低基质CANON中短程硝化稳定性控制研究林兴

31820188ＲesearchofEnviro[e-mail]．*1958-、[e-mail]．2016YFC0401103SupportedbyNationalＲesearchandDevelopmentProgramChinaNo．2016YFC0401103．CANONJ．20183181423-1430．LINXingFANGWenyeJINＲunetal．StudyonstableoperationalstrategyofparitialnitritationinCANONwithlowstrengthwastewaterJ．ＲesearchofEnvironmentalSciences20183181423-1430．CANON123123123123123123*1．2150092．2150093．215009PNACANON〔ρNH4+-N50mgL〕FAfreeammonia、DOCANON．NLＲnitrogenvolumeloadingCANONNLＲ1.01kgm3·d32dΔNO3－-NΔNH4+-NNO3－-NNH4+-N0.11±0.02．ρNO3－-NΔNO3－-NΔNH4+-N0.49．ρFA2mgLNOBρFAρNO3－-NFA．ρDO＜0.3mgLΔNO3－-NΔNH4+-N0.16NOBρNO3－-N．VAOB＞VAnAOB＞VNOB〔ρDO＜0.3mgL〕NOB．FANOBNOB、．CANONFADOX7031001-6929201808-1423-08ADOI10.13198j.issn.1001-6929.2018.05.21StableOperationalStrategyofParitialNitritationinCANONwithLowStrengthWastewaterLINXing123FANGWenye123JINＲun123GUOChaoran123LIXiang123HUANGYong123*1．SchoolofEnvironmentalScienceandEngineeringSuzhouUniversityofScienceandTechnologySuzhou215009China2．NationalandLocalJointEngineeringLaboratoryofMunicipalSewageＲesourceUtilizationTechnologySuzhouUniversityofScienceandTechnologySuzhou215009China3．InstituteofEnvironmentalBiotechnologySuzhouUniversityofScienceandTechnologySuzhou215009ChinaAbstractInordertoinvestigatethestableoperationalstrategyofpartialnitrificationinPNANAMMOXprocessacontinuousflowreactorwasusedtotreatthelowstrength50mgLwastewater．TheeffectsofcontrolparameterssuchasfreeammoniaFAanddissolvedoxygenDOonpartialnitrificationinacontinuousflowCANONreactorunderlowammonianitrogenwereinvestigated．TheresultsshowthatincreasingnitrogenvolumeloadingNLＲintheearlystageofstart-upisbeneficialtomaintainingthestableoperationofCANONreactorrunningat32dwithNLＲandΔNO3－-NΔNH4+-Nmaintainedat1.01kgm3·dand0.11±0.02respectively．HoweverwithaprolongedofoperationperiodtheconcentrationofNO3－-Nwasgraduallyincreasedfromitstheoreticalvalueto0.49whichsubjectedpartialnitrificationtoseriousdamaged．SubsequentlyFAandDOwerecontrolledtoinhibitNOB．TheinhibitioninNOBwasobservedwhenρFAwasasupto2mgLthoughtheinhibitionperiodwasrelativelyshort．WiththedecreaseofρFAρNO3－-Nincreasedrapidly．AlsobylimitingoxygensupplyandmaintainingρDO＜0.3mgLΔNO3－-NΔNH4+-Ndecreasedto0.16．However31NOBwasnotcompletelyinhibitedandρNO3－-Nwasstillrising．TheresultsofmicrobialactivitydeterminationshowedthattheactivityoffunctionalbacteriawasenhancedwiththeresultsVAOB＞VAnAOB＞VNOB．UndertheconditionofoxygenlimitedρDO＜0.3mgLtheactivityofNOBwasmaintainedatahighlevel．ThestudyshowedthatNOBwashardlyinhabitedbyusingFAandoxygenlimitedconditionunderlowconcentrationofammonianitrogen．TheselectionofNOBcontrolconditionsshouldbefurtherstudiedincombinationwiththemicrobialpopulationstructureandthegrowthcharacteristicinthereactor．KeywordsCANONpartialnitrificationFADOmicrobialactivity、60%1．．AOBNH4+-NNO2－-NNOBNO2－-N．FAfreeammonia、FNAfreenitrousacidNOB2-3．ρNH4+-N30～100mgLFAFNA．PNANOBρNO3－-N、TN4-5．Gonzalez6ρNH4+-N100mgLCANON140dρNO3－-N40mgL．LI7SBＲ〔ρNH4+-N100mgL〕ΔNO3－-NΔNH4+-NNO3－-NNH4+-N0.410.98NOB．CANONNOB．CANONSBＲ8-10SBＲCSTＲCANON．Svehla11CSTＲSBＲNOB．．CANONCANONFA、DO．PNA．11.19.25L．1．23～30℃．1Fig.1Schematicdiagramoftester1.2NH4HCO3NaHCO3NH4+-NpH8±0.3．12NAＲ90%．25%．1.313．ρNH4+-NρNO2－-NN-1--ρNO3－-NMLSS、MLVSS、ρDOWTWpHpH211．NiPＲNO2－-NNaPＲNO3－-N14．1.4．ρNH4+-N42418CANON50mgLHＲTNLＲnitrogenvolumeloading．31、66、105d500mL、、AnAOB、AOB、NOB．pH7.525℃1．AnAOB15minρDOAOB、NOBρDO2mgL．540minρNH4+-N、ρNO2－-N、ρNO3－-N15．1Table1ThesyntheticwastewaterinbathexperimentmgLρNH4+-NρNO2－-N304070——702Fig.2Variationsofnitrogenconcentrationinthereactor22.1CANONρNH4+-N50mgLHＲTNLＲ2．221dHＲT4.19h1.61hNLＲ0.28kgm3·d0.77kgm3·d．NLＲTN．．13dNＲＲ0.12kgm3·dρNO3－-N3.23mgLΔNO3－-NΔNH4+-N0.1016-17．2NＲＲ0.20kgm3·dΔNO3－-NΔNH4+-N0.11CANON．NLＲNiPＲ21dNiPＲ0.27kgm3·dAOB．NaPＲ0NOBLIU18．NLＲ1.01kgm3·dρNO3－-N．45dρNO3－-N9.1mgL524131ΔNO3－-NΔNH4+-N0.21NaPＲNOB．19NOBNLＲNLＲ0.6kgm3·dNOB．NLＲ1.01kgm3·dNOBρNH4+-NNLＲNOB20．3ρFAFig.3VariationsofFAinthereactor2.2FA21FANOB．FAAOBNOBNOBFA22-23．Anthonisen23ρFA0.1～1.0mgLNOB．Vadivelu24ρFA0.6mgLNOB．ρFA3．330dρNH4+-NρFA1.5mgLNOB．ρNH4+-NρFA1.2mgLρNO3－-NFANOB．25NOBFAFA．26NOB7mgLFAρFA16mgL7mgLFANOB．ρNO3－-NNOBFA．44ρNH4+-NpHρFA2mgL．pHFANOBHawkins27ρFA2.1～2.2mgLpH7.18.0NOB18%60%．FAρNO3－-N9.2mgL5.1mgLNOB．ρNO3－-N14.84mgLNOBFA．FANOB．2.3DOAOB、NOBDONOB28．29AOBNOB0.62.2mgL．AOBAnAOBρDO0.7mgL．NOBρNO3－-N14.84mgL．DOρDO0.5mgLρNO3－-N82d7.12mgL10.61mgLΔNO3－-NΔNH4+-N0.170.25NOB．NLＲ30NLＲρNH4+-N．86dHＲT1.6hNLＲ0.77kgm3·dρDO0.3mgL．ρNH4+-NNH4+-N70%．NOBρNO3－-NΔNO3－-NΔNH4+-N0.16．NaPＲ40.1kgm3·d．ρDO0.3mgLρNO3－-N．MIAO31CANON〔ρNH4+-N60mgL〕ρDO0.17±0.08mgL．60dρNO3－-N4.71mgL38.14mgLNOB．NOBNOB．2.4CANONCANON．60d24℃30℃32NＲＲ0.30kgm3·d．NＲＲ23℃0.2kgm3·d33．Arrhenius〔1〕NＲＲNＲＲlnNＲＲ62418CANON4DOFig.4VariationsofnitrogenconcentrationinthereactorwiththecontrolofDO1T．lnNＲＲ=lnA－EＲT1NＲＲkgm3·dAArrheniusEkJmolＲ8.314JK·molTK．5NＲＲFig.5ＲelationshipbetweenNＲＲandtemperature523～30℃2E．26～30℃E82.04kJmol63～70kJmol23～26℃149.11kJmol26～30℃1.82．E34E．Lotti3530℃0.21d－