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19220064POLLUTIONCONTROLTECHNOLOGYVol.19,No.2Apr.,2006CAST 1,2(1.姜堰市环境保护局,江苏姜堰 225500;2.姜堰市环境监测站,江苏姜堰 225500) :,CAST,CODNH3-N。,CODNH3-N,3h。:;CAST;:X703.1 :AExperimentalStudyonCASTCraftAerationTimeYINKun1,QINGJun-fang2(1.JiangyanEnvironmentalProtectionBureau,Jiangyan,Jiangsu225500,China;2.JiangyanEnvironmentalMonitoringStation,Jiangyan,Jiangsu225500,China)Abstract:Onthebasisofdomasticsewagetreatmentplantdesign,itisdiscussedthattheinfluenclofaerationtimeontheeffeatofCASTcraft.TheoxperimentalstudyindicatesthatprolongingtheaerationtimecarbenefittheCODandNH3-Nremoval,thesuitableaerationtimeis3h.Keywords:Jiangyancity;CASTcraft;aerationtime:20051110;:20051129: (1973—),,,,,。 ,,,CAST、,[1]。CAST,6t/d,3t/d,[2]。1 ,1。1 COD/(mg·L-1)60NH3-N/(mg·L-1)15pH6～9CAST,,A,B,C,,。,0.9m×0.4m×0.49m,0.45m,162L,、、1∶5∶30。1。A—;B—;C—1 CAST: 19,、。(),RDB-11,200mL/min。HL-4。7312-I,,。,,。,15WZX0.8-10,。2 :HBA-101COD、721、、LZB-25、、101-3、TA328A、、、SBR。:、、、、、、、、、、、、、、、、、、、、、、、、。3 3.1 曝气时间对COD去除率的影响COD2。2,,COD,1h81.1%6h91.9%,COD,1h72mg/L6h30.4mg/L,3h32mg/L,。2 CODCAST,,,,,COD[3]。1h,1h,,,,,。3h,2h,。3.2 曝气时间对NH3-N去除率的影响NH3-N2。2,NH3-NCOD,,。1h78.4%6h92.6%,NH3-N,1h7.49mg/L6h3.4mg/L。,NH3-N,NH3-N,CAST。[4]2 NH3-N/h123456NH3-N/(mg·L-1)34.643.83536.14246NH3-N/(mg·L-1)7.494.942.692.322.83.4/%78.3588.7292.3193.5793.3392.614 ,,NH3-N,,CODNH3-N,。COD3h,91.77%,NH3-N92.31%,《》。3hCODNH3-N,,,TPTN。,3h。[][1] GORONSZYC,,WUTSCHERK.(CAST)[J].,1996,12(5):4.[2] [R].:,2003.[3] WatSciTechIntermittentOperationoftheExtendedAerationProcessforSmallSystems[J].JWaterPollutControlFed,1995,32(9-10):105-114.[4] , .[J].,2000,26(12):1-4.8