短程硝化反硝化生物滤池脱氮机制研究孙迎雪

3310201210ENVIRONMENTALSCIENCEVol．33No．10Oct．2012-12111．1000482．100037-．30±1℃pHpH8.5．pHDO．-NH+4-N90%COD/TN3.0TN8～9mg·L－179%～81%．X703A0250-3301201210-3501-062011-12-012012-03-112008ZX07209-007KM2012100110041973～[e-mail]movalbyPartialNitrification-DenitrificationBiologicalFilterSUNYing-xue1XUDong2TIANYuan1LIYan-fei11.DepartmentofEnvironmentalScienceandEngineeringSchoolofFoodandChemicalEngineeringBeijingTechnologyandBusinessUniversityBeijing100048China2.ChinaNorthwestMunicipalEngineeringDesignInstituteCo．LtdBeijing100037ChinaAbstractThecontrollingfactorsfornitriteaccumulationinpartialnitrificationandmechanismofnitrogenremovalfromthesecondaryeffluentofwastewatertreatmentplantbypartialnitrification-denitrificationbiologicalfilterwereinvestigated．TheresultsshowedthatnitriteaccumulatedwithincreasingofpHvalueintheinfluentundertheconditionoftemperaturewas30±1℃．ThenitriteaccumulationachievedtothehighestatapHvalueof8.5inthisbatchexperiments．Inadditionthenitriteaccumulationpresentedincreasingtendencythroughtheup-flownitrifyingbiologicalfilterwhichcanbeadjustedbythechangesofpHandDOthroughthefilter．TheremovalefficiencyofNH+4-Nwasover90%bythepartialnitrification-denitrificationbiologicalfilter．Meanwhilecarbonsourcesweresuppliedforthedenitrifyingbacteriatoaccomplishdenitrificationprocess．UndertheconditionofCOD/TNatavalueof3.0theconcentrationofTNintheeffluentofdenitrifyingbiofilterwas8-9mg·L－1andtheremovalefficiencyachieved79%-81%stably．Keywordsbiologicalfilterbiofilmbiologicalnitrogenremovalpartialnitrificationdenitrification12．、．、、3．、45．-197520NH+4→AOBNO－2→DBN26．-pH、DO、、7～13．--DOI:10.13227/j.hjkx.2012.10.0363325%40%14～16．33%～35%55%20%CO21617．-．．、18～20．21、、DOpH21～23．-．11.1190L·d－1．0.9～1.1g·cm－33～6mm4～7m2·g－1．100mm1900mm1600mm100mm30～50mm400mm．1100mm100mm100mm800mm200mm．1.2、、、、1Fig．1Schemeoftheexperimentalplant、．NH+4-N、COD、NO－2-N、NO－3-N40～50、60～75、0～0.052～3mg·L－1．CODN-1--24．1.3A2O．3dC、N．10d．15dCODNH+4-N82%79%．pH7.0～8.0NaHCO32d．3dC、N．9dCODNO－3-N65%82%．205310-．22.1pHDO4.5±0.2mg·L－1、30±1℃21pH6.5～9NO－2-NNO－2-NNO－2-NNO－3-N．pHNH+4-N2．pH7.5～9.0NH+4-N＞82%NH+4-N8mg·L－1pH8.5NH+4-NNH+4-N2.5mg·L－1．3pHNO－2-NNO－2-NNO－3-N．NO－2-N0、NO－3-N2～4mg·L－1、NH+4-N43.2～49.6mg·L－1pH＞7.0NO－2-NpH＞7.5＞2.9．pH8.55.5pH9.0．2pHNH+4-NFig．2ConcentrationsofammonianitrogenunderdifferentpHpHNO－2-NpH8.5NO－2-N．pH6.0～7.5pH7.0～8.54．pH7.4～8.3pH8.0pH7.03pHNO－2-N、NO－3-NFig．3VariationsofNO－2-NandNO－3-NconcentrationsunderdifferentpHpH81213．2.2NH+4-N、NO－2-N、NO－3-NCOD47.2±0.5、0.04±0.017、2.86±0.0462±2mg·L－1DO4.7±0.05mg·L－1pH8.52±0.0530±1℃0cm40、80、120160cmpH、DO．4Fig．4Distributionsofnitrogenconcentrationthroughthebiologicalfilter4NH+4-NNH+4-N3.9mg·L－180cmNH+4-NDONH+4-N412．NO－2-N00.04±0.017mg·L－140cm305333＞120cm．NO－3-N2.86±0.04mg·L－140cm5.5±0.24mg·L－1DO2～4.7mg·L－1NO－2-NNO－3-N＞40cmNO－3-N．NO－2-N．NO－2-N/NO－3-N50～80cm40cm2.2NO－2-N212580～120cm120～160cm．2pHDOpH160cmpH7.34．pH4．DO160cmDO1.7mg·L－15．160cmpH7.34DO4＞120cmNO－3-N4．5DONO－2-NFig．5DistributionsofnitrogenconcentrationthroughthebiologicalfilterpHDODO26．DO1～2mg·L－1、9712．Bernet26DO0.5mg·L－15mg·L－1DO0.5mg·L－1．pHDO．DO．27．2.3DO4.7±0.05mg·L－1、pH8.5±0.05、30±1℃NH+4-N、NO－2-N、NO－3-NCOD42.8±3.0、0±0.02、2.6±0.364.7±5mg·L－16．NH+4-N4.4mg·L－13.2～5.2mg·L－190%TNNO－2-NNO－3-N5.8mg·L－1NO－2-N/NO－3-N4.84.0～5.8．6NO－2-NFig．6Concentrationsofnitrogenintheeffluentofpartialnitrificationbiologicalfilter3-60d-405310-1．2.3-．-0～24d125d2．7-COD64mg·L－1CODCOD5.1mg·L－17COD90%．81TN、NO－2-N40.5mg·L－132mg·L－128．7-CODFig．7ChangesofCODconcentrationinthepartialnitrification-denitrificationbiologicalfilter2COD118.6mg·L－1COD/TN3.0COD10.8mg·L－1．NH+4-N4.3mg·L－1NH+4-N4.4mg·L－1NH+4-N．NO－2-N0.5mg·L－1TN8～9mg·L－1TN79%～81%．8Fig．8Efficiencyofnitrogenremovalbythedenitrifyingbiologicalfilter41DO4.5±0.2mg·L－130±1℃pHpH8.5．2NO－2-N/NO－3-N．30±1℃pHDO．3-NH+4-N90%．COD/TN3.0TN8～9mg·L－179%～81%．1BixioDThoeyeCWintgensTetal．WaterreclamationandreuseimplementationandmanagementissuesJ．Desalination20082181-313-23．2ChengHFHuYNZhaoJF．MeetingChina'swatershortagecrisiscurrentpracticesandchallengesJ．EnvironmentalScience＆Technology2009432240-244．3．M．2011.263-273．4．M．．2000.310-314．5AhnYH．SustainablenitrogeneliminationbiotechnologiesareviewJ．ProcessBiochemistry20064181709-1721．6KornarosMDokianakisSNLyberatosG．Partialnitrification/denitrificationcanbeattributedtotheslowresponseofnitriteoxidizingbacteriatoperiodicanoxicdisturbancesJ．505333EnvironmentalScience＆Technology201044197245-7253．7SinhaBAnnachhatreAP．AssessmentofpartialnitrificationreactorperformancethroughmicrobialpopulationshiftusingquinoneprofileFISHandSEMJ．BioresourceTechnology200798183602-3610．8BiswasRBagchiSBihariyaPetal．Stabilityandmicrobialcommunitystructureofapartialnitrifyingfixed-filmbioreactorinlongrunJ．BioresourceTechnology201110232487-2494．9AslanSMillerLDahabM．AmmoniumoxidationvianitriteaccumulationunderlimitedoxygenconcentrationinsequencingbatchreactorsJ．BioresourceTechnology20091002659-664．10GuoJPengYZHuangHJetal．Short-andlong-termeffectsoftemperatureonpartialnitrificationinasequencingbatchreactortreati