PACMBR处理微污染地表水的中试研究

PAC/MBR胡婧逸1,邓慧萍1,张玉先1,黎园1,倪炯2,金国水2(1.同济大学长江水环境教育部重点实验室,上海200092;2.上虞市自来水公司,浙江上虞312300):采用投加粉末活性炭(PAC)的膜生物反应器(MBR)复合工艺PAC/MBR处理微污染地表水,考察了对浊度CODMn和氨氮的去除效果膜生物反应器的有效容积为4m3,采用聚偏氟乙烯平板膜,膜孔径为0.09~0.12m,总膜面积为85.2m2;MBR的进水流量为1200L/h,一次性投加PAC为1g/L,气水比为51;采用恒压操作间歇抽吸方式出水,操作压力为0.1MPa,抽停比为8min/2min中试结果表明,该工艺对沉淀池出水中浊度CODMn和氨氮的平均去除率分别为98%33%和53%,能抵抗水质和水温变化的冲击,有效保障出水水质在PAC/MBR系统中,PAC吸附生物降解和膜截留作用在去除不同分子质量有机物的过程中具有较好的互补性投加PAC有助于在膜表面形成稳定的生物活性炭动态膜,保证了恒定的出水流量:微污染地表水;粉末活性炭;膜生物反应器;分子质量;生物活性炭:TU991:A:1000-4602(2010)15-0023-05:(2008ZX07425-007)Pilot-scaleStudyonPAC/MBRforTreatmentofMicro-pollutedSurfaceWaterHUJing-yi1,DENGHu-iping1,ZHANGYu-xian1,LIYuan1,NIJiong2,JINGuo-shui2(1.KeyLaboratoryofYangtzeRiverAquaticEnvironmentMinistryofEducation,TongjiUniversity,Shanghai200092,China;2.ShangyuWaterSupplyCo.,Shangyu312300,China)Abstract:Thecombinedprocessofpowderedactivatedcarbonandmembranebioreactor(PAC/MBR)wasappliedfortreatmentofmicro-pollutedsurfacewater,andtheremovalefficienciesofturbid-ity,CODMnandammonianitrogenwereinvestigated.TheeffectivevolumeofMBRis4m3,andpolyviny-lidenefluoridemembranewithporediameterof0.09to0.12mandtotalareaof85.2m2wasused.Theoperationconditionsweretheinfluentrateof1200L/h,PACof1g/L,air/waterratioof51,effluentmodewithconstantpressureandintermittentpumping,pressureof0.1MPaandopen/stoptimeratioof8min/2min.Theresultsshowthattheaverageremoalratesofturbidity,CODMnandammonianitrogenintheeffluentfromsedimentationtankare98%,33%and53%respectively.Thecombinedprocesshasstrongresistancetochangeinwaterqualityandwatertemperature,soastoguaranteehighlyqualifiede-ffluen.tInPAC/MBRsystem,thereisanexcellentcomplementarityamongPACadsorption,biodegrada-tionandmembranerejectionforremovingorganicmatterswithdifferentmolecularweights.AddingPACcanfacilitatetheformationofastablebiologicalactivatedcarbondynamicmembrane,whichensuresthesystemtoproduceconstanteffluentflow.23第26卷第15期2010年8月中国给水排水CHINAWATER&WASTEWATERVo.l26No.15Aug.2010Keywords:micro-pollutedsurfacewater;powderedactivatedcarbon;membranebioreactor;molecularweigh;tbiologicalactivatedcarbon~,CODMn,CODMnPAC/MBR,(PAC)(MBR),PAC/MBR,PAC,,[1],,,1试验装置与方法111,,MBR,PAC,,1PAC/MBRFig.1FlowchartofPAC/MBRprocessMBR1800mm1200mm2400mm,4m3(PVDF),0.09~0.12m,1190mm508mm,71,85.2m2,12,CODMn,,PAC/MBR11Tab.1Qualityofrawwaterandeffluentfromsettlingtank/NTU35.1~387(132)5.92~27.4(15.9)CODMn/(mgL-1)4.5~8.7(5.95)1.56~2.40(1.91)UV254/cm-10.053~0.100(0.085)0.024~0.044(0.035)NH+4-N/(mgL-1)0.65~1.50(1.11)0.96~1.16(1.07)TN/(mgL-1)2.93~8.99(5.74)4.45~6.48(5.76)pH7.44~7.71(7.58)7.33~7.71(7.45):131011,32d,8.0~24.6,,50~80mg/L;MBR1200L/h,(200),,1g/L;51,6m3/h;,0.1MPa,8min/2min14Hach2100P,UV254,CODMn[2](MW)Mi-lliporeYM,301031ku,:0.45m,4,UV254,,2结果与讨论21211,,2524第26卷第15期中国给水排水:(k0)(k1)(k2),,k0,k1k2[3]:kiexp(0.005T)(i=12)(1)PAC/MBR,,PAC,3,PAC/MBR(2),2PAC/MBRFig.2CorrelationbetweenwatertemperatureandPAC/MBReffluentturbidity212PAC/MBRCODMn,CODMn1.91mg/L,;PAC/MBRCODMn1.85mg/L,1.28mg/L,33%(3)PAC/MBRUV2540.035cm-10.027cm-1,23.9%,UV2540.002cm-10.037cm-1,92%9.8%(4)UV254[3];UV254,CODMnKMnO4,[4]PAC,UV254;,[5],CODMn,UV254;,PAC,UV254,CODMn,CODMnPAC,12,,CODMn,,CODMn1.85mg/L3PAC/MBRCODMnFig.3CODMnremovalbyPAC/MBR4PAC/MBRUV254Fig.4UV254removalbyPAC/MBR213PAC/MBR50.96~1.16mg/L,PAC/MBR,0.51mg/L,53%1,,,PAC,25胡婧逸,等:PAC/MBR处理微污染地表水的中试研究第26卷第15期,[6],,,,,,,,,,20,(77%);12,,50%Head[7],20253010,58%71%82%,,0.5mg/L5PAC/MBRFig.5NH+4-NremovalbyPAC/MBR66PAC/MBRFig.6TransformationamongNH+4-N,NO-2-NandNO-3-NinPAC/MBR6,10~20,,,20,,,,,,PAC/MBR,6.6%,,;,22PAC/MBR(3)(30)(30),77PAC/MBRFig.7MolecularweightdistributionoforganicmattersinPAC/MBRinfluent,mixedliquidduringdifferentperiodsandPAC/MBReffluent7,PAC10ku,1~3ku,[8],1~10ku,MW1kuMW10ku,PAC,(BAC)[9],PAC,MW10kuPAC,,(EPS)MW1kuMW10ku[10],EPS26第26卷第15期中国给水排水[9],;,,,BAC,3结论PAC/MBRCODMn,98%33%53%,,,,PAC/MBR,PACMW10(1~10)10ku,BAC,,BACBAC,:[1],,,.MBR/PAC[J].,2009,25(5):59-62.[2].(4)[M].:,2002.[3],,,.IMBR[J].:,2004,20(3):211-214.[4],,,.-[J].,2007,1(4):61-64.[5],.[M].:,1999.[6],,,.MBR[J].,2005,21(9):43-45.[7]HeadMA,OleszkiewiczJA.Bioaugmentationfornitr-ificationatcoldtemperatures[J].WaterRes,2004,38(3):523-520.[8].[D].:,2006.[9],,.MBR[J].:,2007,37(2):350-354.[10]KuoWC,ParkinGF.Characterizationofsolublemicro-bialproductsfromanaerobictreatmentbymolecularweightdistributionandnicke-lchelatingproperties[J].WaterRes,1996,30(4):915-922.:(1986-),,,,E-mail:[e-mail]:2010-01-0427胡婧逸,等:PAC/MBR处理微污染地表水的中试研究第26卷第15期