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112323111．5100062．5282003．528200SBＲ25℃25、20、15、10、5℃。25℃96．5%95．2%5℃17．3%6．9%AOBNOBCODCOD。X703C1000－4602201507－0065－0451278133、51178125S2013010013943EffectofLowTemperatureonStableShortcutNitrificationSystemＲONGHong-wei1DENGJie1YANGWen-jie23ZENGJun23XUEHeng-ning1LUOMing-jie11．KeyLaboratoryforWaterQualitySecurityandProtectioninPearlＲiverDelta＜MinistryofEducationandGuangdongProvince＞GuangzhouUniversityGuangzhou510006China2．GrandblueEnvironmentCo．Ltd．Foshan528200China3．GuangdongProvincialKeyLaboratoryofUrbanWaterCycleandWaterQualitySecurityTechnologyFoshan528200ChinaAbstractAmmonianitrogenwastewaterwastreatedbyusingsequencingbatchreactorsSBＲtoinvestigatetheeffectoflowtemperatureonshortcutnitrificationprocess．Theeffectsoftemperaturesof25℃20℃15℃10℃and5℃onstableshortcutnitrificationsystemdomesticatedat25℃werestudied．Theresultsshowedthattheeffectonshortcutnitrificationprocessincreasedgraduallywiththedecreaseoftemperature．Theammonianitrogenremovalrateandnitritenitrogenaccumulationrateweregraduallyreducedfrom96．5%and95．2%at25℃to17．3%and6．9%at5℃respectively．TheeffectoflowtemperatureontheammoniaoxidizingbacteriaAOBwasgreaterthanthatonthenitriteoxidizingbacteriaNOB．TheCODdegradationtimewasprolongedasthedecreaseoftemperaturebutthefinalconcentrationofCODintheeffluentfromthereactorwasnotaffected．Shortcutnitrificationsys-temwasnotdestroyedundertheconditionoflowtemperatureinashortperiodoftimeandtherunning·56·31720154CHINAWATEＲ＆WASTEWATEＲVol．31No．7Apr．2015effectrecoveredquitewellwiththeincreasingoftemperature．KeywordsshortcutnitrificationlowtemperatureammonianitrogenremovalratenitritenitrogenaccumulationrateNH+4－N→NO－2－N→N212。、、34。。。5。。SBＲNH+4－N=50mg/L。11.1SBＲ1。SBＲ20cm44cm10cm13L12L。/、、DOpHDOpH。。1SBＲFig．1SchematicdiagramofSBＲsystem1.2COD120mg/LNH4Cl50mg/LpH=8．0～8．5MLSS3500mg/L。360min、30min、10min。5℃。1.3、AOB、NOBPCＲDO、pHOＲPMLSS、MLVSS、COD、NH+4－N、NO－3－N、NO－2－N。22.1NaHCO3DO0．5mg/L、pH8．5COD120mg/L3500mg/L25℃360min、30min、10min·66·317．watergasheat．comDOpHDOpHAOBNOBAOB25℃。50d95%。320minDO0．5mg/L320minDO320DOpH。2。320minDODO。250dFig．2Variationofeffluentnitrogenconcentrationafter50days4NH+4－NNO－2－N。96．9%95%。SBＲDO0．5mg/L、pH8．51．0mg/L。2.225℃。5℃。20d3。3Fig．3Variationofammonianitrogenremovalrateandnitritenitrogenaccumulationratewithdifferenttemperatures325℃96．5%、95．2%2h12．5mg/L·h25℃20℃82．7%、88．4%15℃65．4%62．1%15℃50%15℃10℃46．6%、31．9%25℃12．5mg/L·h1．4mg/L·h5℃17．3%6．9%5℃。SBＲCODCOD120mg/LCOD14mg/LCOD25℃2h3．5hCOD14mg/L5℃5．5h14mg/L。·76·．watergasheat．com3175℃25℃10d。5℃10d97%95%。。2.3PCＲ、AOBNOB1。1、AOBNOBTab．1NumbersofAOBNOBandtotalbacteriaatdifferenttemperatures·ng－1AOBNOB/℃252．01×1093．64×1071．84×105201．61×1092．64×1071．29×105151．08×1091．34×1079．7×104107．99×1085．61×1067．0×10452．57×1083．23×1063．41×104125℃AOBAOBNOBAOBAOBNOBAOBNOB5℃AOBNOB3．23×1063．41×104/ng。AOBAOB。3①。25℃96．5%、95．2%5℃17．3%6．9%。②SBＲCOD。③AOBNOB。1．/J．201430191－510．2．/J．2013291724－27．3．J．201329111－5．4．/SBＲJ．201329920－2328．5．J．2004245618－622．1973－。E－mailrhwcn@139．com2014－10－10·86·317．watergasheat．com