ENVISTA™ Vis Polymer Optimization System

Plant No. 1, in North Carolina, is an advanced activated sludge treatment plant. As part of its solids handling process, the town combines its waste activated sludge (WAS) with the WAS imported from two other facilities. The combined solids stream is then aerobically digested. Following stabilization, the sludge is dewatered via centrifuges and thermally dried. To improve its sludge dewatering, the plant uses a high molecular weight cationic polyacrylamide polymer.

Plant No. 2, in Connecticut, consists of primary settlers, trickling filters and activated sludge processes. Its sludge – a mix of 70% primary sludge and 30% WAS – is anaerobically digested and then dewatered by two belt filter presses. The plant uses a Mannich polymer to assist in dewatering.