Case Study: Mastering Phosphorus Chemical Wastewater Treatment
Outstanding performance of ZK SEPARATION LW650 x 2450B in high-solid, complex industrial effluent
Project Background
Wastewater from phosphorus chemical manufacturing presents a unique set of challenges, including fine suspended solids, phosphates, and various reaction by-products. For one producer, this meant dealing with high turbidity and variable feed conditions that pushed their traditional sedimentation and filter-based systems to the limit. As production expanded, they needed a more stable, high-capacity solution to meet stringent discharge requirements.
Customer Challenges
- High suspended solids concentration and fluctuating composition; unstable clarity after primary treatment
- Excessive sludge moisture content leading to high transport and disposal costs
- Frequent filter blockage and maintenance; process bottlenecks during peak production
- Increasingly strict environmental compliance limits for phosphorus-related indicators
ZK SEPARATION Solution
Based on the raw water characteristics and capacity targets, we recommended the LW650 x 2450B two-phase decanter centrifuge. The solution emphasizes high G-force separation, optimized beach angle and conveyor geometry, and a robust dual-motor drive to ensure stable dewatering under variable load conditions.
Equipment Technical Parameters
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Model
LW650 x 2450B two-phase decanter centrifuge
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Speed & G-Force
Design speed 2500 RPM, maximum centrifugal force 2275G
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Motor Configuration
Main motor 90 kW, auxiliary motor 30 kW, vector control for torque balance
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Processing Capacity
Designed treatment capacity 40 m³/h
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Materials & Protection
Key wetted parts in corrosion-resistant stainless steel; wear-resistant tiles on conveyor for abrasive solids
Treatment Results
After adopting the ZK SEPARATION decanter centrifuge, suspended solids were significantly reduced and sludge dryness improved. Effluent stability and overall system throughput were both enhanced, supporting compliant discharge after downstream polishing steps and lowering total operating cost.
Performance Highlights
- SS Removal: High capture efficiency for fine particles; visibly improved effluent clarity
- Sludge Moisture: Reduced moisture content enabling lower transport and disposal cost
- System Throughput: Stable 40 m³/h capacity with buffer against feed fluctuations
- OPEX Reduction: Lower polymer and maintenance demand; simplified downstream handling
- Compliance: Effluent quality improved; suitable for downstream treatment to meet local discharge requirements
Customer Testimonial
"The ZK SEPARATION decanter delivered the stability we were missing. We now have consistent separation performance and reliable results that, together with downstream treatment, support discharge compliance. The impact was immediate: sludge volumes decreased noticeably, and our daily operations became far more predictable. This has been key to helping us meet both our production and environmental goals."
— Environmental Department Manager, Phosphorus Chemical Company
Why ZK SEPARATION
Robust Process Window
Optimized bowl and conveyor geometry with high torque reserve to handle variable solids loading without compromising dryness or clarity.
Durable Materials
Key wetted parts use corrosion-resistant stainless steel; wear protection on high-wear zones extends lifetime under abrasive conditions.
Intelligent Control
PLC-based control with real-time differential speed management for consistent cake dryness and centrate quality.
Lifecycle Support
Comprehensive after-sales service and optimization support to ensure long-term stable operation.
