氨氮浓度对活性炭深度处理工艺选择的影响孙光远

孙光远1,　孙　巍2(1.湖南城建职业技术学院设备工程系,湖南湘潭411101;2.湖南城建职业技术学院机电工程系,湖南湘潭411101)　　　:　以北江佛山段原水为处理对象,比较了活性炭吸附(GAC)和臭氧/生物活性炭(O3/BAC)两种深度处理工艺对氨氮的去除效果,并分析了预氯化对其处理效果的影响。结果表明,GAC和O3/BAC工艺均具有一定的耐氨氮冲击负荷能力。低氨氮浓度下,GAC和O3/BAC工艺对氨氮的去除率接近(约40%),并随着进水氨氮浓度的增大而增加;两者出水中的CHCl3浓度均超标,但O3/BAC的较低;综合考虑处理效果及成本,建议此时优先采用GAC工艺。高氨氮浓度下,O3/BAC工艺去除氨氮的效果显著优于GAC,经消毒后其出水中的CHCl3浓度也低于GAC的,故建议在该种原水水质下优先采用O3/BAC工艺。控制沉淀池出水余氯在合适的范围内,则预氯化对O3/BAC工艺的除污效果无影响。　　:　给水深度处理;　活性炭吸附;　臭氧/生物活性炭;　氨氮:TU991.2　　:C　　:1000-4602(2007)17-0106-03InfluenceofAmmoniaNitrogenConcentrationonSelectionofAdvancedTreatmentProcesswithActivatedCarbonSUNGuang-yuan1,　SUNWei2(1.DepartmentofEquipmentEngineering,HunanUrbanConstructionCollege,Xiangtan411101,China;2.DepartmentofMechanicalEngineering,HunanUrbanConstructionCollege,Xiangtan411101,China)　　Abstract:　Inthepilot-scaleexperimentsofadvancedtreatmentofrawwaterfromFoshansectionofNorthPearlRiver,theremovalefficiencyofammonianitrogenbygranularactivatedcarbon(GAC)ad-sorptionprocessandozone/biologicalactivatedcarbon(O3/BAC)processwascompared,andtheeffectofpre-chlorinationontheadvancedtreatmentefficiencywasanalyzed.TheresultsshowthatbothGACandO3/BACprocesshavesomeabilityinresistingammonianitrogenshockloading.Underthelowcon-centrationofammonianitrogen,theaverageremovalefficiencyofGACandO3/BACprocessesisnearlythesame(about40%),andtheremovalrateriseswiththeincreasingofinfluentammonianitrogencon-centration.TheCHCl3concentrationintheeffluentofGACandO3/BACprocessesgoesbeyondthestandard,buttheCHCl3concentrationinO3/BACprocessislowerthanthatinGACprocess.Conside-ringthetreatmentefficiencyandcost,GACprocessistakenprecedenceofO3/BAC.Underthehighcon-centrationofammonianitrogen,theremovalefficiencyofO3/BACprocessishigherthanthatofGACob-viously.TheCHCl3concentrationinthedisinfectedeffluentofO3/BACprocessisalsolowerthanthatinGACprocess.Inthiscase,usingtheO3/BACprocessisbetter.Whentheresidualchlorineconcentra-tionintheeffluentofthesettlingtankiscontrolledwithinasuitablerange,thepre-chlorinationhasnoin-fluenceonO3/BACprocess.·106·第23卷　第17期2007年9月　　　　　　　　　　　　中国给水排水CHINAWATERWASTEWATER　　　　　　　　　　　　　Vol.23No.17Sep.2007　　Keywords:　advancedwatertreatment;　activatedcarbonadsorption;　ozone/biologicalactiva-tedcarbon;　ammonianitrogen　　。,,。,。(GAC)/(O3/BAC),、,,。1　试验装置与方法1.1　1。1　Tab.1　Rawwaterquality/NTUCODMn/(mg·L-1)BOD5/(mg·L-1)COD/(mg·L-1)TOC/(mg·L-1)DO/(mg·L-1)/(mg·L-1)NO-2-N/(mg·L-1)1.3～48.2Ⅰ1.38～2.780.03～25～263.41～6.575.9～8.90.02～0.490.07～0.18　　1,。,。1.2　,5m3/h,GACO3/BAC2.5m3/h。GACBAC4.2m,510mm×510mm,ZJ-15,900mg/g,150mg/g,1.5mm,2m。0.42m3,2,0.097m3,150mm,6m,5.5m;0.35m3,300mm,5.5m,5.0m;O3,。O3GSO20,,。。1。1　Fig.1　Flowchartofpilot-scaleexperiment2　结果与讨论2.1　2。2　GACO3/BACTab.2　RemovalefficiencyoflowconcentrationNH3-NbyGACandO3/BACwithoutprechlorinationNH3-N/(mg·L-1)0.330.50.340.310.180.19GAC/%57.67055.948.416.726.3BAC/%60.67455.951.616.715.8　　2,0.5mg/L,O3/BAC。BAC,。,,,;,,BAC。GACO3/BAC(40%),GAC。0.2mg/L,GACO3/BAC,NO-2-N、NO-3-N0.189、1.890.16mg/L,《》(GB5749—2006)。,、。BAC,,≤0.1mg/L。:,O3/BAC·107·孙光远,等:氨氮浓度对活性炭深度处理工艺选择的影响第23卷　第17期(3),。3　、BACTab.3　Comparisonofremovalefficiencieswithandwithoutprechlorination%15.7～7420～74.07　　,O3/BACCODMn72.1%,,BAC。　　,GAC0.23NTU,CODMn65%,CHCl3,CHCl3,GAC,,。GACCHCl3CHCl3,CHCl3,GACCHCl3,CHCl3,CHCl3[1]。O3/BAC,,,CHCl3。,,,CHCl3。,,,,GAC。2.2　GAC、O3/BAC,,4。　　4,GACO3/BAC,0.60mg/L。O3/BACGAC,DO,。O3/BACGACCODMn。GACCHCl3O3/BAC3～5,O3/BACGAC。,,O3/BAC。4　GACO3/BACTab.4　RemovalefficienciesofhighconcentrationNH3-NbyGACandO3/BACwithoutprechlorinationNH3-N/(mg·L-1)1.871.440.950.570.660.790.620.60GAC/%30.529.930.176.331.828.929.012.0BAC/%49.448.646.79642.445.693.576.73　结论①　GACO3/BAC。②　,GACO3/BAC,。GAC,GAC。③　,O3/BACGAC,。CHCl3GAC,O3/BAC。④　,O3/BAC,。:[1]　,.[M].:,2002.:13187322891E-mail:[e-mail]:2007-03-20·108·第23卷　第17期　　　　　　　　　　　　　　中国给水排水