原水及沉后水对PAC-UF工艺膜污染的影响

书第46卷第2期2014年2月哈尔滨工业大学学报JOUＲNALOFHAＲBININSTITUTEOFTECHNOLOGYVol.46No.2Feb．2014原水及沉后水对PAC/UF工艺膜污染的影响刘永旺1，李星1，杨艳玲1，安东子2，任家炜1，周志伟1，贾瑞宝3，宋武昌3(1．北京工业大学建筑工程学院，100124北京;2．北京首钢国际工程技术有限公司，100043北京;3．济南市供排水监测中心，250021济南)摘要:为考察超滤过程膜污染的主要影响因素，采用模拟粉末活性炭－超滤(PAC/UF)工艺处理微污染原水及其沉后水，对比两种水体膜污染特性差异，分析颗粒物粒径和溶解性有机物特性对膜污染的影响．结果表明，PAC/UF工艺能够有效减轻沉后水超滤过程膜污染，但对原水超滤过程没有改善效果．原水以中小分子亲水性有机物为主，PAC可有效去除其中芳香类和溶解性微生物代谢产物，但没有减轻膜污染，这些有机物不是造成原水膜污染的主要因素．胶体颗粒粒径小、含量高是导致PAC/UF工艺无法减轻原水膜污染的主要原因，颗粒含量及粒径分布对膜污染有重要影响．关键词:超滤;粉末活性炭;颗粒物;有机物;膜污染中图分类号:TU991文献标志码:A文章编号:0367－6234(2014)02－0098－06EffectofrawwaterandsedimentationeffluentonfoulingcontrolofPAC/UFintegratedprocessLIUYongwang1，LIXing1，YANGYanling1，ANDongzi2，ＲENJiawei1，ZHOUZhiwei1，JIAＲuibao3，SONGWuchang3(1．CollegeofArchitectureandCivilEngineering，BeijingUniversityofTechnology，100124Beijing，China;2．BeijingShougangInternationalEngineeringTechnologyCo．，Ltd．，100043Beijing，China;3．Ji’nanWater＆WastewaterMonitoringCent，250021Ji’nan，China)Abstract:Toinvestigatethemainfactorthatinfluencedmembranefoulinginultrafiltration，asimulatedprocessofpowderedactivatedcarbonandultrafiltration(PAC/UF)wasusedtotreatmicro－pollutedrawwaterandthesedimentationeffluent．Membranefoulingcharacteristicsoftwosamples，effectofparticlesizeanddissolvedorganicmatteronmembranefoulingwereinvestigated．TheresultsindicatedthatPAC/UFprocesscouldmitigatethemembranefoulingofthesedimentationeffluent，butitcouldnotalleviatethemembranefoulingofrawwater．Organicsintherawwaterweremostlyhydrophilicorganic－basedsmallmolecules，anditcouldnotmitigatethemembranefoulingoftherawwateralthoughthearomaticityandthedissolvedmicrobiologicalproductswerereducedwiththeadsorptionofPACparticles，whichindicatedthattheadsorbedorganicdidnotcauseseriousmembranefoulingintherawwater．Theparticlesinrawwater，withasmallparticlesizeandhighnumber，wasthoughttobethemainfactorthatleadingtotheinvalidfoulingcontrolfunctionofPAC/UFprocessonrawwater．Particlenumberandparticlesizedistributionhaveacriticalroleinmembranefouling．Keywords:ultrafiltration;pow