1999年秋天，在Mery sur OiseWater处理厂引入了纳滤（NF），作为絮凝、臭氧氧化和双介质过滤下游的额外精制步骤。该工厂为一个分配系统供水，该系统向法国巴黎北郊的31个城市供水。选择NF 200膜是因为它们能够去除天然有机物和阿特拉津。该处理厂80%的水经过纳米过滤，其余的水经过生物处理。全面数据的结果表明，新处理改善了分布式水质，与安装NF之前相同季节的结果相比，工厂出口的总有机碳低于1 mgC/L，细菌总数减少49%，三卤甲烷减少50%。 包括17个参考文献、表格、图表。

In the autumn of 1999, nanofiltration (NF) was introduced in the Mery-sur-OiseWater Treatment Plant as an additional refining step downstream fromflocculation, ozonation, and dual media filtration. This plant feeds adistribution system that supplies water to 31 cities in the northern suburbs ofParis, France. NF 200 membranes were selected for their ability to remove naturalorganic matter and atrazine. Eighty percent of the water produced by thistreatment plant if nanofiltrated, with the remainder being biologically treated.Results of the full-scale data demonstrate that the distributed water quality wasimproved by the new treatment, with total organic carbon at the plant outletbeing lower than 1 mgC/L, total bacteria number decreased by 49%, andtrihalomethanes by 50%, when compared with the results obtained over the sameseason prior to the installation of NF. Includes 17 references, table, figures.