Sludge Dewatering at WWTP

Dewatering is the final volume-reduction step in the WWTP sludge line. After thickening and — at larger plants — digestion, sludge still contains 95–99% water. Mechanical dewatering with a screw press reduces this to a spadeable cake, cutting transport and disposal volume by up to 90%. The screw press sits downstream of the flocculation stage: conditioned sludge enters continuously, filtrate returns to the plant inlet, and dewatered cake drops to a skip or conveyor for disposal, composting or incineration.