Osmosis dehydrator saves on cake disposal costs

Problem: The Henderson, Kentucky Wastewater Treatment Plant dewaters their biosolids to 17% cake solids via belt filter presses. Plant operators needed a way to further dry the solids to save in hauling and disposal costs.

Solution: They installed a 3.0-meter-wide Elode Electro osmosis dehydration dewatering unit from Charter Machine along with sludge holding bin and conveyors. The technology effectively takes 17% total solids cake and dries it to 42% total solids cake in under 2 minutes, with only the use of electrical AC power converted to DC power. It introduces the belt press dewatered cake to this DC field to separate water from solids via electrophoresis and electroosmotic processes.

Result: Use of the Elode Electro unit resulted in a 60% reduction in hauling costs for the plant. 732-548-4400; www.chartermachine.com