PAC-MBR处理微污染地表水的中试研究

PAC/MBR处理微污染地表水的中试研究胡婧逸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)��摘�要:�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0.09~0.12�m,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5�1;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。��关键词:�微污染地表水;�粉末活性炭;�膜生物反应器;�分子质量;�生物活性炭中图分类号:TU991��文献标识码:A��文章编号:1000-4602(2010)15-0023-05��基金项目:国家水体污染控制与治理科技重大专项(2008ZX07425-007)Pilot-scaleStudyonPAC/MBRforTreatmentofMicro-pollutedSurfaceWaterHUJing-yi1,�DENGHu-iping1,�ZHANGYu-xian1,�LIYuan1,�NIJiong2,�JINGuo-shui2(1.KeyLaboratoryofYangtzeRiverAquaticEnvironment,TongjiUniversity,Shanghai200092,China;2.ShangyuWaterSupplyCo.,Shangyu312300,China)��Abstract:�Thecombinedprocessofpowderedactivatedcarbonandmembranebioreactor(PAC/MBR)wasappliedfortreatmentofmicro-pollutedsurfacewater,andtheremovalefficienciesofturbid-ity,CODMnandammonianitrogenwereinvestigated.TheeffectivevolumeofMBRis4m3,andpolyviny-lidenefluoridemembranewithporediameterof0.09to0.12�mandtotalareaof85.2m2wasused.Theoperationconditionsweretheinfluentrateof1200L/h,PACof1g/L,air/waterratioof5�1,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������