Volute Duo Screw Press

Energy efficiency and low-maintenance

• Quiet, odour-free operation
• No pre-thickening required
• Clog-free self-cleaning mechanism
• Fully automated system minimises oversight and OPEX cost
• Sensor-controlled operation - automatically run for 24-hours 
• The screws inside the cylinder rotate at a very low speed – approximately 2 to 4 rpm – consuming very little energy
• Extending the lifetime of consumable parts - the moving rings are driven by an external driveshaft to prevent contact with the screws

• Expandable controls to link to external tanks, conveyers, waste bulkers technologies

• Adjustable CIP systems to auto- clean between batches or low levels

• Self-cleaning filter for stable and constant dewatering 

• Low maintenance and operator interaction with automatic stop/start

Manufacture

•  All-in-one design and easy to install
• Designed with a smaller footprint than the standard Volute Dewatering Press
• Siemens HMI control panel can link to existing SCADA systems
• Compact flocculation tank
• Extendable base option allows for future proofing by increasing throughput
• Skid mount, containerised and floor mounted available

Chemicals

• Chemical regime optimised for use with our technologies

• Duo can incorporate PH correction if required

• Optional dynamic mixer reduces polymer use

Hire and trial

• Container and skid mounted options

The Volute Duo Screw Press is designed to efficiently dewater sludge while overcoming the clogging and maintenance issues found in traditional screw presses.

Unlike conventional designs that rely on fixed openings, which can become blocked with solids over time, the Volute Duo Screw Press features a self-cleaning mechanism. Its alternating fixed and moving rings continuously clean the fine gaps, ensuring consistent water release and preventing blockages. This allows for a more compact and efficient press, reducing the need for oversized equipment while maintaining high dewatering performance.

A key advantage of the Volute Duo Screw Press is its friction-less operation, where the moving rings are guided by an external drive mechanism, preventing direct contact with the screw. This eliminates wear points, greatly extending the lifespan of consumable parts and reducing maintenance requirements.

Additionally, the system operates at a low screw rotation speed (2–4 RPM), resulting in significantly lower energy and much reduced water consumption compared to alternative dewatering technologies. The fully enclosed design further enhances performance by minimizing odours and noise, making it an ideal solution for facilities requiring reliable, cost-effective, and low-maintenance sludge treatment.