A prototype electrochemical reactor system was installed in late 1980 at X-Pert Metal Finishing to recover cadmium and destroy cyanide from plating rinsewater. Ninety-eight percent recovery of expected cadmium losses and 93 percent cyanide destruction were achieved. Payback was not realized in terms of metal recovery alone, but the system was economical when compared to upgrading the existing conventional waste treatment facility. The quality of the effluent discharged to the municipal sewer improved significantly. Monitoring identified the need for improved rinsing procedures and additional cyanide destruction capacity.

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