复合式曝气生物滤池脱氮效果影响因素研究杨跃

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140   Vol.36 No.7 2010杨 跃1 张金松1,2 黄文章2(1, 150090;2(), 518031)   以某城市污水处理厂二级出水为原水,通过中试研究了复合式曝气生物滤池(CBAF)用于再生水回用的脱氮效果的主要影响因素,包括碳源投加量、气水比和水力负荷。试验结果表明,当碳源投加量为15~25mgCODCr/L,气水比为2∶1,水力负荷为10m3/(m2·h)时,CBAF运行工况最优,脱氮性能稳定良好。当进水氨氮浓度为1.0~17.4mg/L,总氮浓度为7~23mg/L时,出水氨氮浓度始终低于2mg/L,总氮浓度低于15mg/L,出水水质满足《城市污水再生利用景观环境用水水质》(GB/T18921—2002)的相关要求。 复合式曝气生物滤池 深度处理 再生水 脱氮 影响因素InfluencingfactorsonnitrogenremovalofcombinedbiologicalaeratedfilterYangYue1,ZhangJinsong1,2,HuangWenzhang2(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.ShenzhenWater(Group)Co.,Ltd.,Shenzhen518031,China)Abstract:Apilot-scalestudywasconductedoncombinedbiologicalaeratedfilter(CBAF)toinvestigatemaininfluentfactorsonnitrogenremovalperformanceforreclaimedwaterreuse,withthesecondaryeffluentfromaWWTPasfeedwater.Themaininfluencefactorsincludedaddedcarbonsourcedosage,ratioofairtowaterandhydraulicloadingrate.Moreover,theoptimaloperationmodeofCBAFwasasfollowing:addedcarbonsourceas15~25mgCODCr/L,theratioofairtowateras2∶1,andhydraulicloadingrateas10m3/(m2·h),underwhichCBAFhadanexcellentandstableremovalperformanceofnitrogen.WhentheconcentrationsofNH3—NandTNintheinfluentwere1.0~17.4mg/Land7~23mg/Lrespectively,theconcentrationsintheeffluentwerelowerthan2mg/Land15mg/Lrespectively.Thewaterqualityoftheeffluencemettherequirementsof“Thereuseofurbanrecyclingwater—Waterqualitystandardforscenicenvironmentuse(GB/T18921—2002)”.Keywords:Combinedbiologicalaeratedfilter(CBAF);Advancedtreatment;Reclaimedwater;Nitrogenremoval;Influencefactors0 (BiologicalAeratedFilter,BAF)[1~3]。,,[4,5]。BAF、pH、、[6,7]。(CombinedBiologicalAeratedFilter,CBAF),,,DOI:10.13789/j.cnki.wwe1964.2010.07.010 Vol.36 No.7 2010141  ,,。,CBAF,。1 1:250×6300mm,,,,3~6mm,2.4m,,4~8mm,1.5m,。,30cm。1 《》(GB/T18921—2002)1。,14d。1,,,(≤15mg/L),。CBAF、pH、、、。20~25℃,pH6.8~1 NH3—N/mg/LTN/mg/LNO-3—N/mg/LBOD5/mg/LDO/mg/L/℃1.0~17.4(10.6)7.1~23.0(17.1)3.8~8.1(5.7)3.1~10.0(7.5)1.4~3.9(2.5)20~25(22.3)5155 :。7.2,;(BOD5≤10mg/L),,;,CBAF,。,、。2 2.1 ,,[8]1(8mg/L),25mgCODCr/L。15~35mgCODCr/L,。0.5m3/h,3∶1。,CODCr40~60mg/L,BOD518~45mg/L。CBAF。2。2 NO-3—N2,CBAF。,,,,。,,,,,15~25mgCODCr/L。BOD5,5mg/L,。2.2 [9]。1[8]142   Vol.36 No.7 20100.62~1.44kgO2/d,Gs21~48m3/d,1∶1~3∶1。20mgCODCr/L,Q0.5m3/h,,2mm,45°。3,CBAF。3 DO3,3∶1,,。2.5mg/L,3.6mg/L;30cm,5.6mg/L,,6.6mg/L。2∶1,。2.4mg/L,3.5mg/L。30cm5.1mg/L,,5.6mg/L。1∶1,,0.4mg/L,。30cm,0.9mg/L,60cm4.5mg/L,,5.1mg/L。4、CBAF。4,。3∶1,;2∶1,91%;1∶1,80%,。2∶1。2.3 4 NH3—N,CBAF,CBAF。20mgCODCr/L,2∶1,2。2 /m3/h0.30.40.50.6/m3/(m2·h)681012  5、6,、,7,SS。5 NH3—N6 NO-3—N5、6,,,7,12m3/(m2·h),SS,SS Vol.36 No.7 2010143  7 SS,,CBAF,,,,。,,[4],CBAF10m3/(m2·h)。2.4 CBAFCBAF,、8、9。8 9 8、9,1~17.4mg/L,7~23mg/L,、。3 (1)CBAF、。(2),15~25mgCODCr/L,2∶1,10m3/(m2·h),CBAF。(3)CBAF,1~17.4mg/L,7~23mg/L,5mg/L,15mg/L,《》。参考文献1 ,..:,2005.582 Mendoza-EspinosaLG,StephensonT.Organicandhydraulicshockloadingsonabiologicalaeratedfilter.EnvironmentalTechnology,2001,22(3):321~3303 YooIK,KimDJ.EffectsofhydraulicbackwashloadoneffluentqualityofupflowBAF.JournalofEnvironmentalScienceandHealth,PartAToxic/HazardSubstancesandEnvironmentalEngineering,2001,36(4):575~5854 ,...2006,28(4):257~2605 ,,,..,2007,33(1):44~466 Mendoza-EspinosaLG,StephensonT.Areviewofbillogicalaeratedfilters(BAFs)forwastewatertreatment.EnvironmentEngineeringScience,1999,16(3):201~2067 WijeyekoonS,MinoT,SatohH,etal.Fixedbedbiologicalaeratedfiltrationforsecondaryeffluentpolishing-effectoffiltrationrateonnitrifyingbiologicalactivitydistribution.WaterScienceandTechnology,2000,41(1):187~1958 ,,..:,2002.90~969 ,,,..,1999,20(6):50~52  &:51800398:13480967800E-mail:yangyueww@126.com:2009-09-17:2010-04-26

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