低DO浓度下短程硝化试验研究郝春明

DO郝春明1,李福勤1,宋英豪2,何绪文1(1.中国矿业大学(北京校区),北京100083;2.北京市环境保护科学研究院,北京100037):进水氨氮浓度不变,低DO下启动并运行了短程硝化试验,考察了反应器内的氨氮氧化和亚硝酸盐积累情况。试验结果表明反应器内氨氮几乎全部被氧化,污泥浓度从4500mg/L下降到870mg/L,此时亚硝酸盐的积累率为55%,说明只控制DO的浓度很难实现高的积累率,同时受到温度和污泥龄等的较大影响。:短程硝化;溶解氧;污泥浓度;亚硝酸氧化菌:X703:A:1006-8759(2005)03-0036-03STUDYONSHORT-CUTNITRIFICATIONPROCESSUNDERLOWDOLEVELHAOChun-ming1,LIFu-qin1,SONGYing-hao2,HEXu-wen1(1.ChinaUniversityofMiningandTechnology,Beijing100083,China;2.BeijingMunicipalResearchInstituteofEnvironmentalProtections,Beijing100037,China)Abstract:AnitrificationreactorwasquicklystartedupandoperatedunderlowDOconcentrationwiththesteadyinfluentNH4+/L.Theoxidationofammoniumandnitriteaccumulationwereinvesti-gated.Theresultsshowthattheammoniumwerenearlyoxidatedandsludgechromafalldownfrom4500mg/Lto870mg/L,atthesametime,thenitrosationrate(NO2—N/NO3—N)is55%.Theresultsshowedthatitwashardertorealizehighnitrosationrate,onlybycontrollinglowDO;tem-peratureandsludgeagewerekeyelements.Keywords:short-cutnitrification;DO;sludgechroma;nitritebacteria:2004-09-27:郝春明(1978-),男,河北廊坊人,环境科学专业在读硕士研究生。EnergyEnvironmentalProtectionVol.19,No.3Jun.,20051932005611.1CSTR,,××50cm×25cm×50cm,50L,,。,,。DO,pHPLC。1。1.2,。()、()、()、、。。120mg/L,COD60mg/L。1.3COD:;MLSS:;NH4+-NH3:;NO2-:N-1-()-;:;SV。22.1。,MLSS=4500mg/L。DO0.4～0.75mg/L,pH8.0,2L/min。、COD2。27,CODCOD,80mg/L120mg/L,,20mg/L70mg/L;COD120mg/L60mg/L,COD25mg/L,。COD,3。3COD60%,,60%99%,。,,80mg/L120mg/L,20mg/L70mg/L。Anthonisen[1][2]、pH20,20mg/L,0.6mg/L,,DO。250.14mg/L,,。NO2-NO3-4。NO2-,37NO2-NO3-,50%,,[3]。2.2,DO0.4～0.75mg/L,。郝春明等低DO浓度下短程硝化试验研究·37·COD5。5COD20～25mg/L,COD67%;COD,,。6,6,20870mg/L,870mg/L。,,,。17d,3000mg/L980mg/L,3.4408%16.522%,,;20,870mg/L,,,,55%;。6,22,,,0.3mg/L,,An-thonisen[1][2],0.6mg/L,;25℃,[4]25℃,。。,[3]、[5]90%30℃,30℃。3(1)DO,,55%,,,DO。(2),4500mg/L870mg/L,,,,。:[1]AbelingU.Anaerobic-aerobictreatmentofhigh-strengthammoniumwastewaternitrogenremovalvianitrite[J].Wat.Sci.Tech,1992,26(5～6):1007～1014[2]AnthonisenACetal.Inhibitionofnitrificationbyam-moniaandnitrousacid[J].JWPCF,1976,48(5):835～852.[3],,.[J].,2002,18(11):43～45.[4],,.[J].,2004,30(1):12～14.[5],,.[J].,2003,29(12):52～55.[6]Wong-chongGM,LoehrRC.Kineticsofmicrobialnitrification:nitrite-nitrogenoxidation[J].WatRes,1978,12(8):605～609.[7]MurrayI.etal.Inter-relationshipsbetweennitrogenbalance,pHanddissolvedoxygeninanoxidationditchtreatingfarmanimalwaste[J].WatRes,1975,9(1):25～30.·38·193