作　　者： ; ; ; ;

机构地区： 清华大学环境学院

出　　处： 《中国农村水利水电》 2010年第6期50-53,共4页

摘　　要： 近年来,超滤技术已经成为全球饮用水处理领域研究的热点,同时也为其应用于农村饮水安全工程提供了很好的选择。选取浸没式聚偏氟乙烯(PVDF)中空纤维超滤膜作为过滤材料,分别以高岭土、腐殖酸配水模拟农村地表水源中季节性的浊度、天然有机物(NOM)污染,研究了中空纤维超滤膜的处理效果及膜污染特性。结果表明,浸没式超滤膜对原水浊度有较高的耐受负荷,直接超滤时出水有机物浓度与进水有机物浓度成正比,且跨膜压差随进水有机物浓度的增加呈指数增长,投加混凝剂可以延缓膜污染进程,混凝-超滤出水水质符合国家饮用水卫生标准要求。浸没式中空纤维超滤膜适用于农村饮水安全工程。 Ultrafiltration process applied to water treatment has become a more attractive technology worldwide to produce potable water in recent years.It provides a good choice for rural drinking water safety project.Polyvinylidene fluoride（PVDF）membrane is used as filtration material.Kaolinite solution and humic acid solution is made to simulate seasonal turbidity and natural organic matter（NOM） pollutants in rural surface water in the experimental study.The removal effect of turbidity and natural organic matter（NOM） by hollow-fiber ultrafiltration membrane is studied.The changes of trans-membrane pressure and membrane specific flux are observed.Immersed hollow-fiber ultrafiltration membrane is found to have a high endurance to turbidity.Membrane fouling can be postponed by coagulant.There is a linear relationship between TOC of influent and permeate water and an exponential relationship between the TOC of influent and TMP increase rate during UF.The quality of filtrated water by coagulation-UF meets the demand of the national drinking water standard.Immersed hollow-fiber ultrafiltration membrane is fit to be used in rural drinking water safety projects to improve drinking water quality.

关 键 词： 农村饮水安全 膜技术 超滤 膜污染

领　　域： [建筑科学]