Abstract: A method and apparatus for removing contaminants in waters used for industrial cleaning. The method and apparatus begins with water which has been purified to level of approximately 18 megaohms resistivity with total inorganic dissolved solids to 1 part per trillion and total organic dissolved carbon contaminants in the range of approximately 100 parts per billion, and purifies it to a level of approximately 18 megaohms resistivity with total inorganic dissolved solids to 1 part per trillion and total organic dissolved carbon contaminants in the range of approximately 10 parts per billion. The method and apparatus includes means for inducing cavitation in the water and irradiating the water with ultraviolet radiation to thereby cause the oxidizable contaminants to be oxidized and therefore removed before the water is used for industrial cleaning.

Abstract: A method and apparatus for removing oxidizable contaminants in cooling waters used to extract heat from the condenser coils of cooling towers. The method and apparatus includes means for removing a portion of the recirculating water which passes through the cooling tower to create a slipstream of water to be treated and treating the slipstream water with chemical to provide a hydroxyl free radical into the water to enhance oxidation, inducing cavitation in the slipstream water and irradiating the slipstream water with ultraviolet radiation to thereby cause the oxidizable contaminants to be oxidized and therefore removed before the slipstream water is reintroduced back into the cooling tower.