Patent ID: 7527736
Filing Date: 2009-05-05
Classification: C02F,C09K,Y02W

Abstract:
1. A method for generating fracturing water from produced water comprising: transferring produced water contaminated with at least one contaminant selected from a friction reducer and a fracturing polymer 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 dissolved air flotation treatment system; floating the aeration pond effluent with the dissolved air flotation treatment system to generate a floated aqueous effluent and a separated solids effluent; and providing the floated aqueous effluent as fracturing water to a fracturing fluid generation system.