Water resource recovering technology for coking wastewater biochemical treatment effluent

Water resource recovering technology for coking wastewater biochemical treatment effluent

  • CN 105,461,107 A
  • Filed: 12/01/2015
  • Published: 04/06/2016
  • Est. Priority Date: 12/01/2015
  • Status: Active Application
First Claim
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1. a coking chemical waste water bio-chemical effluent recycle-water resource technique, is characterized in that:

  • comprise the steps;

    (1) waste water is softened;

    (2) adopt catalytic oxidation to carry out COD degradation to the liquid that step (1) obtains, COD is reduced to below 50mg/L;

    (3) liquid obtained step (2) carries out multimedium and is separated with activated charcoal filter, suspended substance particle diameter is greater than 5um material and retains;

    (4) the product hydromining ultrafiltration that step (3) obtains is retained, 0.05um material is greater than to particle diameter and retains;

    (5) carry out nanofiltration membrane separation to the liquid that step (4) obtains, be separated by fluorion with calcium ions and magnesium ions, nanofiltration produces water calcium ions and magnesium ions lower than below 20mg/L, is difficult to form CaF2 crystallization fouling;

    (6) the product water obtained step (5) carries out the separation of reverse osmosis salt solution, and waste water water resources reclaims more than 85%.

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