COD Abatement Research Articles

Application of Oxidation by a Combined Ozone/Ultraviolet Radiation System to the Treatment of Natural Water

Abstract When treating natural water, the simultaneous use of ozone and UV rays can lead to high level oxidation of the ozone–refractory organics. The main parameters affecting the efficiency of the O3/UV system are: the ozonation rate, the average UV radiation intensity, the pH measurement, alkalinity, and the type of compound to be oxidized. In optimum Ou/UV system application conditions, the abatement of COD in water from the Seine river is never above 30%. On the other hand, TOC removal is increased in weakly carbonated pond water loaded with humic matter. The O3/UV system also ensures oxidation of saturated volatile organic halogens, with the exception of carbon tetrachloride.