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Method and apparatus for removing nitrates from water

  • US 5,614,078 A
  • Filed: 06/26/1996
  • Issued: 03/25/1997
  • Est. Priority Date: 06/01/1995
  • Status: Expired due to Fees
First Claim
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1. An apparatus for reducing nitrates in an aqueous solution, comprising:

  • a) an electrochemical cell in which the aqueous solution containing nitrates is treated, said cell comprising a container;

    b) an electrode system including a carbon fiber cathodic electrode, a carbon fiber anodic electrode, and a reference electrode, wherein all of said electrodes are immersed in the aqueous solution; and

    c) an electronic control circuit including a means for impressing a voltage across said electrodes causing electrochemical reduction/oxidation reactions on the surfaces of said cathodic and anodic electrodes, and means for controlling said electrodes at a potential wherein nitrates are reduced to gaseous products, and further wherein hydrogen, oxygen and chlorine are not produced.

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