Mechanical Principle

The initial section of dewatering drum is Thickening Zone where the solids-liquid separating process takes place and where the filtrate will be discharged. The pitch of the screw and the gaps between the rings decrease at the end of dewatering drum, increasing the internal pressure of the drum. At the end, End Plate further increases the pressure so as to discharge dry sludge cake.

Process Diagram of the Vloute Dewatering Press

Sludge, first fed into the Flow Control Tank, flows into the Flocculation Tank where polymer coagulant is added. From there, the flocculated sludge overflows into the dewatering drumwhere it is filtered and compressed. The entire operation sequence, including sludge feedcontrol, polymer makeup, dosing and sludge cake discharging, is controlled by the built-in-timer and sensors of the Control Panel.