Defeating the Warren County "grit monster" Warren County WWTP , Ohio - VLR 1 full of grit Few wastewater treatment plants (WWTPs) get to experience the disaster of what actually happens if a plant has absolutely no grit removal in operation at the headworks. At Warren County, in Ohio, over a five year period, engineers discovered the hard way the impact of grit on downstream processes – and the eventual struggle and costs necessary to remove it. When aeration basins were finally cleaned in 2013, 2,400 cubic yards or 1,386 tons had been removed and dewatered in a total of 128 geotextile bags. The story of Warren County, and its battle against what came to be called the 'grit monster’, presents salutary lessons for engineers, owners and operators of every wastewater treatment facility. Back

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