Sludge Treatment

Client: A Large-Scale Integrated Steel Manufacturing Plant

Location: Nanjing, China

Industry: Iron & Steel Manufacturing

Equipment Supplied: Sanshine Screw Press Dewatering Machine

Project Completion: 2026

Project Background

Steel manufacturing is one of the most water-intensive industries in the world. During the production process — including cooling, descaling, and wastewater treatment — large volumes of sludge are inevitably generated. This sludge contains heavy metals, suspended solids, and other contaminants, making proper treatment not only an environmental obligation but also a regulatory requirement.

Our client, a large-scale integrated steel plant with an annual output of over 5 million tons of steel, was facing significant challenges with their existing sludge treatment system. Their conventional belt filter press equipment was struggling to keep up with the volume of sludge produced, resulting in:

• High operational costs due to excessive energy and water consumption
• Poor dewatering efficiency, with sludge cake moisture content remaining above 85%
• Frequent equipment downtime and high maintenance expenses
• Increasing pressure from local environmental authorities to improve wastewater treatment standards

The plant urgently needed a more efficient, reliable, and cost-effective sludge dewatering solution.

Our Solution

After an in-depth on-site assessment and remote technical consultation, the Sanshine engineering team proposed a customized sludge treatment solution centered around our flagship SHDL-354 Screw Press dewatering machine.

Equipment Specifications:

Key Features of the Solution:

• Fully automatic operation with PLC control system, minimizing the need for manual intervention
• Self-cleaning mechanism to prevent clogging and reduce maintenance downtime
• Low-speed rotation design for quiet, energy-efficient operation
• Compact footprint to fit within the plant's existing facility layout
• Corrosion-resistant materials to withstand the harsh industrial environment of a steel plant

Implementation Process

Phase 1 — Pre-Sales Consultation & Design  
Sanshine's engineering team conducted detailed technical discussions with the plant's environmental management department. Based on the sludge characteristics, flow rate requirements, and site conditions, a customized solution with technical drawings and process flow diagrams was delivered within 20 business days.

Phase 2 — Manufacturing & Quality Control  
All four units were manufactured at Sanshine's production facility under strict quality control protocols. Each machine underwent comprehensive factory testing, including load testing, sealing inspection, and electrical safety verification, before being approved for shipment.

Phase 3 — Delivery & Installation  
Sanshine's experienced technical team traveled to the plant site to oversee and assist with the full installation and commissioning of all four units. The entire installation process was completed within 7 days, minimizing disruption to the plant's normal operations.

Phase 4 — Training & Handover  
On-site training was provided to the plant's operations and maintenance staff, covering daily operation procedures, routine maintenance, and troubleshooting. A comprehensive operation manual and maintenance guide were also provided.

Results & Benefits

Following the successful installation and commissioning of the Sanshine screw press dewatering machines, the steel plant experienced significant and measurable improvements:

Additional Benefits:

• Full compliance with local environmental discharge standards achieved
• Significant reduction in sludge disposal costs due to lower cake moisture content
• Improved working environment with lower noise levels and no flushing water odor
• Minimal operator intervention required thanks to fully automated control
• The plant successfully passed its annual environmental inspection with outstanding results

Client Feedback

"We had been struggling with our old dewatering system for years. After switching to Sanshine's screw press dewatering machines, the improvement was immediate and remarkable. The machines run smoothly around the clock with very little maintenance needed. Sanshine's team was professional and responsive throughout the entire project — from the initial design stage all the way through to after-sales support. We are very satisfied with both the equipment and the service."

— Environmental Engineering Manager, Steel Plant

Conclusion

This project demonstrates Sanshine's capability to deliver high-performance, customized sludge treatment solutions for demanding industrial environments. By replacing outdated dewatering equipment with our advanced screw press technology, the steel plant achieved dramatic improvements in efficiency, cost savings, and environmental compliance.