Continuous low-speed operation at 2–4 RPM with fixed and moving self-cleaning rings — combines thickening and dewatering in a single unit for municipal and industrial sludge.
Self-cleaning ring mechanism ensures uninterrupted dewatering — no manual unclogging required.
Up to 80% lower energy consumption compared to centrifuge — 0.01–0.05 kW per kg DS.
No belts, no filter cloths — only rotating rings that clean themselves automatically.
Up to 60% space saving vs conventional dewatering — skid-mounted units available.
Dilute sludge (0.2–5% DS) is fed into the screw press inlet.
The slow-rotating screw at 2–4 RPM concentrates the sludge as it moves forward.
Fixed and moving rings create pressure, squeezing liquid out while solids advance.
Dewatered cake at 18–30% dryness exits the press for disposal or further drying.
Dramatically cuts disposal tonnage and transport cost.
Less sludge = fewer trips = direct OPEX savings every day.
Fully automatic — no skilled operator required for daily operation.
Handles variable sludge feed concentration without process upset.
| Parameter | Screw Press | Centrifuge | Belt Press |
|---|---|---|---|
| Energy Consumption | Very Low | Very High | Medium |
| Maintenance | Minimal | High (wear parts) | High (belt replacement) |
| Clogging Issues | None | Possible | Frequent |
| Operator Skill | Low | Skilled required | Moderate |
| Noise Level | Low (<60 dB) | High | Medium |
| Wash Water Use | Very Low | Medium | High |
| Footprint | Compact | Medium | Large |
| OPEX | Lowest | Highest | Medium |
Best suited for organisations focused on:
"A smart investment delivering consistent dewatering performance with the lowest lifecycle cost." — Wizwater Technologies