SDAO工艺污水厂提标改造为A2O和MUCT工艺的对比试验aad52217b307e87100f6

Vol．3No．3May2013JournalofEnvironmentalEngineeringTechnology33201351674－991X201303－0195－072013－01－072012ZX07202－0052012ZX07202－0101988—[e-mail]*1967—[e-mail]2OMUCT杨鹏程1，2，3，田智勇2，3，宋永会2，3*，杨永哲1，傅博思远2，3，李魁1，21．7100552．1000123．100012SDAOA2OMUCT。CN3.25A2OMUCTCODCrNH+4-N90.0%TNTP。CN6.75A2OTN75.6%TN15.6mgLTP78.8%TP1.4mgL。MUCTTNTP62.8%37.3%TNTP25.32.8mgL。MUCTTNTP20.30.9mgL72.8%86.8%。SDAOA2OMUCTCODCr、NH+4-NTNGB18918—2002《》ATPBA。SDAOA2OMUCTX703.1Adoi10.3969j．issn．1674-991X．2013.03.032ComparativeExperimentalStudyonA2OandMUCTProcessesfortheImprovementofDischargeStandardsandReconstructionofWastewaterTreatmentPlantwithSDAOProcessYANGPeng-cheng123TIANZhi-yong23SONGYong-hui23YANGYong-zhe1FUBo-siyuan23LIKui121．SchoolofEnvironmentalandMunicipalEngineeringXi＇anUniversityofArchitectureandTechnologyXi＇an710055China2．StateKeyLaboratoryofEnvironmentalCriteriaandRiskAssessmentChineseResearchAcademyofEnvironmentalSciencesBeijing100012China3．DepartmentofUrbanWaterEnvironmentalResearchChineseResearchAcademyofEnvironmentalSciencesBeijing100012ChinaAbstractBasedonthebiologicalnitrogenandphosphorousremovalmechanismsthetreatmenteffectsanddifferencesoftransformingSDAOprocessintoA2OprocessandMUCTprocesswithoutadditionalbuildingandapparentstructuralmodificationwerestudied．TheresultsshowedthattheremovalefficiencyofCODCrandNH+4-Ninbothprocessescouldreachabove90．0%butwiththerelativelylowTNandTPremovalefficienciesundertheconditionofinfluentCN=3．25duringtheearlydomesticationperiod．Nitrogenandphosphorousremovalefficiencycouldbeconsiderablyimprovedbysupplementingadditionalcarbonsource．AfterimprovingtheCNto36．75andkeepingtheA2OprocessatstableoperationtheTNandTPremovalefficienciesof75．6%and78．8%couldbereachedwitheffluentTNof15．6mgLandTPof1．4mgLrespectively．TheremovalefficiencyofMUCTprocesswasnotasgoodasA2OtheremovalefficienciesofTNandTPwere62．8%and37．3%andtheaverageeffluentTNandTPwere25．3mgLand2．8mgLrespectively．Step-feedcouldimprovetheremovalefficienciesofMUCTunderstableoperationstheTNandTPremovalefficienciescouldbeimprovedto72．8%and86．8%witheffluentTNof20．3mgLandTPof0．9mgLrespectively．InconclusiontheA2OprocesshadmoreobviousadvantagesthantheMUCTprocesswhenusedfortheimprovementofdischargestandardsandforthereconstructionofSDAOprocess．TheeffluentCODCrNH+4-NandTNofA2OprocessmettherequirementsofClass1AdischargestandardsoftheNationalStandardGB18918-2002whiletheeffluentTPcouldmeettheClass1BstandardandadditionalchemicalphosphorusremovalwasthusrequiredtomeettheClass1Adischargestandard．KeywordsSDAOprocessimprovementofdischargestandardsandreconstructionA2OMUCTcomparison“”GB18918—2002ACODCr、NH+4-N、TNTP1、。“”。8.0m3dSDAO2AO。60m8.3m28.7m44.9m。。CODCr≤100mgLBOD5≤20mgLNH+4-N≤10mgLGB18918—2002TNTP。CODCr60.0mgLTN25.0mgLNH+4-N15.0mgLTP2.8mgLGB18918—20022。AO3GB18918—2002AAO。A2Oanaerobic-anoxic-oxicprocessMUCTmodifieduniversityofcapetownprocessAO。SDAOA2OMUCT。14MUCTA2O。HRT。。A2OSDAOA2OSDAOMUCTSDAO、。22.15-7SDAOMUCTA2OSDAO。23Lh1。A2O、、35.6、51.5·691·3SDAOA2OMUCT68.5L1.60、2.573.14hMUCT、、31.8、6.2、31.8127.2L1.44、0.28、1.445.78h。1—2—3—4—5—6—7—8—9—。1A2OMUCTFig．1SchematicdiagramoftestedA2OandMUCTprocesses2.20.45μmpH2。NH+4-NNO－2-NN－1－－TNTPMLSS、MLVSS8NO－3-N9CODCr10pHpHStarter3cDOWTWOxi330iSET。2.3。8000mgLSV90%MUCT15.0LA2O8.1L。。CODCr278.9±120.1mgLTN78.0±7.1mgLTP7.7±0.8mgL。CODCr350.0mgLTN46.8mgLTP3.6mgL。。C∶N∶P480gCODCrTNCN6.0～7.0。2.411-12。ⅠCN3.25MLSS2500mgL。Ⅱ480gCN6.75。MLSS2500～3000mgL13-14。SRT15d15。MUCTMLSS2520mgL2990mgL2020mgL2322mgL。A2OMLSS2671mgL2573mgL2958mgL。20.1～27.3℃pH7～8DO0.1mgLDO4.0mgL。MUCT0.62.51.016。A2O0.6172.518。CODCr486.1±175.2mgLTN71.3±8.4mgLTP7.09±0.43mgL。MUCT21～6869～1030.5∶0.519。33.12。2Ⅰ10dCODCrNH+4-N95.0%90.0%·791·3CN。ⅡCN6.75SRT。16～202500mgL。A2OTNTP151mgL80.5%80.2%MUCTTNTP154.5mgL77.4%42.8%。。CODCrTN、TPMUCTCODCr。2A2OMUCTFig．2ThecomparisonoftreatmentperformancesbetweentheA2OandMUCTprocessesinthesludgeacclimationstage3.2A2OMUCT20.0～27.3℃pH7.0～8.0DO0.1mgLDO4.0mgLCN6.75。MUCT21～6869～1030.5∶0.5。83NH+4-N、CODCr、TN、TP3。3·891·3SDAOA2OMUCT3A2OMUCTFig．3ThecomparisonoftreatmentperformancesbetweentheA2OandMUCTprocessesinthestableoperationstageCODCr。CODCr350.0～550.0mgL。21～48A2ONH+4-NCODCr94.9±6.7%89.6±6.1%MUCTNH+4-NCODCr97.4±1.9%91.8±5.4%A2OTN、TP76.8±5.1%、81.1±5.5%MUCTTN、TP65.3±8.3%、51.2±9.9%。MUCTCODCrA2OMUCTA2OHRT。A2OMUCT、CODCrGB18918—2002A5.050.0mgL。A2OTN15.6±4.3mgLTP1.4±0.5mgLMUCTTN25.0±5.2mgLTP3.5±0.9mgL。A2OTNGB18918—2002ATPB。MUCT。49A2O。NH+4-N28.7mgL57.0%85NH+4-N5.0mgL。。49CODCr、TN89.8%·991·350.7%51.935.7mgL。TP88.2%0.6mgL。50～68A2OTNTPTNTP53.9%85.6%。21～68MUCTTN62.8%。TP57.9%。CODCr。69～103A2ONH+4-N85NH+4-N4.86±1.71mgL。TN19.8±3.3mgLTP0.68±0.33mgLCODCr32.1±15.6mgL。MUCT69～103NH+4-N2.16±1.74mgLCODCr34.0±18.1mgLTN20.3±2.1mgLTP0.9±0.4mgL。MUCTTN、TPA2O。4MUCTTNA2O1MUCTCODCr2MUCTTN3MUCT。MUCTMLSS2020mgLA2O2573mgL。MUCT。MUCT。20。MUCTSDAO。A2O。。A2O21～48TPGB18918—2002A21～48。10—11。MUCT。A2O、。TN、TPSDAO。A2OMUCTMUCTGB18918—2002A21SDAO。51SDAOA2OMUCT。、、。2A2OMUCTCODCrNH+4-NGB18918—2002ATN、TPTNTP。3A2OMUCT21