Importance

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Abstract

Apparatus and a method for disinfecting water by contacting the water with gaseous ozone. The device includes a series of treatment chambers that are interconnected serially by external transfer conduits, each transfer conduit including an introduction tap for introducing ozonated water into the water to be treated. The treated water flows sequentially from one chamber into the next. Hydrogen peroxide is added to the water as it enters a final chamber for final degasification of the water. Within each treatment chamber a mixing chamber is provided for additional intermixing and greater mass transfer of ozone with the water by alternately speeding up and slowing down the flow of the ozone-water mixture before the mixture is introduced downwardly into the respective chamber adjacent the lower wall thereof. An eductor and static mixer are provided to entrain and mix ozone and water to provide a sidestream of ozonated water for each of the several treatment chamber transfer conduits, and flow control valves are provided to permit regulation of the rate of flow of ozonated water for maximum desired disinfection. In another embodiment, direct diffusion of ozone into water flowing within the transfer conduits is effected by passing the ozone into ceramic, rod-type diffuser elements positioned within the conduits.

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First Claim