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Oxidation process

  • US 8,784,669 B2
  • Filed: 03/15/2013
  • Issued: 07/22/2014
  • Est. Priority Date: 07/26/2007
  • Status: Active Grant
First Claim
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1. A process for disinfecting a batch of an aqueous solution to be treated, wherein said process comprises:

  • employing an apparatus that includes;

    a first part and a second part;

    the first part including a tank for receiving the aqueous solution to be treated;

    the second part including piping in fluid communication with said tank;

    said piping including an inlet mounted to draw the aqueous solution to be treated from said tank,said piping including an outlet mounted to return the aqueous solution to said tank;

    a pump mounted to urge the aqueous solution from said tank, through said second part, and then back into said tank; and

    a source of ozone operable to introduce ozone into said second part of said apparatus;

    establishing a batch of the aqueous solution to be treated in said tank, said batch of aqueous solution having a batch volume;

    urging flow of the aqueous solution to be treated through said second part of said apparatus;

    establishing a pressure portion of said second part of said apparatus upstream of said outlet, pressure in said pressure portion being an elevated pressure relative to pressure in said tank;

    maintaining the pressure in said pressure portion at a pressure of at least 1.5 atm,said step of urging including raising pressure in said aqueous solution to the pressure of said pressure portion;

    dissolving ozone in said aqueous solution;

    treating said aqueous solution with said ozone during passage thereof through said pressure portion while under the elevated pressure; and

    returning said aqueous solution to said tank;

    the step of returning including allowing said aqueous solution to return to the pressure of the tank;

    repeatedly recirculating said aqueous solution to be treated from said tank through said second portion and back to said tank for at least five minutes, until treatment of said batch has been completed; and

    said recirculating including recirculating a volume of flow corresponding to at least three and one third times said batch volume through said pressure portion during said process.

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