Waste Water Treatment Method

  • US 20100038310A1
  • Filed: 03/06/2009
  • Published: 02/18/2010
  • Est. Priority Date: 09/01/2006
  • Status: Active Grant
First Claim
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1. A method for generating fracturing water from produced water:

  • transferring produced water contaminated with slick water, methanol and boron into an anaerobic pond;

    holding the produced water in the anaerobic pond for at least a first mean residence time;

    transferring anaerobic pond effluent to an aeration pond;

    aerating the anaerobic pond effluent in the aeration pond for a second mean residence time;

    transferring aeration pond effluent from the aeration pond to a solid/liquid flocculation separator; and

    separating the aeration pond effluent with the solid/liquid flocculation separator to generate an aqueous effluent separated from a solids effluent;

    biologically digesting the aqueous effluent in a bioreactor until a desired concentration of methanol is obtained;

    transferring bioreactor effluent from the bioreactor to a reverse osmosis system;

    separating contaminants from bioreactor effluent with the reverse osmosis system, the reverse osmosis system passing at least some boron in its permeate; and

    removing the boron from the reverse osmosis permeate via a boron-selective removal process to obtain a desired level of boron in the reverse osmosis permeate.

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