Multi-disk screw press

Screw Press Sludge
Dewatering MDS^®

Technology Shared in More Than 60 Countries

Over Than 4500 Operational Units

Screw Press Sludge
Dewatering MDS^®

Product Description

The Multi-Disk Screw press (MDS) is a solid-liquid separator, which can realize the dewatering effect. The sludge is thickened and dewatered progressively along with the inner screw conical shape, the movement of the free rings, and ending by the rotary plate. The special tungsten carbide coating of the inner screw and its slow rotation eliminates the friction effect and assure a long life span of the parts. The filtrate is drained from the gaps between the rings, which differs from the thickening and the dewatering zones. The sludge cake is discharged at the end plate, achieving a minimum solid content of 20%. The advanced design of the MDS make it a self cleaning unit due to the friction free movement between the rings, applicable for a wide range of sludge concentration (2000 mg/L – 50000 mg/L), and it’s most suitable for oily sludge.

Product Description

Treatment Process

Operating Principle

Structure Principle

Layers of spacers, fixed and free rings are secured in place by rods. The inner diameter of the free rings are slightly smaller than the screw major diameter, laying on the screw crest & continuously moving up and down following the screw rotation, & creating a self cleaning effect.

Dewatering Principle

The screw pitch & the zone in between becomes smaller towards the end plate, which gives pressure to dewater the sludge.

Dewatering Zone

Dewatering drum is comprised of interlaminated fixed rings and moving rings. Filtrate is discharged from the gaps between the rings.

Clog-free Structure

Moving rings are mobilized by the screw to prevent clogging.

Cylinder Check Point

With unique one-button quick opening design, easy to operate, operator can observe the internal operation of the machine at any time, check the dewatering effect of each section, and adjust the setting in time.

Ring for Reference

A special ring is positioned in each zone as reference for comparison to observe the rings and to schedule the overhauling intervention after exceeding the theoretical lifespan.

Pre-thickening Structure in Flocculation Tank

Pre-thickening structure is an optional module in flocculation tank to improve treatment capacity. With it, sludge can be thickened in flocculation tank; the machine capacity can be improved by more than 50% when it is dealing with sludge with low concentration (about/less than 1%).