Residuals thickening is an important aspect for effective nonmechanical and mechanical dewatering. Thickening not only reduces the volume of residuals to be processed, but it also enhances the performance of the dewatering equipment. EE&T has experience with evaluating and designing various residuals thickening technologies including: decant tanks, continuous flow gravity thickeners, gravity belt thickeners, centrifuge thickeners, and plate settlers. With numerous installations as a reference point, EE&T can evaluate the performance and economics of various residuals thickening technologies quickly and efficiently.