沸石床多级生物膜系统处理焦化废水的研究赵文涛

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25℃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,start-up,pollutantsremovalandfunctionzonesofthesystemwereinvestigated.Theresultsindicatethattheadsorptionofammonianitrogenbyzeo-litemediafollowstheLangmuiradsorptionisothermequation,withmaximumadsorptioncapacityof0.318mg/gat25℃.Thestart-uptimeofthesystemisabout40days,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.·18·24　1320087　　　　　　　　　　　　CHINAWATERWASTEWATER　　　　　　　　　　　　　Vol.24No.13Jul.2008　　Keywords:　cokingwastewater;　zeolite;　multistagebiofilmsystem　　、、NH3-N[1、2],,[3],NH3-N。P.Chudoba,,,[4]。KazuhikoNoto,,[5]。,[6～10]。,,,COD。1　试验材料与方法1.1　1。1　Fig.1　Schematicdiagramofzeolitebedmultistagebiofilmsystem,4,10.6L,84.8L。,3～5cm,2248kg/m3,944kg/m3,42.0%。A1/A2/O1/O2/O3/O4/O5/O6(A1、A2,O1～O6),。(HRT)40h,27～33℃,DO2～6mg/L。,pH7.0～7.5。1.2　COD、NH3-N、NO-3-N,[11]。1.3　3～5cm,,105℃6h,。NH3-N5.2、19、41、56、77、94、116mg/LNH4Cl500mL1L,102g,25℃(100r/min)8h,NH3-N。1.4　,。,NH3-N600mg/LNH4Cl,NH3-N。,3L,,7d、,12d,。2　结果和讨论2.1　NH3-NLangmuirNH3-N,2。2　NH3-NLangmuirFig.2　LangmuirisothermofzeoliteforNH3-Nadsorption:·19·:24　13　q=0.139×0.318Ce1+0.139Ce(1),NH3-NLangmuir,。0.318mg/g,,[12]。2.2　3、NH3-NNO-3-N(NO-3-N,)。3　NH3-N、NO-3-NFig.3　DurationcurveofNH3-NandNO-3-Nduringstart-upstage、,2dNO-3-N,NH3-N,。NO-3-N,。6dNH3-N,NH3-N120mg/L,NH3-N15mg/L,4.3mg/L,95%。,,7d3d。12,NO-3-N。,NH3-N250mg/L,NH3-N;,,,。4、COD。4,COD,30d,。,40d。45～60,COD1030mg/L,203mg/L,80.3%。4　、CODFig.4　DurationcurveofCODduringstart-upstage2.3　,NH3-N、CODNH3-N、COD5、6。5　NH3-NNH3-NFig.5　RelationshipofinfluentNH3-NloadingwithNH3-NremovalefficiencyandNH3-Nremovalloading5,NH3-N≤0.10kg/(m3·d),NH3-N15mg/L,(GB8978—1996),NH3-N;·20·24　13　　　　　　　　　　　　　　　　　　　　　　　　　　(m3·d),NH3-N15mg/L。6　CODCODFig.6　RelationshipofinfluentCODloadingwithCODremovalefficiencyandCODremovalloading6,COD,COD90.2%,COD。NH3-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,COD。2.4　,CODNH3-N78。7,COD,246、262,O1O2COD74.4%74.5%,COD(C)。COD,。(175),CO1、O2、O3,COD78.5%。COD,,C。,,。,,,,COD。7　CODFig.7　CODreductionalongreactorcells8　NH3-NFig.8　NH3-NreductionalongreactorcellsNH3-N,CCOD(175O3、246O1、262O2),NH3-N,。CNH3-N,175O4、O5246O3、O4NH3-N80.1%、87.9%,(N)。C;,,,·21·:24　13,。C,C,。COD,COD,/(C/N)。3　结论①　25℃NH3-NLangmuir,0.318mg/g。②　40d,7d,3d,30d。③　,NH3-N≤0.10kg/(m3·d),NH3-NCOD(2.4±1.2)mg/L(134±34)mg/L,98.1%85.8%,NH3-N,COD。④　:C、C/NN。CCOD,;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].WaterSciTechnol,1998,38(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-Chul,ShinbHang-Sik,etal.Enhancedammonianitrogenremovalusingconsist-entbiologicalregenerationandammoniumexchangeofzeoliteinmodifiedSBRprocess[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].WaterSciTechnol,2000,42(5):127-134.[11]　.(4)[M].:,2002.[12]　GurdeepSingh,BablyPrasad.Removalofammoniafro