中国给水排水-2008年第21期

论述与研究基于有机物分子质量分布的饮用水处理工艺选择李勇1,张晓健1,陈超1,戴吉胜2,许欢2,张晓慧3,朱晓辉3(1.清华大学环境科学与工程系,北京100084;2.东莞市东江水务有限公司,广东东莞523112;3.兰州交通大学环境与市政工程学院,甘肃兰州730070)摘要:为应对市内运河排洪造成的出水有机物超标问题,建立了臭氧/活性炭中试装置,采用滤膜法测试了运河水、现有水厂各工艺段及臭氧/活性炭出水中有机物的分子质量分布,在此基础上对现有水处理工艺进行了评价。结果表明,由于原水受到工业污染,其大分子有机物含量较高,并且亲水性强而易被氧化,造成混凝沉淀的去除效果不好,而运河水中的溶解性小分子有机物含量较高,也不易被混凝沉淀去除,采用臭氧/活性炭深度处理工艺是一个很好的选择。臭氧和活性炭联用提高对有机物去除效果的原因在于,臭氧能有效地氧化大分子有机物为小分子有机物,有利于活性炭的吸附、降解去除。关键词:饮用水;排洪;有机物;分子质量分布;工艺选择中图分类号:TU991.21文献标识码:A文章编号:1000-4602(2008)21-0001-04基金项目:国家自然科学基金资助项目(50778097);国家科技支撑计划项目(2007BAC26B03)SelectionofDrinkingWaterTreatmentProcessBasedonMolecularWeightDistributionofOrganicMattersLIYong1,ZHANGXiao2jian1,CHENChao1,DAIJi2sheng2,XUHuan2,ZHANGXiao2hui3,ZHUXiao2hui3(1.DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity,Beijing100084,China;2.DongjiangWaterAffairsCo.Ltd.,Dongguan523112,China;3.SchoolofEnvironmentalandMunicipalEngineering,LanzhouJiaotongUniversity,Lanzhou730070,China)Abstract:Inordertosolvetheproblemthattheorganicmattersintheeffluentexceedthestandardduetoflooddischargefromurbancana,lthepilotplantofozone/activatedcarbonwassetup.Themolec2ularweightdistributions(MWD)oforganicmattersinthecanalwatersample,thedifferentexistingprocesseffluentsandtheozone/activatedcarboneffluentweremeasuredusingmembranefiltrationmeth2od,andthedifferenttreatmentprocesseswereevaluated.Theresultsshowthatcontaminatedbyindustry,therawwaterhashigh2concentrationorganicmatterswithhighmolecularweigh,twhichcannotbere2movedbycoagulationandsedimentationduetotheirstronghydrophilicandoxidablecharacteristics.Fur2thermore,thehigh2concentrationdissolvedorganicmatterswithlowmolecularweightinthecanalwatercannotalsoberemovedbycoagulationandsedimentation.Therefore,theozone/activatedcarbonprocessisagoodchoice.Thereasonofenhancedremovaloforganicmattersbyozone/activatedcarbonisthatthe#1#第24卷第21期2008年11月中国给水排水CHINAWATER&WASTEWATERVo.l24No.21Nov.2008