Thickening of waste activated sludge (WAS) before anaerobic digestion can reduce costs substantially. Typically, WAS is more difficult to thicken than primary sludge. Traditional methods include gravity belt and rotary drum thickeners and dissolved air flotation (DAF).Now, Centrisys, a manufacturer of dewatering centrifuges and other products for the wastewater treatment industry, offers a hybrid technology designed to thicken without polymer and with low electricity consumption, and therefore at an attractive cost.The company’s THK hybrid thickening system also offers a compact footprint, an automated process that requires minimal operator attention and a closed-system design that simplifies the control of odors. Michael
