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Mediated electrochemical oxidation of biological waste materials

  • US 7,387,719 B2
  • Filed: 04/23/2002
  • Issued: 06/17/2008
  • Est. Priority Date: 04/24/2001
  • Status: Active Grant
First Claim
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1. A process for treating and oxidizing biological waste, comprising circulating ions of mediator oxidizing species in an electrolyte through an electrochemical cell and affecting anodic oxidation of reduced forms of reversible redox couples into oxidized forms, contacting the ions with the biological waste in an anolyte portion of the electrolyte in a primary oxidation process, involving superoxidizer ions, having an oxidation potential above a threshold value of 1.7 volts at 1 molar, 25°

  • C. and pH1, wherein when said superoxidizers are present there is a free radical oxidizer driven secondary oxidation process, adding energy from an energy source to the anolyte portion and augmenting the secondary oxidation processes, breaking down hydrogen peroxide and ozone in the anolyte portion into hydroxyl free radicals, and increasing an oxidizing effect of the secondary oxidation processes, wherein the mediator oxidizing species arc selected from the group consisting of (a.) simple ion redox couples described in Table I as below;

    (b.) Type I isopolyanions complex anion redox couples formed by incorporation of elements in Table I or mixtures thereof as addenda atoms;

    (c.) Type I heteropolyanions complex anion redox couples formed by incorporation into Type I isopolyanions as heteroatoms any element selected from the group consisting of the elements listed in Table II either singly or in combination thereof, or (d.) hereropolyanions complex anion redox couples containing at least one heteroatom type element contained in both Table I and Table II below or (e.) combinations of the mediator oxidizing species from any or all of (a.), (b.), (c.) and (d.)

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