超滤膜在饮用水处理中临界通量的影响因素研究_齐鲁
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工业用水与废水INDUSTRIALWATER&WASTEWATERVol.42No.6Dec.,2011超滤膜在饮用水处理中临界通量的影响因素研究齐鲁1,王洪臣1,郑祥1,程荣1,陈清2,陈杰2,梁恒3,李圭白3(1.中国人民大学环境学院,北京100872;2.苏州立升膜分离科技有限公司,江苏苏州215012;3.哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090)膜污染与膜通量有关[1-3]。一般膜通量愈高,不仅能耗愈高,膜污染也愈迅速,需采用频繁的物摘要:超滤膜在临界通量以下过滤可不产生膜污染或产生极轻的膜污染,针对超滤膜在饮用水处理中的临界通量的影响因素,系统考察曝气、过滤方式和混凝沉淀预处理等对浸没式超滤膜处理松花江水临界通量的影响。结果表明,曝气强度达到10m3/(m2·h),连续曝气可将超滤膜的临界通量提高5L/(m2·h),曝气强度达到40m3/(m2·h),间歇曝气可将超滤膜的临界通量提高5L/(m2·h),但曝气强度再增大不会继续提高临界通量;间歇过滤不能提高超滤膜的临界通量,曝气强度为40m3/(m2·h)时,间歇过滤间歇曝气可将其临界通量提高5L/(m2·h);混凝沉淀预处理可将超滤膜的临界通量提高10L/(m2·h)、混凝-连续曝气和混凝-间歇过滤间歇曝气可将临界通量提高15L/(m2·h)。关键词:超滤膜;临界通量;曝气;过滤方式;预处理;膜污染中图分类号:TU991.24文献标识码:A文章编号:%1009-2455(2011)06-0010-05FactorsaffectingcriticalfluxofultrafiltrationmembraneindrinkingwatertreatmentQILu1,WANGHong-chen1,ZHENGXiang1,CHENGRong1,CHENQing2,CHENJie2,LIANGHeng3,LIGui-bai3(1.SchoolofEnvironmentandNaturalResource,RenminUniversityofChina,Beijing100872,China;2.SuzhouLitreeMembraneSeparationTechnologyCo.,Ltd.,Suzhou215012,China;3.StateKeyLaboratoryofUrbanWaterResourceandEnvironment,HarbinInstituteofTechnology,Harbin150090,China)Abstract:Nofoulingorverylittlefoulingwouldbecausedbythefiltrationofultrafiltrationmembraneunderthecriticalflux.Accordingtothefactorsaffectingthecriticalfluxofultrafiltrationmembraneindrinkingwatertreatment,theeffectsofaeration,filtrationmode,coagulationsedimentationpretreatmentandsomeotherfactorsonthecriticalfluxofthesubmergedultrafiltrationmembraneintreatmentofwaterfromSonghuaRiverwereinvestigated.Theresultsshowedthat,criticalfluxcouldbeenhancedby5L/(m2·h)undercontinuousaerationwiththeintensityof10m3/(m2·h),andthesameeffectcouldalsobeobtainedunderintermittentaerationwiththeintensityof40m3/(m2·h),however,afterthat,thecriticalfluxcouldnolongerbeincreasedbyincreasingaerationintensity.Intermittentfiltrationhadnopositiveeffectoncriticalflux,whentheaerationintensitywas40m3/(m2·h),intermittentfiltrationwithintermittentaerationcouldenhancethecriticalfluxby5L/(m2·h).Criticalfluxcouldbeenhancedby10L/(m2·h)whenusingcoagulat
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