MIT SCREW PRESS

At its core, the screw press is a mechanical dewatering device. It uses a rotating screw housed inside a cylindrical screen to compress sludge and separate solids from liquids. As the sludge moves forward, the screw’s diameter and pitch gradually change, increasing pressure and forcing water out through tiny gaps in the screen. What’s left is a dry, compact sludge cake—ready for disposal or further processing.

How It Works

• Sludge enters the press and is slowly conveyed by the screw.
• As it moves forward, pressure builds due to the narrowing space.
• Water escapes through the screen while solids are retained.
• The result: reduced sludge volume and higher solids concentration.

This process is continuous, low-energy, and highly efficient, making it ideal for both municipal and industrial applications.

Benefits:

• Energy-efficient: Low power consumption compared to centrifuges
• Compact footprint: Ideal for space-constrained facilities
• Low maintenance: Few moving parts and minimal wear
• Quiet operation: No vibration or high-speed rotation
• Eco-friendly: Reduces sludge volume and disposal costs.

Applications:

• Municipal wastewater treatment plants for dewatering waste activated sludge (WAS), digested sludge, and DAF sludge
• Industrial facilities such as pulp & paper, food processing, and chemical manufacturing
• Sludge treatment systems integrated with anaerobic digestion or nutrient recovery.