OZONATION AND ULTRAFILTRATION COMBINED TREATMENTS APPLIED TO DRINKING WATER PRODUCTION OZONE EFFECT ON MEMBRANE FOULING

摘要

Ultrafiltration (UF) is today a well recognized alternative process to conventional treatment for drinking water production. To treat surface water with a high charge of dissolved organic matter, UF is combined with other treatment such as an adsorption and/or an oxydation by ozone.The ozone effect on the improvment of permeate quality is well known. However the ozone effects on the hydraulic performances of the membranes is not well identified. The positive or negative ozone effect on the membrane fouling has been studied in this paper. The fouling mechanisms for different surface raw waters and synthetic waters are proposed depending on the ozonation operating parameters.