Much is written about fracking fluid and whether wastewater treatment plants can and should accept it. But another kind of water from oil and gas production also needs proper handling, and Colorado’s Clifton Sanitation District is part of a promising potential solution.Fracking fluid is used in hydraulic fracturing of shale formations to release natural gas that is otherwise unavailable. It contains sand and various chemicals. After it is injected deep in the earth, much of it returns to the surface and needs treatment.Produced water is water present in underground oil and gas formations; it comes to the surface during conventional
