MBBR及A20五段法用于污水处理厂提标扩建陈小燕caj201903201436

MBBＲA2/O30038120×104m3/d。10×104m3/d、5×104m3/dA/O《》GB8978—1996。《》GB18918—2002A20×104m3/d、15×104m3/dA/OA2/O+MBBＲ5×104m3/dA2/O20×104m3/d、。A。MBBＲA2/OX703C1000－4602201712－0059－04ApplicationofMBBＲandFive-stageA2/OintheUpgradingandＲeconstructionofUrbanWastewaterTreatmentCHENXiao-yanNorthChinaMunicipalEngineeringDesignandＲesearchInstituteCo．Ltd．Tianjin300381ChinaAbstractThedesigncapacityofawastewatertreatmentplantinHohhotis20×104m3/d．Theconstructionprocesswasdividedintothreephasesandtwophaseshavebeenfinished．Thedesignca-pacityofthefirstandsecondphaseprojectsisrespectively10×104m3/dand5×104m3/d．TheA/OforphosphorusremovalwasadoptedinthebiologicaltreatmentprocessTheeffluentqualitywasrequiredtomeetthesecondarylevelstandardinIntegratedWastewaterDischargeStandardGB8978－1996．TherequirementofeffluentqualityoftheupgradingandexpansionprojectisenhancedtothefirstlevelAstandardinDischargeStandardofPollutantsforMunicipalWastewaterTreatmentPlantGB18918－2002andthedesigncapactiyis20×104m3/d．Thisprojectincludedreconstructionandexpansionthereconstructionprojecttreatmentcapacityis15×104m3/doriginalA/OtankwasmodifiedintoA2/O+movingbedbiofilmreactorMBBＲTheexpansionprojecttreatmentcapacityis5×104m3/dandmodifiedA2/Ofive-stagewasadopted．Furthermoretheadvancedtreatmentstageefficientsedimen-tationtankandmicrofiltrationmachinewithcapacityof20×104m3/dwasbuiltintheproject．ActualoperationresultsshowedthateffluentqualityreachedthefirstlevelAstandard．KeywordsupgradingandreconstructionMBBＲmodifiedA2/Ofive-stage120×104m3/d10×104m3/d200020065×104m3/d2009A/O《》GB·95·331220176CHINAWATEＲ＆WASTEWATEＲVol．33No．12Jun．20178978—1996。2015《》GB18918—2002A。20×104m3/d、、15×104m3/dA2/O+MBBＲ5×104m3/dA2/O。20×104m3/d++++。20×104m3/d45×104m3/d。、1。1、Tab．1Designinfluentandeffluentqualitymg·L－1BOD5CODSSNH3－NTNTP15035018040504．510501058150．52BOD5BOD5、SS、NH3－N、TN、TP143、132、40、47、4．3mg/L。2.1MBBＲ。MBBＲ。2.1.1A/O31170m3A2/O+MBBＲ。。1。好氧2好氧1缺/好氧ＭＢＢＲ填料ＭＢＢＲ填料缺氧2缺氧1缺氧3厌氧区进水回流污泥拦截筛网栏截筛网出水1Fig．1Planofreformbiologicaltank5×104m3/d1．152396m3/h。10℃20d1．5d、6．72d、11．78d/。MLSS3800mg/L0．061kgBOD5/kgMLSS·d0．232kgBOD5/m3·d0．88kgDS/kgBOD56293kgSS/d35429m3。2509m312295m3/3262m312621m3MB-BＲ7862m322621m3。14．96h1．2h、5．9h、7．86h。MBBＲ2752m3。15000Nm3/h。50%～100%300%。541Q=1563m3/hH=11kPaN=10kW。①、、。②。③MB-BＲ、、、。④。⑤DN3502DN350。⑥2。⑦。⑧·06·3312．watergasheat．com。2.1.2MBBＲ①35429m331170m3。/=17362m3×3．8g/L=65975．6kg。=65975．6/1－0．6×3．8+35/100×500×12/1000+3．8×0．6=13038．6m313104m3。=13104×0．6=7862．4m3。=13104－7862=5242m3。=17362－13104=4258m3。=4258/17362=24．5%。=4258/35429=12%。=13104×0．6×35/100=2751．8m3。=13104+2509+12295+3262=31170m3。500m2/m3、。12gMLSS/m2、。②=0．6×500=300gNH3－N/m3·d=12．5gNH3－N/m3·h。0．6gNH3－N/m2·d=0．025gNH3－N/m2·h、。500m2/m3、。0．4。=40－5×50000×0．4=700000g/d。700000/300=2333m3。③2752m3。2.2A2/O。、。2。出水回流污泥预缺氧厌氧缺氧缺氧缺氧好氧（一）好氧（二）好氧（三）后缺氧后曝气进水2A2/OFig．2PlanofmodifiedA2/Obiologicaltank5×104m3/d1．152396m3/h。10℃20d1．62d、1．62d、4．87d、8．97d、1．87d、1．05d。MLSS3500mg/L0．061kgBOD5/kgMLSS·d0．214kgBOD5/m3·d0．87kgDS/kgBOD56221kgSS/d。37247m33021m3、3021m3、9036m3、16698m3、3481m3、1964m3。17．88h1．45h、1．45h、4．35h、8．02h、1．67h、0．94h。15000Nm3/h。50%～100%300%。431Q=2080m3/hH=11kPaN=10kW。、、、、。《》GB3828—2002ⅤTN≤10mg/LMBBＲBOD5、NH3－NTN。320151220161—122。85%SS·16·．watergasheat．comMBBＲA2/O3312BOD5≤10mg/LNH3－N≤5mg/LTN≤15mg/L《》GB18918—2002A3。22016Tab．2Influentqualityin2016BOD5/mg·L－1COD/mg·L－1SS/mg·L－1NH+4－N/mg·L－1TP/mg·L－1pH90%125．56332．18119．8328．674．147．0785%122．14321．59109．2926．953．887．0480%119．48313．42101．5725．663．687．0175%117．25306．5795．3924．613．526．9970%115．28300．5590．1623．693．386．9732016Tab．3Averageeffluentqualityin2016mg·L－1BOD5CODSSNH+4－NTNTP2016847103．1713．50．494①。、MBBＲ。、、。。、。②。2。。1mm2m0．3m。③。MBBＲ2。。、。④。45%。⑤。、。MBBＲ。。5MBBＲ、。MBBＲ、。1．J．20134011141－142．2．MBBＲJ．20143012110－114．3．MBBＲJ．201329259－61．1963－。[e-mail]2017－02－07·26·3312．watergasheat．com