Dow Water & Process Solutions, Tarragona, Dow Ibérica, Carretera de Salou s/n, 43006 Tarragona, Spain.
Water Sci Technol. 2011;64(1):228-32. doi: 10.2166/wst.2011.583.
Nanofiltration (NF) is an attractive technology for potable and industrial water treatment because NF operates between ultrafiltration (UF) and reverse osmosis (RO) membranes. NF is designed to remove a high percentage of organic contaminants (humic acids, pesticides, color bodies) while passing a medium to high percentage of salt. Compared to UF membranes, the NF product water quality is significantly better; compared to comparable RO treatment systems NF systems require lower operating pressures. Due to these features, NF is increasingly used in a broad range of water treatment applications. The general applications include softening, as well as color, organics and micro-organism removal. DOW FILMTEC NF270-400 is one the most frequently used elements in water treatment and this paper presents examples of three recent NF270-400 installations in Europe. The first two plants, Eupen and Stembert, are located in Belgium and produce potable water from surface water. The third one is a Scandinavian plant which purifies groundwater for a brewery and soft drink production. The presented operation results prove NF to be a highly competitive technique for low cost water treatment.
纳滤（NF）是一种有吸引力的饮用水和工业水处理技术，因为 NF 介于超滤（UF）和反渗透（RO）膜之间运行。NF 的设计目的是在传递中等至高比例盐的同时去除高比例的有机污染物（腐殖酸、农药、色体）。与 UF 膜相比，NF 的产品水质显著更好；与可比的 RO 处理系统相比，NF 系统需要更低的操作压力。由于这些特点，NF 在广泛的水处理应用中得到了越来越多的应用。一般应用包括软化，以及去除颜色、有机物和微生物。陶氏 FILMTEC NF270-400 是水处理中最常用的元件之一，本文介绍了欧洲最近三个 NF270-400 装置的实例。前两个工厂，Eupen 和 Stembert，位于比利时，从地表水生产饮用水。第三个是斯堪的纳维亚的一个工厂，为啤酒厂和软饮料生产净化地下水。所呈现的运行结果证明 NF 是一种具有成本效益的水处理技术。
