Ruyang Dongyangguang 30 m³/h Water Reuse: Process Design and Results
Ruyang Dongyangguang 30 m³/h Water Reuse: Process Design and Results
WTEYA completed a 30 m³/h industrial water reuse system for Ruyang Dongyangguang Fluororesin Co., Ltd. in Guangdong Province. The project recycles production washing water containing dispersants, sulfates and diethyl malonate, achieving a total recovery rate above 65% with high-purity effluent for reuse.
Project Background and Water Quality
The fluororesin production line generates washing water with residual PVDF particles and dissolved organics. After plate-frame filter pressing, this water enters the reuse system as raw feed. The design target requires effluent conductivity below 5 μS/cm and TOC below 5 mg/L, suitable for washing post-treatment materials.
Three-Stage Process Design
The system follows a mechanical filtration, ultrafiltration and two-stage reverse osmosis configuration:
Pre-treatment: Raw water passes through a 200 μm self-cleaning filter followed by a 100 μm bag filter, removing residual PVDF particles and suspended solids to protect downstream membranes.
Ultrafiltration: The UF system achieves an effective recovery rate of 93%, with UF concentrate discharged to the plant wastewater system. A backwash and CEB chemical cleaning system extends membrane life.
Two-stage reverse osmosis: Each RO stage is protected by UV sterilization and 5 μm precision filters. The first-stage RO uses a high-pressure pump with two-pass membrane and internal circulation, reaching 75% recovery. The second-stage RO operates at 86% recovery, producing water that meets reuse standards.
System Highlights
Chemical cleaning systems are provided for both UF and RO, along with a UF CEB cleaning unit, oxidizing biocide dosing, reducing agent dosing and pH adjustment with sodium hydroxide. These automation systems ensure stable long-term operation with minimal operator intervention.
Results and Environmental Impact
The system delivers total production above 20.1 m³/h with effluent conductivity below 5 μS/cm and TOC below 5 mg/L. With overall recovery above 65%, the project significantly reduces fresh water consumption and wastewater discharge for the fluororesin plant, supporting sustainable manufacturing.
Frequently Asked Questions
Q: How to choose the right solution?
A: Consider your industry, capacity requirements, and environmental regulations. Contact WTEYA for expert guidance.
Q: What is the typical project timeline?
A: Project timelines vary based on capacity and complexity. WTEYA provides detailed project schedules during consultation.
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