Patent ID: 6551518
Filing Date: 2003-04-22
Classification: C02F

Abstract:
A method of treating a water reservoir by using at least one of chlorite, chlorine dioxide, and chlorate, the method comprising the steps of:(a) producing at least one of chlorite, chlorine dioxide, and chlorate by: feeding ozone into a water stream containing chloride to produce ozonated-chloride water wherein said ozone and water are mixed in an ozone contact chamber having a central vertical axis and defining an enclosed space and having an inlet, an outlet, a top and bottom, wherein said stream of water is injected with ozone and enters within the top quarter of said enclosed space and is withdrawn within 2 inches of said bottom to produce ozonated water, wherein the ozone and stream of water are injected into said enclosed space through said inlet and tangential to said central axis to impart turbulence and a swirling motion to ozone and stream of water contained within said enclosed space, wherein said ozone generally forms a laminar stratification within said enclosed space, wherein said ozone generally forms a laminar stratification within said enclosed space, with larger bubbles forming upper strata and progressively finer bubbles forming progressively lower layers, and wherein water with dissolved ozone is withdrawn via said outlet; and electrolyzing said ozonated-chloride water inside an electrolytic cell to produce at least one of chlorite, chlorine dioxide and chlorate; (b) introducing at least one of chlorite, chlorine dioxide and chlorate into a water reservoir.