改良型氧化沟工艺脱氮效果及特性参数的分析肖伟

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:2009-06-24:(1984-),,,,。:1673-9469(2009)04-0045-04肖伟1,李清雪1,吴伟2(1.,056038;2.,056002):通过对邯郸市某污水处理厂实际运行效果的监测分析,发现该厂改良型氧化沟工艺对氮的去除率较低,出水不能满足排放标准的要求。通过脱氮效果分析,研究了该氧化沟在正常运行条件下溶解氧、污泥浓度和流速的分布变化特征。结果表明,氧化沟脱氮效果欠佳的主要原因是溶解氧不足,无法形成好氧区域;污泥浓度过高直接消耗沟内大量溶解氧;流速不够严重影响了溶解氧的传递。因此,有效地控制污泥龄和加强沟内的混合推动力是提高脱氮能力的关键。:改良型氧化沟;脱氮;特性参数;硝化:X703        :AAnalysisoftheremovalofnitrogenandcharacteristicofoperationparametersbymodifiedoxidationditchprocessXIAOWei1,LIQing-xue1,WUWei2(1.CollegeofUrbanConstruction,HebeiUniversityofEngineering,HebeiHandan056038,China;2.HandanMunicipalWastewaterTreatmentCorporation,HebeiHandan056002,China)Abstract:BymonitoringtheoperationeffectsofawastewatertreatmentplantinHandan,itwasfoundthattheremovalrateofnitrogenwaslowandtheeffluentwaterwasnotuptothenationalstandardforwastewaterdischarge.Accordingtotheresultofthenitrogenremoval,theresearchanalyzedthedistribu-tionalvariationcharacteristicsofdissolvedoxygen(DO),mixedliquorsuspendedsolids(MLSS)andtheflowvelocityatnormalrunningconditions.Theresultsshowthattheleadingcauseofthebadnitrogenre-movalisthedeficiencyofDO,whichcannotformtheaerobicregion;highconcentrationsludgedirectlyreducestheconcentrationofdissolvedoxygenandlowflowvelocityaffectsthedeliveringofdissolvedoxy-gen.Therefore,controllingofsludgeageeffectivelyandstrengtheningthemixedimpetusarethekeystoimprovethenitrogenremoval.Keywords:modifiedoxidationditch;nitrogenremoval;characteristicparameters;nitrification  、,,,,[1]。,,SS,、。,,2003《》(GB18918-2002),、。、、,,。,。(),,,,26 4             (    )     Vol.26 No.4200912     Journal of Hebei University of Engineering(NaturalScienceEdition)     Dec.2009。110td,、、,55%。,,,8,8m,4m,624,、12。,。1。2,1。4,。,5(2),HACHHQ30d,ROYCEMODEL711,LS78,3,。1Tab.1AnalysismethodsofwaterqualitySSDR-2500BOD5HACHBOD5CODET3150B,2010TN-2010NH3-N2010TP201033.1,SS、BOD5、COD、TP,32008。,SS、BOD5、COD、TP、TNNH3-N11mg·L-1、14mg·L-1、30mg·L-1、0.29mg·L-1、32mg·L-113mg·L-1。SSBOD5(GB18918-2002)B,CODTPGB18918-2002A,TNNH3-NGB18918-2002。3.2、,4~10。4。1、25,34,。5,,。,1mg·L-1,0.5mg·L-1(6)。46        (    )200978。,0.5~2.0m,;2.0m2.5m,,。,,,,,[2]。9,v,、,0.1m·s-1,。10。,4:47,,。3.3,:(1)。,,[3]。,1NH3-NNO-3-N2,4.57gO2gNH3-N[4]。0.13~0.67mg·L-1,2mg·L-1,。,。[5](2)。,,,,,、[6]。,,,。6000~7000mg·L-1,7000mg·L-1,[7],,。(3)。,0.3~0.5m·s-1,0.12~0.27m·s-1。,,,。,,,、,。,,,。20064,,,2m。4,--,,。、,,;;,。,、,,,。:[1],,.[J].,2003,20(1):11-14.[2],,.[J].,2006,22(21):31-34.[3].[M].:,2006.[4].[M].:,2007.[5].VB12[J].,2008,29(3):242-245.[6],,,.[J].,2008,24(10):91-94.[7],.[J].,2003,19(12):94-96.( )48        (    )2009

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