CAST工艺常规模式下脱氮性能研究张磊

4　12环境工程学报Vol.4,No.12201012ChineseJournalofEnvironmentalEngineeringDec.2010CAST张　磊1,2,3　王少坡1,2,3　李玉友1,2,3　于静洁1,2,3　刘艳辉1,2,3　孙力平1,2,3(1.,300384;2.,300384;3.,300384)　　21.6L,,,。,4h(2h,1h)DO2mg/L,MLSS4000mg/L,20%,COD90%。,,,69%。8.0mgNH+4-N/(gMLSS·h),3.3mgNO-3-N/(gMLSS·h)。,CAST。　　　　　　X703.1　　　A　　　1673-9108(2010)12-2683-04StudyonnitrogenremovalperformanceinconventionalmodeofCASTprocessZhangLei　WangShaopo　LiYuyou　YuJingjie　LiuYanhui　SunLiping(1.DepartmentofEnvironmentalandMunicipalEngineering,TianjinInstituteofUrbanConstruction,Tianjin300384,China;2.TianjinKeyLaboratoryofWaterQualityScienceandTechnology,Tianjin300384,China;3.JointLaboratoryofWaterQualityScienceandTechnology,Tianjin300384,China)Abstract　TheremovalperformanceoforganicmatterandnitrogenpollutantsinconventionalmodeofCASTreactorwitheffectivevolumeof21.6Lfeededwithsimulationwastewaterwasstudied.Thelimitingfactorsofni-trogenremovalintheprocesswereanalyzed.Whenthereactoroperated4hinoneperiod,DO2mg/L,MLSSwasabout4000mg/L,theresultshowedthatCODandammoniaremovalcouldget90%.Itcanbefoundthatammonianitrogenwasremovedcompletelyinaerobiczoneandnitrateaccumulationoccurredinatypicalcycle.Totalnitrogenremovalratewasabout69%.Statictestshowedthattheammoniaoxidationratewas8.0mgNH+4-N/(gMLSS·h)andthenitrategenerationratewas3.33mgNO-3-N/(gMLSS·h)intheCASTreactor.Undertheaboveprocessoperatingconditions,CASTnitrogenlimitingfactorswerethesludgerecycleratioandSRT.Keywords　biologicalnitrogenremoval;cyclicactivatedsludgetechnology(CAST);nitrification;denitrifi-cation;municipalsewage:(50808128);(2008ZX07314);(20090460182):2009-10-12;:2010-03-01:(1986～),,,。E-mail:[e-mail]　　(cyclicactivatedsludgetechnol-ogy,CAST),2090。CAST、,。、、,,[1-2]。CASTSBR,,,[3]。,,CAST,(、、),CAST,。41　1.1　,28.8L,21.6L,13.3%,,、、、、。,;,,。,[4]。,1。1　CASTFig.1　DiagramofCASTreactor2h,()2h,1h,1h,4h,6。20%,1∶5,。SV、SVIMLSS,NH+4-N、NO-3-N、NO-2-NCOD。1.2　,。COD:290～320mg/L();NH+4-N:50mg/L(NH4Cl);PO3-4-P5mg/L(KH2PO4);。NaHCO3;22～30℃;pH7.5～8.0。1.3　COD;NH+4-N;NO-3-N;NO-3-NN-(1-)-;PO3-4-P;SV、SVIMLSS[5]。2　2.1　,,,4000mg/L,,10COD90%,。2.2　,(2h,1h,1h),4000mg/L,DO2mg/L。10d,2,COD3。,(、)COD。15min():,;[6]。45。4,35%(35%),NH+4-N。268412　:CAST4　Fig.4　Nitrogenconcentrationofaerobiczoneinacycle15minNH+4-N。NO-3-N,(120min),120min,,。120min,20%,NO-3-N,NO-3-N。NO-2-N,,。5　Fig.5　Nitrogenconcentrationofanaerobiczoneinacycle5,NH+4-N,。15minNH+4-N,15min,。15min,NH+4-N。30minNO-3-N,NO-3-N,。30min135min,NO-3-N,NO-3-N,NO-3-N,NO-3-NNO-3-N,135minNO-3-N,135minNO-3-N,NO-3-N。,NO-3-NNO-2-NNO-2-N。,,、、。,(、、)69%。:,,;[7]。CAST,DO1～3mg/L,DO2mg/L。,,;,,,,,。DOCAST,。DO2mg/L,,,。,20%,,、,(20%),。,CAST,。,,,CAST。,SBR[8]。SBR,1h,,。1h,NH4Cl(50mg/LNH+4-N),KH2PO4,。,(NaHCO3),,0,2h,DO=2mg/L,MLSS=3798mg/L,10min,。6。6,75min,。8.0mgNH+4-N/(gMLSS·h),30min5.3mgNH+4-N/(gMLSS268546　Fig.6　Nitrogenconcentrationinnitrationaction·h),30～60min10.68mgNH+4-N/(gMLSS·h)。3.3mgNO-3-N/(gMLSS·h)。,75min,CAST75min,。,。(4h,DO2mg/L,4000mg/L),。MLSS4000mg/L,13d,0.4kgBOD5/(kgMLSS·d)。CAST[9],。,。,,,。,,,;,。,[7]。15～22d。,,,CAST。3　　(1)CAST(2h,1h,1h)COD90%,69%;,,。(2),75min。8.0mgNH+4-N/(gMLSS·h),3.33mgNO-3-N/(gMLSS·h)。75min。(3)CAST,;CAST。[1],.(CASS).,1999,25(11):5-8[2],,,.CAST.,2006,22(15):58-61[3]Sung-KeunRhee,JayJ.Lee,Sung-TaikLee.Nitriteaccu-mulationinasequencingbatchreactorduringtheaerobicphaseofbiologicalnitrogenremoval.BiotechnologyLet-ters,1997,19(2):195-198[4],,,.CASTC/NDONO-2.,2005,37(3):344-347[5]..:,2002[6].CASTCOD.:,2006[7],..,2000,26(12):1-4[8]GeorgeA.Ekama,MarkC.Wentzel.Denitrificationkinen-ticsinbiologicalandremovalactivatedsludgesystemstrea-tingmunicipalwastewaters.Wat.Sci.Tech.,1999,39(6):69-77[9]MervynC.Goronszy,,WutscheK..(CAST).,1996,12(6):4-102686