Multi-disk screw press for thickening and dewatering

The Multi-Disk Screw press (MDS) is a solid−liquid separator, which can achieve significant dewatering.

The sludge is thickened and dewatered progressively along the length of the vessel, which comprises a series of fixed and rotating rings, via the inner screw conveyor. The special tungsten carbide coating of the inner screw and its slow rotation reduces friction and assures a long life span of the system components. The filtrate is drained from the gaps between the rings, creating a thickening and a dewatering zone in different regions of the vessel. The sludge cake is discharged at the end plate, achieving a minimum solid content of 20%.

The advanced design of the MDS makes it a self-cleaning unit due to the friction free movement between the rings, is applicable across a wide range of sludge concentrations (2000 mg/L – 50000 mg/L), and is highly suited to oily sludge.