On July 22nd, Engineering News-Record reported that OriginClear Inc. "has repurposed its machines to tackle flow-back water from the oil-and-gas industry."
"The technology uses a filtration system called electro water separation (EWS), which employs electrochemistry to separate the flow-back water from the oil and chemicals used in hydraulic fracturing. In the same way, EWS can treat produced water from conventional oil and gas wells"
Read more about the technology and its possible uses here: http://enr.construction.com/technology/construction_technology/2015/0722-algae-harvesting-technology-turns-frac-californian-water-into-irrigation-water.asp