Dewatering system designed to treat grease trap wasteProblem: The City of Sheridan, Wyo., did not have a grease trap disposal facility within 150 miles and local restaurant grease traps were overflowing into the city sewer. The plant was equipped for sewage treatment using activated sludge aeration and a biosolids belt filter press. However, the fat, oil and grease plugged the digester and belt press.Solution: Sheridan chose a Lakeside Raptor SAP screen combined with an Auto-Vac sludge dewatering system from Alar Engineering Corp. The Raptor removes debris and inorganic solids, and the Auto-Vac automatically pH adjusts, adds polymer treatment and filters
