城市污水分段进水AO脱氮工艺试验研究王社平

:2005-12-12:(50138020):(1963-),,,,.APO王社平1,2,彭党聪1,朱海荣2,单巧莉1,马亮1,鞠兴华1,黄利彬11.,7100552.,710068:APO:APO,,.,112m3APO.40%,30%,20%10%,50%,70d.:APO,.715h,15d,CODCr,NH4+-NTN93%,9518%6815%;APO30%.:;APO;;:X703:A:1001-6929(2006)03-0075-06APilotStudyonStep-FeedBNRforMunicipalWastewaterTreatmentWANGShe-ping1,2,PENGDang-cong1,ZHUHai-rong2,SHANQiao-li1,MALiang1,JUXing-hua1,HUANGLi-bin11.SchoolofEnvironmentalandMunicipalEngineering,Xi.anUniversityofArchitectureandTechnology,Xi.an710055,China2.Xi.anMunicipalEngineeringDesign&ResearchInstitute,Xi.an710068,ChinaAbstract:Theeconomyofstep-feedbiologicalnutrientremoval(BNR)technologywasdiscussed.ComparedwiththesinglestageAPOprocess,thestep-feedBNRisefficientandcost-effectivefornitrogenandphosphorousremovalfrommunicipalwastewaterwithoutmixedliquidsuspendedsolid(MLSS)return.WiththemunicipalwastewateratBeishiqiaoWastewaterTreatmentCenterofXi.anCityasthetreatmentobject,afour-stagepilot-scalestep-feedBNRwithusefulvolumeof112m3wasemployedandoperatedwith50%ofreturnactivatedsludgeformorethan70days.Thefeedsplittoeachtankis40%,30%,20%and10%oftotalflowraterespectively.Theresultsobtainedshowedthatstep-feedBNRisefficientformunicipalwastewatertreatment,havingrelativelystrongbearingcapabilityagainstimpactload.TheremovalefficienciesofCODCr,NH+4-NandTNcouldreachashighas93%,9518%and6815%respectively,under715hoursofhydraulicretentiontime(HRT)and15daysofsludgeretentiontime(SRT).TheaveragedMLSSmassconcentrationinthereactorisabout30%higherthanthatofsinglestageAPOprocess.Keywords:municipalwastewater;step-feedBNR;sludgeconcentrationgradient;pilot-scalestudy,.,.200256(GB18918-2002).,.,().,,,,,193ResearchofEnvironmentalSciencesVol.19,No.3,2006DOI10.13198/j.res.2006.03.81.wangshp.015.,,,:;,,[1].[2],.,,,[3)4].,,APO,APO.1111APO.111m@112m@110m,4013m@112m@110m,APO,(A)(O)1B3.112m3,,0108m3,0122m3.1,60rPmin;,3Q(DO)2mgPL,4Q(DO)2~3mgPL;..Q(DO),ORP(),pH.1.2APO.1Fig.1Layoutofthestep-feedingsystem112,,1);2);3)APO;4);5);6);7)2APOFig.2Schematicdiagramofstep-feedingBNR.DE.(Q)160LPh,40%,30%,20%10%;1,50%(R=50%Q),1.70d,715h,15d.1130145Lm,,.4e,CODCr,NH4+-N,NO3--N,TNTP,Q(MLSS),pH,Q(DO),ORP..221121111Q(CODCr)CODCr3.Q(TCODCr)(Q(CODCr))300~600mgPL(800mgPL),Q(SCODCr)(Q(CODCr))120~300mgPL;Q(TCODCr)40mgPL,Q(SCODCr)25mgPL.TCODCrSCODCr9311%8810%,CODCr.,3,,Q(CODCr),Q(CODCr),.211707mgP(g#h).21112Q(NH4+-N)Q(TN)4~6,,76193Q(CODCr)Fig.3InfluentandeffluentCODCrmassconcentrationprofileduringexperimentQ(TN)30~48mgPL,Q(NH4+-N)25~50mgPL;TN6815%,NH4+-N9518%.Q(NH4+-N)2mgPL,Q(NO3--N)10mgPL.,TNNH4+-N,TNNO3--N.TN,TN.,,,,,,[1].APO,50%,9313%,6815%,,,4.4,5,,.4Q(NH4+-N)Fig.4InfluentandeffluentNH4+-Nmassconcentrationprofileduringexperiment21113Q(TP)5Q(NO3--N)Fig.5InfluentandeffluentNO3--Nmassconcentrationprofileduringexperiment6Q(TN)Fig.6InfluentandeffluentTNmassconcentrationprofileduringexperimentQ(TP)7.7,,Q(TP)210~815mgPL,Q(TP)016~216mgPL,TP52%~85%,7217%.APO.7Q(TP)Fig17InfluentandeffluentTPmassconcentrationprofileduringexperiment212773:APO21211Q(DO),ORPpHORP,1Q(DO),ORPpH.,Q(DO)2~3mgPL,;ORP100~150mV,ORP-150~-30mV,ORP,;ORP[5].pH7~8,.1Q(DO),ORPpHTable1TypicalDOmassconcentration,ORPandpHineachtankA1O1A2O2A3O3A4O4pH7134713271347127713471177123712171587116ORPPmV-91131-61143-48137-33147))Q(DO)P(mg#L-1)011770210302129021890213212128Q(MLSS)().APO1,,,,Q(MLSS),Q(MLSS),Q(MLSS)APOQ(MLSS).8,Q(MLSS)4115gPL,Q(MLSS)312gPL(APOQ(MLSS)215~315gPL),APOQ(MLSS)APO30%,,Q(MLSS)10mgPL.21213Q(SCODCr)9,Q(SCODCr),40mgPL.,Q(SCODCr),CODCr,CODCr.2121410,11,8Q(MLSS)Fig.8TypicalMLSSmassconcentrationvariationineachtank9Q(SCODCr)Fig.9TypicalSCODCrmassconcentrationvariationineachtankQ(NH4+-N)1mgPL,Q(TN)10mgPL,.4,410%,.10Q(NH4+-N)Q(NO3--N)Fig.10TypicalNH3+-NandNO3--NmassconcentrationvariationineachtankQ(NO3--N),12Q(NO3--N),,2,2,.781911Q(TN)Fig.11TypicalTNmassconcentrationvariationineachtank2,Q(DO)(ORP).:1234217886,311662,314387410257mgP(g#h),Q(DO),;1234181025,121698,1115116141mgP(g#h).4,4.2121512,Q(TP),.Q(TP),Q(TP),,,.12Q(TP)Fig.12TypicalTPmassconcentrationvariationineachtank21216,XSZ-H13.,,,,.(),,.13Fig.13Micrographofactivatedsludge3APO311APOQ(MLSS),:Xn=R1+R#Xr(1),Q(MLSS):Xi=RR+Emi=1QmQ#Xr(2),XnQ(MLSS),Q(MLSS),mgPL;XrQ(MLSS),mgPL;XiiQ(MLSS),mgPL;Qmm,m3Pd;Q,m3Pd;R,%.(1),(2),Q(MLSS),APOAPOQ(MLSS),.8,Q(MLSS)4115gPL,Q(MLSS)312gPL.,APOQ(MLSS)312gPL,APOQ(MLSS)APO30%,,,30%,.312,.APO,50%~100%,200%~300%.APO,50%,,793:APO,.313,,/,0.,,,APO,.4APO:a1APO,APO,,Q(NH4+-N)Q(TN).,TN6815%,NH4+-N9518%,CODCr93%.b1,Q(CODCr),Q(NH4+-N),Q(TN)Q(TP),,.,TP52%~85%,7217%,APO.c1.1,,,,APO30%.,,1P3,.d1,,.:[1],.[J].,2003,19(4):32)36.QiuShenchu,DingTangtang.Step-feedbiologicalphosphorusandnitrogenremovalprocess[J].ChinaWater&Wastewater,2003,19(4):32)36.[2]GorgunE,ArtanN,OrhonD,etal.Evaluationofnitrogenremovalofthestepfeedinginlargetreatmentplants[J].WaterSciTechnol,1996,34(1P2):253)260.[3]FillosJ,DiyamandogluV,CarrioL,etal.Full-scaleevaluationofbiologicalnitrogenremovalinthestep-feedactivatedsludgeprocess[J].WaterEnvironRes,1996,68:132)142.[4]LarreaL,LarreaA,AyesaE,etal.Developmentandverificationofdesignandoperationcriteria