Electroplating

Electroplating is an essential part of almost every machine building, metal working, metallurgy, microelectronics enterprises etc. It is a source of the most hazardous environmental pollution with heavy metals, inorganic acids and alkalis, surfactants and other toxic substances. "BMT" offers various technologic solutions for electroplating effluents processing including zero-discharge.

Electroplating effluents (galvanic waste) comprise diluted (rinsing water) and concentrated solutions (washing, degreasing, etching solutions and electrolytes). As a rule they are mixed before their further treatment. Chemical treatment, the most commonly used method for waste water processing, requires discharge and frequently does not reach heavy metals limits discharge requirements.

To solve this problem it is suggested to apply additional treatment units such as electrocoagulation, ion exchange, sorption and others. They are aimed at heavy metals reduction to reach the discharge requirements. But as a rule the purified water mineralization remains at the level when it cannot be reused in the production process.

Another solution is purification and desalination of the processed water using membranes or evaporation. The purified water in this case can be reused in production.

To find the correct method of galvanic waste water we should consider:

• Initial content of waste water and spent pickling solutions

• Purified water Requirements

• Operational schedule

The following technological solutions are possible:

• Heavy metals removal to meet the discharge requirements

• Zero discharge water cycle and water treatment according the Standards requirements of GOST 9.314-90 «Water for electroplating processes. General requirements».

The equipment is arranged in modules which can function both as a local treatment facility and as a complete facility system.