沸石床多级生物膜系统处理焦化废水的研究

赵文涛1,2,黄霞1,2,何苗1,2,张彭义1,2,左晨燕1,2(1.清华大学环境科学与工程系,北京100084;2.清华大学环境模拟与污染控制国家重点联合实验室,北京100084):采用沸石床多级生物膜系统处理焦化废水,考察了沸石填料对NH3-N的吸附特性以及系统的启动性能去除效果和功能分区结果表明,在25e时,沸石填料对NH3-N的吸附符合Langmuir等温式,极限吸附容量为0.318mg/g;系统启动时间约为40d,其中挂膜为7d,硝化菌驯化为3d,异养菌驯化为30d;稳定运行条件下,当系统进水NH3-N负荷[0.10kg/(m3#d)时,出水NH3-N和COD平均浓度分别为(2.4?1.2)mg/L和(134?34)mg/L,平均去除率分别为98.1%和85.8%,NH3-N达到了国家一级排放标准,COD达到了国家二级排放标准;系统的好氧段出现了三个功能区,即以去除COD为主的C区同时去除COD和NH3-N的C/N区及以去除NH3-N为主的N区:焦化废水;沸石;多级生物膜系统:X703.1:A:1000-4602(2008)13-0018-05:(50725827)StudyonZeoliteBedMultistageBiofilmSystemforTreatmentofCokingWastewaterZHAOWen-tao1,2,HUANGXia1,2,HEMiao1,2,ZHANGPeng-yi1,2,ZUOChen-yan1,2(1.DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity,Beijing100084,China;2.StateKeyJointLaboratoryofEnvironmentalSimulationandPollutionControl,TsinghuaUniversity,Beijing100084,China)Abstract:Thezeolitebedmultistagebiofilmsystemwasusedtotreatcokingwastewater.Thead-sorptioncharacteristicsofammonianitrogenbyzeolitemedia,star-tup,pollutantsremovalandfunctionzonesofthesystemwereinvestigated.Theresultsindicatethattheadsorptionofammonianitrogenbyzeo-litemediafollowstheLangmuiradsorptionisothermequation,withmaximumadsorptioncapacityof0.318mg/gat25e.Thestar-tuptimeofthesystemisabout40days,consistingof7daysforbiofilmforma-tion,3daysfornitrobacteriadomesticationand30daysforheterotrophicbacteriadomestication.WhentheNH3-Nloadinginthesysteminfluentislessthanorequalto0.10kg/(m3#d),theaverageefflu-entNH3-NandCODconcentrationsare(2.4?1.2)mg/Land(134?34)mg/Lwithaverageremovalratesof98.1%and85.8%,respectively.TheNH3-Nmeetsthenationalfirstclassdischargestandard,andtheCODmeetsthenationalsecondclassdischargestandard.Threedifferentpollutantremovalfunc-tionzones,namedasdecarbonizationzone,decarbonization/nitrificationzoneandnitrificationzoneexistinaerobicstage.#18#241320087CHINAWATER&WASTEWATERVo.l24No.13Ju.l2008转载[12],,[3],NH3-NP.Chudoba,,,[4]KazuhikoNoto,,[5],[6~10],,,COD1试验材料与方法11111Fig.1Schematicdiagramofzeolitebedmultistagebiofilmsystem,4,10.6L,84.8L,3~5cm,2248kg/m3,944kg/m3,42.0%A1/A2/O1/O2/O3/O4/O5/O6(A1A2,O1~O6),(HRT)40h,27~33e,DO2~6mg/L,pH7.0~7.5112CODNH3-NNO-3-N,[11]1133~5cm,,105e6h,NH3-N5.21941567794116mg/LNH4Cl500mL1L,102g,25e(100r/min)8h,NH3-N114,,NH3-N600mg/LNH4Cl,NH3-N,3L,,7d,12d,2结果和讨论211NH3-NLangmuirNH3-N,22NH3-NLangmuirFig.2LangmuirisothermofzeoliteforNH3-Nadsorption:#19#:2413中国科技论文在线=0.139@0.318Ce1+0.139Ce(1),NH3-NLangmuir,0.318mg/g,,[12]2123NH3-NNO-3-N(NO-3-N,)3NH3-NNO-3-NFig.3DurationcurveofNH3-NandNO-3-Nduringstart-upstage,2dNO-3-N,NH3-N,NO-3-N,6dNH3-N,NH3-N120mg/L,NH3-N15mg/L,4.3mg/L,95%,,7d3d12,NO-3-N,NH3-N250mg/L,NH3-N;,,,4COD4,COD,30d,,40d45~60,COD1030mg/L,203mg/L,80.3%4CODFig.4DurationcurveofCODduringstart-upstage213,NH3-NCODNH3-NCOD565NH3-NNH3-NFig.5RelationshipofinfluentNH3-NloadingwithNH3-NremovalefficiencyandNH3-Nremovalloading5,NH3-N[0.10kg/(m3#d),NH3-N15mg/L,(GB8978)1996),NH3-N;#20#2413(m3#d),NH3-N15mg/L6CODCODFig.6RelationshipofinfluentCODloadingwithCODremovalefficiencyandCODremovalloading6,COD,COD90.2%,CODNH3-N15mg/L,NH3-N[0.10kg/(m3#d),NH3-NCOD(2.4?1.2)mg/L(134?34)mg/L,98.1%85.8%,NH3-N,COD214,CODNH3-N787,COD,246262,O1O2COD74.4%74.5%,COD(C)COD,(175),CO1O2O3,COD78.5%COD,,C,,,,,,COD7CODFig.7CODreductionalongreactorcells8NH3-NFig.8NH3-NreductionalongreactorcellsNH3-N,CCOD(175O3246O1262O2),NH3-N,CNH3-N,175O4O5246O3O4NH3-N80.1%87.9%,(N)C;,,,#21#:2413中国科技论文在线(C/N)3结论¹25eNH3-NLangmuir,0.318mg/gº40d,7d,3d,30d»,NH3-N[0.10kg/(m3#d),NH3-NCOD(2.4?1.2)mg/L(134?34)mg/L,98.1%85.8%,NH3-N,COD¼:CC/NNCCOD,;C/NCOD,NH3-N,;NCOD,NH3-N,:[1]ZhangM,TayJH,QianY,etal.CokeplantwastewatertreatmentbyfixedbiofilmsystemforCODandNH3-Nremoval[J].WaterRes,1998,32(2):519-527.[2],,,.[J].,1997,13(1):14-17.[3],,,.[J].,2006,22(21):71-73.[4]ChudobaP,PujolR.Athree-stagebiofiltrationprocess:performancesofapilotplant[J].WaterSciTechno,l1998,38(8-9):257-265.[5]KazuhikoNoto,TakakoOgasawara,YuichiSuwa,etal.Completeoxidationofhighconcentrationofammoniabyretainingincompatiblenitrificationactivitiesinthree-vesselsystem[J].WaterRes,1998,32(3):769-773.[6]ChangWon-Seok,HongSeok-Won,ParkJoonkyu.Effectofzeolitemediaforthetreatmentoftextilewastewaterinabiologicalaeratedfilter[J].ProcessBiochem,2002,37(7):693-698.[7]JungaJin-Young,ChungYun-Chu,lShinbHang-Sik,etal.Enhancedammonianitrogenremovalusingconsis-tentbiologicalregenerationandammoniumexchangeofzeoliteinmodifiedSBRprocess[J].WaterRes,2004,38(2):347-354.[8],,.[J].,2006,22(9):73-77.[9],,,.[J].,2006,22(23):47-51.[10]ChungYC,SonDH,AhnDH.Nitrogenandorganicsremovalfromindustrialwastewaterusingnaturalzeolitemedia[J].WaterSciTechno,l2000,42(5):127-134.[11].(4)[M].:,2002.[12]GurdeepSingh,BablyPrasad.Removalofammoniafromcoke-plantwastewaterbyusingsystheticzeolite[J].WaterEnvironRes,1997,69(2):157-161.:(1979-),,,