Wastewater Treatment for Ductile Iron Pipe Production
LW550x2250B Two-Phase Decanter Centrifuge Application in Centrifugal Casting Wastewater Treatment
Project Background
A leading ductile iron pipe manufacturer operates centrifugal casting machines for pipe production. The casting process generates mixed wastewater containing suspended solids, metal particles, and process chemicals. This wastewater requires treatment before discharge or reuse in the production cycle.
Customer Challenges
- Wastewater from centrifugal casting contains fine suspended solids and metal particles that settle slowly in conventional sedimentation tanks
- Production water consumption requires treated water recycling to reduce operating costs and fresh water requirements
- Existing treatment capacity cannot handle the continuous wastewater flow from casting operations
- Treatment system must operate continuously without interrupting the 24-hour casting production schedule
- Discharge standards require consistent treatment performance to meet environmental regulations
ZK SEPARATION Solution
The solution consists of one LW550x2250B two-phase decanter centrifuge and one polymer dosing and preparation system rated at 2.5kW. The decanter centrifuge performs solid-liquid separation of the mixed wastewater, with polymer addition to improve flocculation and separation efficiency.
Equipment Configuration
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Decanter Centrifuge
One LW550x2250B two-phase decanter centrifuge for continuous wastewater treatment operation
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Polymer Dosing System
One polymer dosing and preparation system, 2.5kW power rating, for automated flocculant addition
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Process Flow
Wastewater flows to the decanter centrifuge, where solid-liquid separation occurs. Separated solids discharge from the centrifuge, and clarified liquid exits for reuse or further treatment
Project Overview
- Customer Industry Ductile Iron Pipe Manufacturing
- Equipment Model LW550x2250B
- Equipment Type Two-Phase Decanter
- Processing Capacity 20 m³/h
- Polymer System 2.5kW Dosing Unit
Project Implementation and Results
The LW550x2250B decanter centrifuge operates continuously, treating mixed wastewater from the centrifugal casting production line.
Treatment Performance
Performance & Results
- Processing Capacity: The decanter centrifuge processes 20 m³/h of mixed wastewater from centrifugal casting operations
- Solid-Liquid Separation: The system removes suspended solids and metal particles, producing clarified liquid for reuse or discharge
- Continuous Operation: The equipment operates continuously to match the 24-hour casting production schedule
- Water Reuse: Clarified liquid quality allows recycling back into the production process, reducing fresh water consumption
- Operational Reliability: The system maintains stable operation with routine maintenance, supporting continuous production
Customer Testimonial
"The LW550x2250B handles our casting wastewater consistently at 20 m³/h. The clarified water quality is suitable for recycling, which helps reduce our water costs. The equipment runs continuously without interrupting production, and maintenance has been straightforward."
— Environmental Engineering Manager, Ductile Iron Pipe Manufacturer
ZK SEPARATION Technical Advantages
Industrial-Grade Construction
The LW550x2250B two-phase decanter centrifuge is built for continuous operation in industrial wastewater treatment applications.
Effective Separation Design
Bowl and screw design handles mixed wastewater containing suspended solids and metal particles from casting operations.
Polymer Dosing Integration
The 2.5kW polymer dosing system provides automated flocculant preparation and addition to improve separation efficiency.
Continuous Operation
Designed for 24/7 operation to match production schedules without interrupting casting operations.
Application Experience
Proven track record in industrial wastewater treatment, including metal processing and manufacturing applications.
Technical Support
Support from process design through installation and commissioning, with ongoing technical assistance.
