Dewatering and Cake Storage
Belt filter presses, centrifuges, and screw presses all produce a dewatered cake — but the cake character varies, affecting downstream handling.
Belt filter presses typically achieve 15-20% solids cake, simple operation, moderate energy use — common at smaller and medium plants.
Centrifuges typically achieve 20-30% solids cake, higher capital cost than belt presses, efficient use of space, and effective on a wide range of solids — common at larger plants.
Screw presses typically achieve 18-22% solids cake, gentler on polymer, lower energy than centrifuges — increasingly favored for mid-range applications.
Cake storage — typically on concrete pads or in shallow bunkers — must account for odor, leachate runoff, and the regulatory need to keep cake contained until disposal or beneficial use.
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