Decanter Centrifuge & Vibrating Screen Manufacturer

With the increasing global focus on environmental protection, water reuse, and sustainable municipal infrastructure, efficient and cost-effective sewage treatment solutions are in strong demand worldwide. Recently, our company successfully supplied a complete sewage sludge treatment system for an overseas client, featuring a Slant Plate Clarifier, Screw Press Dewatering Machine, and an integrated Chemical Dosing Unit. This project reflects the growing international market recognition of compact, energy-saving sludge treatment technologies.

In many municipal and industrial wastewater treatment plants, front-end sludge concentration plays a critical role in improving overall treatment efficiency. The Slant Plate Clarifier, also known as an inclined plate clarifier, is widely used as a pre-concentration unit to increase sludge concentration before dewatering. Compared with traditional settling tanks, slant plate clarifiers offer a much smaller footprint while providing a significantly larger effective settling area. This makes them particularly suitable for overseas projects where land availability is limited or civil construction costs are high.

The Slant Plate Clarifier is a liquid–solid separation device designed to enhance sedimentation efficiency. When the flocculated sewage stream enters the inlet trough of the clarifier, it flows upward between a pack of inclined plates. Under gravity, the solid particles settle onto the surface of the plates and slide downward into the sludge collection hopper. Meanwhile, clarified effluent flows upward through orifice holes and exits from the top of the unit. This design greatly shortens settling distance and improves separation performance, even under variable flow conditions.

From a market perspective, slant plate clarifiers are increasingly favored in municipal sewage treatment, industrial wastewater pretreatment, and sludge thickening applications. Compared to decanter centrifuges, they are more economical, require lower energy consumption, and are easier to operate and maintain. These advantages make slant plate clarifiers an attractive solution for developing markets and for projects seeking to reduce operational costs without compromising treatment efficiency.

As the core sludge dewatering equipment in this system, the Dewatering Screw Press plays a vital role in reducing sludge volume and achieving stable dry solids content. The screw press operates continuously with low rotational speed, ensuring low power consumption, minimal noise, and reliable long-term operation. Its clog-free design is particularly suitable for sewage sludge with high organic content and variable characteristics, which are common challenges in overseas wastewater treatment projects.

To ensure effective flocculation and stable dewatering performance, the system is equipped with a Chemical Dosing Unit for flocculant preparation and dosing. The unit allows precise polymer solution preparation and controlled dosing, optimizing sludge conditioning before both thickening and dewatering stages. This integrated approach helps improve sludge cake dryness and reduces overall chemical consumption.

This overseas project demonstrates how the combination of a Slant Plate Clarifier, Screw Press, and Chemical Dosing Unit can form a compact, efficient, and cost-effective sewage sludge treatment solution. As global demand for sustainable wastewater treatment continues to grow, such integrated systems are expected to play an increasingly important role in municipal and industrial sewage treatment plants worldwide.