废轮胎媒介A2O工艺的脱氮性能研究林涛

—A2/O林　涛1,　MinKyun-sok2(1.同济大学污染控制与资源化研究国家重点实验室,上海200092;2.庆北国立大学水质管理实验室,韩国)　　　:　将废轮胎切碎后与乙烯-乙酸乙烯酯共聚物(EVA)及沸石按一定比例混合制成一种辅助媒介,并添加至A2/O工艺的好氧段,考察了对脱氮效果的影响。试验结果表明,投加该媒介后可在好氧段内产生大量的微缺氧区,当维持污泥浓度为3～4g/L、DO为1.6～2.4mg/L以及进水C/N值为9～11、pH值为7.7～8.1的条件下,取得了较好的同步硝化反硝化效果,使脱氮能力提高了约13%。　　:　A2/O;　废轮胎媒介;　微缺氧区;　C/N;　同步硝化反硝化:X703.1　　:A　　:1000-4602(2007)05-0035-04StudyonNitrogenRemovalinA2/OProcessCoupledwithWasteTyreMediumLINTao1,　MinKyun-sok2(1.StateKeyLaboratoryofPollutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China;2.WaterQualityLaboratory,KyungpookNationalUniversity,SouthKorea)　　Abstract:　Anauxiliarymediumwasmadebymixingshreddedwastetyres,ethylenevinylacetate(EVA)copolymerandzeoliteincertainproportionandaddedintoaerobiczoneofA2/Oprocesstoinves-tigatetheinfluenceonnitrogenremovalefficiency.Theresultsshowthatafteradditionofthismedium,considerableanoxicmicrozonecanbecreatedintheaerobiczone.Simultaneousnitrificationanddenitrifi-cation(SND)canoccurobviously,whichcontributestoincreasetheTNremovalefficiencyby13%iftheprocessisabletosatisfythefollowingconditions:MLSSof3to4g/L,DOof1.6to2.4mg/L,in-fluentC/Nof9to11andpHof7.7to8.1.　　Keywords:　A2/Oprocess;　wastetyremedium;　anoxicmicrozone;　C/N;　simultaneousni-trificationanddenitrification　　,,,“”,。,。-(EVA),A2/O,—A2/O,,。1　材料及方法1.1　A2/O1。35第23卷　第5期2007年3月　　　　　　　　　　　　中国给水排水CHINAWATERWASTEWATER　　　　　　　　　　　　　Vo.l23No.5Mar.20071　Fig.1　FlowchartofA2/Oprocess　　,2L,;4L,,1.6～2.4mg/L。A2/O3(1),2、3,,。,。1　Tab.1　OperationalmodeofA2/Oprocess123/(Ld-1)484848HRT/h444SRT/d101010/mm8～108～10/%2020DO/(mgL-1)1.6～2.41.6～2.41.6～2.4C/N9～109～1111～141.2　Gisan、NH4ClKH2PO4,COD300～450mg/L(3),TN32mg/L,TP6mg/L。pH,NaHCO3pH7.7～8.1。2,80%,1%。2　Tab.2　Characteristicsofwastetyremedium/(m2g-1)1107/%3.0/%2.1∶EVA4∶1/%74/%23　　,。20℃,,3600mg/L。1.3　:;:N-1-;:;COD:。。2　结果与讨论2.1　COD、BOD53,COD、BOD53。3TPTab.3　COD,BOD5andTPremovalefficienciesindifferentmodesCODBOD5TP/(mgL-1)/(mgL-1)/%/(mgL-1)/(mgL-1)/%/(mgL-1)/(mgL-1)/%1305.230.290.1228.616.592.86.32.461.72335.822.293.4245.613.594.56.52.069.33410.325.893.7317.518.494.26.11.968.1　　3,C/NCODBOD590%;,COD、BOD5,TP。12,COD90.1%93.4%,TP61.7%69.3%。,TP。(),,。23,,36第23卷　第5期　　　　　　　　　　　　　　中国给水排水　　　　　　　　　　　　(0.8mg/L3.5mg/L)。　　,TP(4.18mg/L3.21mg/L4.07mg/L3mg/L),,,(SND)。2.2　3,、2。2　、Fig.2　VariationofNH+4-NandNO-3-Nconcentrationsininfluentandeffluent　　1,82.8%63%,5mg/L。,86.3%,75.9%,(0.8mg/L)。,C/N11,213.4%,COD。,,,,COD,。(3～4)[1]。31,3,。2.3　,,。。,。[2],Nde,ox(,)Nde,ax,。,。3。3　Fig.3　Nitrogenremovalefficienciesinanoxicandaerobicareas　　3(Nde,ox+Nde,ax)/Nre,sys1,。,,90%;1%～3%,。,SND,1.36,53%39%。COD,C/N11～14,1.29,49%38%。,,,SND。,,,(2359%54%)。,37林　涛,等:废轮胎媒介—A2/O工艺的脱氮性能研究第23卷　第5期。,,。3　SND脱氮机理探讨3.1　,、,。3.2　,,,[3～7]。3.3　SND。,,2mg/L,。,COD,。C/N9～11,,;C/N11～14,。COD(),。,,。,,。SND,:(),,。,,SND。4　结论①　A2/O,13%,。②　,3～4g/L、DO1.6～2.4mg/LC/N9～11、pH7.7～8.1,。③　COD。C/N11,SND。:[1]　KojiMishima,TakahikoNishimura,MasahideGo.iChar-actersticsofnitrificationofthemedia-anaerobic-anoxic-oxicprocess[J].WaterSciTechnol,1996,34(1-2):137-143.[2]　BarkerPS,DoldPL.CODandnitrogenmassbalancesinactivatedsludgesystems[J].WaterRes,1995,29(2):633-643.[3]ChiuYing-Chih,ChungMing-Shium.DeterminationofoptimalCOD/nitrateratioforbiologicaldenitrification[J].IntBiodeteriorBiodegrad,2003,51(1):43-49.[4]　ElisabethVMunch,PaulLant,JurgKeller.Simultaneousnitrificationanddenitrificationinbench-scalesequencingbatchreactors[J].WaterRes,1996,30(2):277-284.[5]　ZhaoHongW,DonaldSMavinic,FredericAKoch.Con-trollingfactorsorsimultaneousnitrificationanddenitrifi-cationinatwo-stageintermittentaerationprocesstreatingdomesticsewage[J].WaterRes,1999,33(4):961-970.[6]　KlangduenPochana,JurgKeller.Studyoffactorsaffectingsimultaneousnitrificationanddenitrification(SND)[J].WaterSciTechnol,1999,39(6):61-68.[7]　.[J].,2002,18(2):26-28.:(1979-　),　,　,,　。:(0)13391228313E-mail:[e-mail]:2006-11-2038第23卷　第5期　　　　　　　　　　　　　　中国给水排水