Eco-Friendly Copper Plating: Zero Heavy Metal Discharge & Water Recycling

2025-03-01

Wastewater Composition

Typical effluent contains:

• Cu²+ (50-200mg/L);

• H2SO4 (pH 1-2);

• Organic additives (brighteners, levelers).

Closed-Loop System Technologies

1. Waste classification:

   • Low-concentration rinse water → MBR treatment;

   • High-concentration waste → vacuum evaporation (95% recovery);

2. Copper recycling:

   • Electrolytic recovery (≥99.5% purity for reuse);

3. Neutralization:

   • Lime slurry adjusts pH to 7-8, precipitating sludge (Cu <0.5ppm).

Compliance & Savings

• ISO 14001 certified, wastewater cost: $2.5\mathrm{/}{m}^{3}vs\mathrm{.}$8/m³;

• Annual copper recovery value: $12,000 (500T output);

• Avoids EU REACH fines (potential savings: $200,000/year).