Screw Press

Ideal for municipal sewage treatment plants, food & beverage industries, paper mills, and industrial effluent plants requiring continuous, low-maintenance sludge dewatering.

Unique Features

Continuous dewatering of sludge with minimal operator intervention

Low energy consumption due to slow-speed rotation (2–4 RPM)

Self-cleaning screw design prevents clogging and reduces maintenance

Handles wide sludge variation (0.2%–5% inlet solids)

Compact, enclosed design minimizes odor and noise

Suitable for both municipal and industrial wastewater sludge

Frequently asked questions

Screw presses can handle a wide range of sludge types including biological sludge, mixed sludge, activated sludge, and industrial process sludge with inlet concentrations ranging from 0.2% to 5% total solids.

A screw press uses a slowly rotating screw within a cylindrical screen for dewatering, making it more energy-efficient and requiring less wash water. Belt filter presses use moving belts with higher wash water consumption and more maintenance.

Screw presses typically achieve cake dryness of 18–25% total solids (TS) depending on sludge type, polymer conditioning, and operating parameters.

Maintenance is minimal. The self-cleaning screw design reduces clogging. Routine maintenance involves inspecting the screen rings, checking the polymer dosing system, and periodic lubrication of bearings — typically once every 3–6 months.

Screw Press