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A2/OMarkvanLoosdrecht－100044A2/OUCTA2/OUCTUCT。A2/O。UCTA2/ODPB。UCTSS5%～6%SS10mg/LTP。SS5mg/LUCTAA。、。A2/OUCTA2/OTU992．3A1000－4602201721－0018－0751578036“”2017DiscussiononSuitabilityofA2/OProcessforUpgradingofWastewaterTreatmentPlantHAOXiao-diLITian-yuWUYuan-yuanMarkvanLoosdrechtSino-DutchＲandDCentreforFutureWastewaterTreatmentKeyLaboratoryofUrbanStormwaterSystemandWaterEnvironment＜MOE＞BeijingUniversityofCivilEngineeringandArchitectureBeijing100044ChinaAbstractOnthebackgroundoftheA2/OprocesswidelyappliedinChinacomparativesimula-tionsbetweenUCTandA2/OdemonstratethatA2/OisalittlebitinferiortoUCTinNremovalbutfallsbehindUCTinPremoval．AlthoughtheinvertedA2/OprocesscanavoidtheeffectofnitrateinreturnsludgeonanaerobicreleaseofphosphatethisactionwillcompletelydamagePremoval．MoreoverUCToverA2/OcanaccumulatemoreDPBinthesystemwhichwouldenhancesimultaneousN＆Premovalandalsosaveaeration．HoweverthegoodbehaviorofUCTinPremovalcanresultinahigherPcontent5%－6%ineffluentSS10mg/LwhichwilldefinitelycauseahigherTPconcentrationinefflu-ent．LoweringSS5mg/Lineffluentassociatedwithexternalcarbonadditionorphosphateprecipitati-oninsidestreamwouldmeettheneedofthestateeffluentdischargestandardsAandevenreachthestrictlocalstandardsofBeijingA．Phosphateprecipitationinsidestreamandexternalcarbonadditionhavedifferentapproachesbutequallysatisfactoryresultswhichcanapplychemical＆biologicalPre-·81·3321201711CHINAWATEＲ＆WASTEWATEＲVol．33No．21Nov．2017movalstotheutmostandalsoavoidaddingexternalcarbonandrealizephosphaterecovery．KeywordsA2/OUCTinvertedA2/Oexternalcarbonadditionphosphateprecipitati-oninsidestreamdenitrifyingphosphorusremovingbacteriaDPB。。BNＲ、1。A2/OA2/OMBＲ、。UCTA2/OUCTNO－3－NPAOs/DPBA2/O23。A2/OUCTPAOs/DPB。、UCTA2/O、A2/OUCT。MBＲSSSS5mg/LUCTA2/O。。1TUDASM、、4～8。TUDAQUASIM2．0A2/O、UCT、A2/O。1.12×104m3/d1。COD9CODSI、SA、SF、XI、XS24、32、72、137、55mg/L。1Tab．1Annualaverageinfluentqualitymg·L－1CODBOD5SSNH+4－NTNTP32016018548607．51.2A2/OA2/OHＲT13hHＲT3hHＲT3hHＲT7hHＲT3．6hQAQin200%QＲ100%SＲT15dDO2mg/L10～12。1。1A2/OFig．1FlowchartofmodeledA2/OprocessAQUASIM2．0—5。60%40%、PAOs、、21。1.3UCTUCTA2/OQB2。2UCTFig．2FlowchartofmodeledUCTprocess·91·．watergasheat．comA2/O33211.4A2/OA2/OA2/OA2/O。22.112℃20℃。1025℃。SSA2～4。2A2/OTab．2SimulatedresultsofA2/Oprocessmg·L－110℃12℃20℃25℃COD32034．734．634．434．3SCOD12824．624．524．524．5SS18510101010TN6016．615．912．111．7NH+4－N486．55．00．40．3NO－3－N09．310．21110．7TP7．50．940．870．850．75PO3－4－P4．860．460．380．260．1110℃MLSS3708、3703、3696、7211mg/L12℃3605、3597、3579、7000mg/L20℃3169、3157、3147、6132mg/L25℃2963、2945、2935、5716mg/L。3UCTTab．3SimulatedresultsofUCTprocessmg·L－110℃12℃20℃25℃COD32034．634．534．434．3SCOD12824．524．424．424．4SS18510101010TN6016．415．412．311．6NH+4－N482．91．20．20．1NO－3－N012．613．411．410．8TP7．50．720．700．660．70PO3－4－P4．860．200．160．060．0510℃MLSS2171、4147、4141、8100mg/L12℃2111、4026、4020、7862mg/L20℃1866、3535、3527、6891mg/L25℃1742、3286、3277、6399mg/L。4A2/OTab．4SimulatedresultsofinvertedA2/Oprocessmg·L－110℃12℃20℃25℃COD32034．834．834．734．6SCOD12824．424．424．424．4SS18510101010TN6014．813．812．011．6NH+4－N484．12．80．30．1NO－3－N09．910．311．111．0TP7．55．615．595．904．60PO3－4－P4．865．455．445．794．3310℃MLSS3516、3515、3506、6844mg/L12℃3523、3522、3517、6859mg/L20℃3099、3096、3090、6019mg/L25℃2920、2916、2910、5666mg/L。SS10mg/L2～4SSCOD、N、P5。5SSCOD、N、PTab．5ContentsofCODNandPinSSofeffluentsmg·mg－1/℃10122025A2/OCOD1．011．010．990．98N0．0780．0710．0680．066P0．0480．0490．0590．064UCTCOD1．011．011．000．99N0．0870．0750．0700．067P0．0520．0540．0600．065A2/OCOD1．041．041．031．02N0．0880．0790．0740．070P0．0160．0150．0110．0272～4CODSCOD≤25mg/L。20℃UCTNH+4－NA2/OA2/O。COD20℃UCTNO－3－N1～3mg/L。TNSSN20℃A2/O1～2mg/L。PO3－4－PTPA2/OUCTA2/O。·02·3321．watergasheat．comA2/O。A2/OCODVFAsPAOs/DPBVFAsPAOs/DPBCOD。A2/O。。UCTNO－3－NPAOs/DPBVFAsA2/O。UCTQA+QＲ300%NH+4－NA2/O100%UCTA2/O。300%CODNO－3－N。5SSCODNP。A2/OSSPSS2%SSPAOs/DPB。UCTA2/OSSP5%～6%UCTA2/OPAOs/DPB。2.2DPBDPBUCTA2/O1314O2。6A2/OUCTPAOsDPB。6Tab．6Contributionrateofdenitrifyingphosphorusremoval/℃10122025PAOs/mg·L－19．6/14．89．8/15．313．8/19．116．2/20．8/%63．8/76．263．2/77．170．9/80．270．1/77．1/%36．2/23．836．8/22．929．1/19．829．9/22．9A2/OUCT。6A2/OPAOsUCT22%～35%UCTPAOs20℃＞30%DPB20℃A2/O12%～14%。UCT。UCTA2/O。3SSUCTA2/OSS10mg/LTPA。N、PSSMBＲ。MBＲSS≤5mg/L。SS5mg/L。SS5mg/LN、P。SS=5mg/L7。7A2/OUCTTab．7SimulatedresultsofA2/OandUCTprocessmg·L－1/℃10122025COD29．6/29．529．6/29．529．6/29．629．5/29．4SCOD24．6/24．424．5/24．424．5/24．524．5/24．4TN15．9/16．015．3/15．011．9/12．111．4/11．4NH+4－N6．1/2．54．7/1．00．4/0．20．3/0．1NO－3－N9．5/13．010．5/13．411/11．410．7/10．8TP0．70/0．460．63/0．430．56/0．370．44/0．38PO3－4－P0．46/0．200．38/0．160．26/0．060．12/0．0510、12、20、25℃A2/OMLSS3698/3689/3670/7184、3696/3687/3668/7180、3277/3261/3251/6342、3066/3048/3038/5923mg/LUCTMLSS2229/4263/4257/8333、2162/4130/4123/8069、1916/3636/3627/7092、1796/3394/3385/6615mg/L。7SSTPUCTTP·12·．watergasheat．comA2/O3321AA2/O。UCTPAOs/DPBSSP5%～6%SSTP。SSMLSS100mg/L。4UCTUCTA2/O。UCTADB11/307—2013BSS=10mg/LCOD=30mg/LTN=15mg/LNH+4－N=1．5/2．5mg/LTP=0．3mg/LASS=5mg/LCOD=20mg/LTN=10mg/LNH+4－N=1/1．5mg/LTP=0．2mg/L。SSCOD。C/PC/P15。4.1COD1．1CODSASF40mg/L40mg/LXSSI、SA、SF、XS、XI24、62、82、97、55mg/L。CODSS=5mg/L8。8UCTTab．8Simu