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201028A/OC/N＊于令芹 薛 源 杨凤林 安 鹏 柳丽芬(, 116023) :在处理低C/N比城市生活污水时,通过控制溶解氧实现A/O工艺短程硝化反硝化脱氮。结果表明:当DO为(2.0±0.5)mg/L时,亚硝化积累可达67.45%,出水TN浓度为18.97mg/L。结合污泥厌氧水解工艺,将污泥在33℃,不调节pH,厌氧水解18h后的产物上清液与原污水以1∶10混合作为进水,出水TN浓度为14.68mg/L,达《城镇污水处理厂污染物排放标准》一级标准。:A/O工艺;短程硝化反硝化;污泥厌氧水解;低C/N比城市生活污水TREATMENTOFLOWC/NRATIOMUNICIPALWASTEWATERUSINGSHORTRANGENITRIFICATIONANDDENITRIFICATIONINA/OPROCESSSLUDGEANAEROBICHYDROLYSISYuLingqin XueYuan YangFenglin AnPeng LiuLifen(KeyLaboratoryofIndustrialEcologyandEnvironmentalEngineering,SchoolofEnvironmental&BiologicalScience&Technology,DalianUniversityofTechnology,Dalian 116023,China)Abstract:Biologicalnitrogenremovalundershortcutnitrification-denitrificationwasachievedbycontrollingDOinanoxic/oxic(A/O)processdealingwithlowC/Nratiomunicipalwastewater.Theresultshowedthatthestablenitriteaccumulationratiocouldreach67.45%withthedissolvedoxygenof(2.0±0.5)mg/L,theaver-ageTNconcentrationineffluentwas18.97mg/L.Combinedwiththeanaerobichydrolysisprocess,under33℃,thesupernatantofsludgeanaerobichydrolysisafter18hours,withoutadjustingpHwasmixedwiththerawsewageattheratioof1∶10asinfluent.TheaverageconcentrationTNineffluentwas14.68mg/L.Theresultcanmeetthefirstgradein“TheNationalDischargeStandardofPollutantsforMunicipalWastewaterTreatmentPlant”.Keywords:anoxic/oxic(A/O)process;shortrangenitrification-denitrification;sludgeanaerobichydrolysis;mu-nicipalwastewaterwithlowC/Nratio＊(NO.2008ZX07208)。0 、、[1-2]。NH4+-NNO3--NNO3--NNO2--NN2,。、A/O、A2/O、UCT、Bardenph、SBR[3-5]。,,C/N,C/N,,。NH4+-N,NO2--N,。,25%,40%[6],A/O。,、,COD。,(50.2%)、(26.7%)、32DOI:10.13205/j.hjgc.2010.s1.015 201028(20.0%)[7-8],,,。-(A/O),,。1 1.1 实验装置BiofringeNET,。1。1 /mm/mm/(g·cm-3)/(m2·m-3)A3401000.83410O5001000.83410 :A/O。A/O1。(A)(O),5.29L(11.5cm×11.5cm×40cm)11.8L(16cm×11.5cm×64cm),A,,O,,,10L。A,A,。AO。,,,A。1 A/O 7.9L(11.5cm×11.5cm×60cm),,3000r/min,,±1℃,2,,,。2 1.2 原水水质组成、污泥性质及实验条件。,ρ(COD)/ρ(TN)2.65,ρ(BOD5)/ρ(COD)0.5,C/N,2。SBR,MLSS3000mg/L,(SVI)50mL/g。2 mg/Lρ(COD)ρ(BOD5)ρ(NH4+-N)ρ(NO3-)ρ(NO2-)ρ(TN)114.257.4234.310.90.1142.961.3 分析方法:SCOD、NH4+-N、NO3--N、NO2--N、TN、BOD5、DO、MLSS、SVI。《》[9]。,SCOD:(4500r/min)10min,0.45μm,CODSCOD。、COD。DO(Model55,YS1IncorporatedYellowSprings)。1.4 污泥驯化及反应器启动:1)A/O。,3500mg/L。,33 201028(250r/min)(0.2m3/h),24h,,CODA/O,3h、100%。2),8000mg/L,33℃,,,。2 2.1 A/O工艺短程硝化反硝化的实现及对有机物去除效果研究,:(FA)、pH、(25℃)、DO。SHARON、OLAND[10-13],。[14]A/O,。,DO,DO。DO,3。DO(1.0±0.5)mg/L,COD46.09%;NH4+-N44.96%,O,,NH4+-N,,55%,ONH4+-N18mg/L,,TN。DO(2.0±0.5)mg/L,COD62.57%,COD42.51mg/L,NH4+-N94%,,;,TN55.79%。DO(3.0±0.5)mg/L、(4.0±0.5)mg/L,COD、NH4+-N,TN46.07%、41.87%,,NO3--N15mg/L,15%,,NO2--N,NO3--N,。,C/N,。TN,DO(2.0±0.5)mg/L。3 DOCOD、NH4+-NTN DO,DO(2.0±0.5)mg/L,O。DOη,(1)[17]。η=ρ(NO-2-N)ρ(NO-2-N)+ρ(NO-3-N)×100%(1):η;ρ(NO2--N)、ρ(NO3--N)NO2--NNO3--N。4DO(2.0±0.5)mg/L,ONO2--NNO3--N。4,7d,Oρ(NO2--N)、ρ(NO3--N)8.13,3.92mg/L。27.24%73.43%,67.45%。,O(2.0±0.5)mg/L,NO2--N5.29～9.3mg/L,NH4+-NNO2--N,。,,[17],,,,。 ,,DO(2.0±0.5)mg/L,A/O,67.45%,COD、34 2010284 ONO2--N、NO3--NNH4+-N、TN42.51,1.86,18.97mg/L,62.57%、94.67%、55.79%,,,,,。2.2 污泥厌氧水解的研究,,A/O。:、、pH、。[15],33℃、pH5.5～6.5、3d,。pH,,。pH(6.63～7.89),33℃,8000mg/L,。5,0～24h,SCOD,24hSCOD。TN,18d。,,,、、,SCOD。ρ(SCOD)/ρ(TN),18h,ρ(SCOD)、ρ(TN)1338.664218.6mg/L,ρ(SCOD)/ρ(TN)6.12,ρ(COD)/ρ(TN)3.08。24h,SCOD1353.048mg/L,TN241.4mg/L,ρ(SCOD)/ρ(TN)5.6。,,18h。5 2.3 水解-A/O工艺联合运行效果分析A/OTN,TN,,A/O,。[16],A/O,ρ(COD)/ρ(TN)6.3,C/N3.5,,,。,A/O,A/O,A/O,。1∶10(A/O),A/O,COD、NH4+-N、TN243.16,58.35,64.75mg/L,DO(2.0±0.5)mg/L,,6、7,COD0.91kg/(m-3·d-1)1.94kg/(m-3·d-1),TN0.35kg/(m-3·d-1)0.52kg/(m-3·d-1),,COD65mg/L,NH4+-N10mg/L,,7dCOD50mg/L,80.99%;NH4+-N5mg/L,90%;TN14.68mg/L,73.67%,17.88%,COD、NH4+-NTN。35 2010286 COD1-TN;2-TN;3-TN;4-NH4+-N;5-NH4--N7 NH4+-NTN ,,COD128.92mg/L,NH4+-N24.05mg/L,TN21.79mg/L,C/N2.653.76,,;,,VFA()SCOD73.5%,[15],,,TN。TN,。3 1)3h、100%,DOA/O,ODO(2.0±0.5)mg/L,NO2--N5.29～9.3mg/L,67.45%,A/O,COD、NH4+-N、TN42.51,1.86,18.97mg/L,62.57%、94.67%、55.79%。2)8000mg/L、33℃、pH18h,SCOD/TN6.12,COD/TN3.08。3)1∶10,7d,COD18%、19.36%,TN14.68mg/L,GB18918-2002《》。[1].[J].,2000,26(5):104-106.[2].[J].,2002,20(2):9-12.[3]SchmidtI,BockE.Anaerobicammoniaoxidationwithnitrogendi-oxidebyNitrosomonaseutropha[J].ArchMicrobiol,1997,167:106-111.[4]VerstraeteW,PhilipsS.Nitrification-denitrificationprocessesandtechnologiesinnewcontexts[J].EnvironmentalPollution,1998,102:717-726.[5].[J].,2000,18(7):23-25.[6]VoetsJP,VanstaenH,VerstraeteW.Removalofnitrogenfromhighlynitrogenouswastewaters[J].JWaterPollutionControlFed,1975,47:394-398.[7],[M].:,2002.[8],,:[M].:,2002.[9].[M]..:,2002:243-284,368-370.[10]MǜnchEV,LantP,KellerJ.Simultaneousnitrificationanddeni-trificationinbench-scalesequencingbatchreactors[J].WatRes,1996,30(2):277-284.[11]Surmacz-GrskaJ,CichonA,MikschK.Nitrogenremovalfromwastewaterwithhighammonianitrogenconcentrationviashorteranitrificationanddenitrification[J].WatSciTech,1997,36(10):73-78.[12]VillaverdeS,Garca-EncinaPA,Fdz-PolancoF.InfluenceofpHovernitrifyingbiofilmactivityinsumergedbiofilers[J].WatRes,1997,31(5):1180-1186.[13]HellingaC,SchellenAAJC,MulderJW.TheSHARONprocess:aninnovativemethodfornitrogenrem