AO工艺生物除磷和好氧反硝化效果及影响因素研究李亚静

:2006-11-14:(043112011);(04227)。:(1979-),,,。A/OResearchontheEffectandFactorsInfluencingBiologicalPhosphorusRemovalandAerobicDenitrificationbyUsingA/OProcess李亚静　孙力平(天津城市建设学院环境与市政工程系　天津　300384)　采用A/O工艺处理低碳源城市污水,研究了生物除磷和好氧反硝化脱氮效果及其影响因素。试验结果表明:①磷的出水浓度低于0.8mg/L,去除率达到92%～98%;②影响好氧反硝化的主要因素为DO和HRT。当DO控制在2mg/L左右,HRT控制在6h时,好氧反硝化效果最好。增加了脱氮效率,减少了碳源和需氧量。NH4+-N去除率高达94%,总脱氮率可高达76%左右。　A/O　　　　DO　HRTAbstract　EffectandthefactorsinfluencingbiologicalphosphorusremovalandaerobicdenitrificationwerestudiedusingA/Oprocesstreatmunicipalwastewaterwithlowcarbonsource.Theresultsshowedthat:①EffluenttargetofPhosphorusisunder0.8mg/L,theremovalratecanreach92%～98%;②DOandHRTarethekeyfactorsinfluencingaerobicdenitrifi-cation.ThedenitrificationeffectisthebestwhenDO=2.0mg/L,HRT=6h,whichtheTNremovalratioisincreasedandthequantityofcarbonsourceandoxygendemandisdecreased.Finally,NH+4-Nremovalratiocanreach94%,andTNre-movalratiocanreachabout76%.Keywords　A/OProcess　MunicipalWastewaterwithlowCarbonSource　BiologicalPhosphorusremoval　AerobicDenitrification　DO　HRT　　A/O,[1]。92%～98%,50%,[2],A/O,,。,。,(SND),[3～7]。SND。[3,8,9]:,DO,1。1　　　DO,、;,—19—A/O　DOI:10.16803/j.cnki.issn.1004-6216.2007.04.007,,;,SND。DO,,DOSND。A/ODO,HRT,,,。1　1.1　2,SBR,76cm,30cm,,40L。10cm(),,。,。,1。2　SBR1　mg·L-1NaAc·3H2OK2PO4·3H2ONH4CL200/mgCOD·L-110/mgP·L-110/mgN·L-10.6/mL·L-11.2　/SBR6h,,2h,3h,1h。3500mg/L,10d。1.3　CODHACHCOD[10];PO43--P[10];MLSS[10];NH4+-N[10];TN[10];DOYSI5000[10]。2　2.1　40,SBR,COD85%,92%～98%,0.8mg/L,3。3　COD,2.2　2.2.1　溶解氧的影响　　DO1.0、2.03.0mg/L(±0.2mg/L)DO。3DOCOD、NH4+-N、TN,3,2,DO,NH+4-N4,DOTN5。2　3DODOmg·L-1COD%NH4+-N%TN%PO43-P%1.02.03.094.197.095.680.097.9100.063.476.369.791.894.995.74　DONH4+-N—20—　33　4　200785　DOTN　　2,45,DOCOD,、。DO3mg/L,DO,,;DO1mg/L,,,,DOCOD,TN。,。,DO,DO2mg/L。2.2.2　HRT的影响　　,HRT。DO2.0mg/L,。6。6,6　COD、NH4+-NTN2hCOD,85.0%,NH4+-NTN。3hNH4+-N0.6mg/L,72.0%,,95.0%。6。6,,3hNH4+-NTN,,。,3h,HRT6h。COD85%,94%,TN76%,。3　(1)SBR,:0.8mg/L,92%～98%。(2)DOHRT。DO2mg/L,,76%,HRT6h,。　　　1.,,.SBR[J].,1999(8):9～14.2.OISSONG,NEWEILB.WastewaterTreatmentSystem:Model-ing,DiagnosisandControl[M].London:IWAPublishing,1999.3.BruceE,Rittmann,WayneEL.Simultaneousdenitrificationwithnitrificationinsingle-channeloxidationditchesJourna[J].WPCF,1985,57(4):300～308.4.PochanaK,KellerJ.Studyoffactorsaffectingsimultaneousni-trificationanddenitrification(SND)[J].WatSciTech,1999,39(6):61～68.5.PochanaK,KellerJ,LantP.Modeldevelopmentforsimultane-ousnitrificationanddenitrification[J].WatsciTech,1999,26(3～4):511～522.6.RobertsonLA.Simultaneousnitrificationanddenitrificationinaerobicchemostatculturesofthiosphaerapantotropha[J].Ap-pliedandEnvironmentalMicrobiology,1998,54(11):2812～2818.7.,,.[J].,2002,21(9):527～529.8.,,.[J].,1998,24(12):6～9.9.,,,.[J].,2000,26(4):17～20.10..[M].3,:,1989.248～250.—21—A/O