通用水处理公司在巴黎郊区运营着三家大型饮用水处理厂，总处理能力为180万m3/d。一个将这些最小的工厂的处理能力翻一番的项目已促使该公司研究创新的处理方法。选择纳滤。经过初步研究，一个原型建成并上线；自1993年2月以来，纳米过滤水已被分配到一个6000人的小社区，名为Auvers sur Oise。在本案例研究中，将介绍Mery sur Oise常规工厂和纳滤原型，并简要讨论Auvers sur Oise网络上的实验方案。

Compagnie Generale des Eaux operates three large drinking water treatment plants in the Paris suburb, with a combined capacity of 1,800,000 m3/d. A project to double the capacity of the smallest of these plants at Mery-sur-Oise has lead the company to investigate innovative treatment methods. Nanofiltration was chosen. After pilot studies a prototype was built and came on line; since February 1993 nanofiltered water has been distributed to a small community of 6,000 called Auvers-sur-Oise. In this case study, both the Mery-sur-Oise conventional plant and the nanofiltration prototype will be described and the experimental programme on the Auvers-sur-Oise network will be briefly discussed.