POSITIVE ACTION OF NANOFILTRATION ON MATERIALS IN CONTACT WITH DRINKING-WATER

The nanofiltration process for water treatment acts as an excellent ph ysical barrier for elements and molecules contained in water. The effe cts of water parameters such as mineralisation, organic matter, sulpha tes and chlorides are greatly reduced by this process. This has a posi tive effect on the lifetime of the distribution networks and on the re lease of metallic species in drinking water. Experimental studies have shown that nanofiltration with limited post-treatment reduces lead so lubility up to 50% and produces water with characteristics which allow the protection of all materials in distribution systems. A sort of id eal water with a low corrosivity for materials used in public and dome stic networks is obtained with such treatment.