0、7．0、8．0、9．084．0%、74．7%、79．6%、87．7%pH9．0．3pHFig．3ConcentrationprofilesofphosphorusunderdifferentinfluentpHconditions2．4pH4pHNH4+－N、NO2－－N、NO3－－N．4pHFig．4ConcentrationprofilesofnitrogenunderdifferentinfluentpHconditions4pH6．0、7．0、8．0、9．0150min70～220minMLSS3．7、3．5、2．8、2．1mg/L·h·g．30minNOx－－NNO2－－N0．03mg/L·gNO3－－NpH8．0NO3－－N2．1mg/L·g．83．9%、77．5%、64．9%、67．8%．pHpH6．0SNDPＲ．2．5pH5pH6．0、7．0、8．0、9．0．N2OpH10．8、10．1、6．9、3．5μg/min·g．pH6．0、7．0、8．0、9．0N2O3．5、3．1、2．1、0．1mg21．4%、19．7%、14．8%、5．3%pHN2O．5pHN2O－NFig．5ProfilesofN2O－NemissionrateunderdifferentinfluentpHinaerobicstageN2OMeyer9N2O．N2ONO2－－N4、5pHNO2－－NN2ONO2－－NN2O．HNO2N2ONosN2ON2O10．NO2－－NpHHNO2NosN2OpH．·75·2pH－SBＲN2O31、、－DO0．3～0．8mg/LSBＲ、76．1±5%、98．4±1%．2pH6．09．084．0%、74．7%、79．6%、87．7%pH9．0pH6．0．3pH6．09．083．9%、77．5%、64．9%、67．8%pH6．0．4pHN2OpH6．0pH9．03．5．1OEHMENALEMOSPCCAＲVALHOGetal．AdvancesinenhancedbiologicalphosphorusremovalFrommicrotomacroscaleJ．WaterＲesearch200741112271－2300．2GOGINAEGULSHINI．SimultaneousnitrificationanddenitrificationwithlowdissolvedoxygenlevelandC/NratioJ．ProcediaEngineering2016153189－194．3JIAWenlinLIANGShuangNGOHHetal．EffectofphosphorusloadonnutrientsremovalandN2Oemissionduringlow-oxygensimultaneousnitrificationanddenitri-ficationprocessJ．BioresourceTechnology20131414123－130．4KAPAGIANNIDISAGZAFIＲIADISIAIVASIDISA．Comparisonbetweenaerobicandanoxicmetabolismofdenitrifying-EBPＲsludgeEffectofbiomasspoly-hydro