System for electrodialysis treatment of liquids

  • US 6,537,436 B2
  • Filed: 05/31/2001
  • Issued: 03/25/2003
  • Est. Priority Date: 04/28/2000
  • Status: Expired due to Fees
First Claim
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1. A method for electrodialysis treatment of liquid mixtures including concentrate liquids and/or dilute liquids comprising the operations of:

  • providing a pretreating operation for filtration of inorganic contaminants and organic contaminants, said pretreatment operation generating a filtrate effluent;

    providing an adsorbing operation for adsorbing organic contaminants from said filtrate effluent utilizing activated carbon adsorption, said adsorbing operation generating a liquid fraction; and

    providing a deionizing operation for continuous purifying of said liquid fraction from said adsorbing operation, said liquid fraction including a plurality of liquid input streams, said deionizing operation including utilizing an electrodialysis stack having a plurality of disparate layers including a plurality of ion exchange membranes and separating gaskets, said deionizing operation selectively removing contaminant ions from said plurality of liquid input streams of said liquid fraction continuously directed along a tortuous path between respective ion exchange membranes and separating gaskets of said plurality of disparate layers of said electrodialysis stack;

    whereby said deionizing operation providing said electrodialysis stack having said plurality of disparate layers including ion exchange membranes providing continuous purifying of said liquid fraction including ethylene glycol and glycol/water mixtures, and providing continuous purifying of water, and/or continuous purifying of ethylene glycol and/or glycol and water mixtures.

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