ELEKTROLYTISCHER ENTSILBERUNGSPROZESS

摘要

PCT No. PCT/FR92/00418 Sec. 371 Date Nov. 12, 1993 Sec. 102(e) Date Nov. 12, 1993 PCT Filed May 11, 1992 PCT Pub. No. WO92/20838 PCT Pub. Date Nov. 26, 1992The present invention relates to an electrolytic desilvering method for photographic effluents. This method is carried out in an electrolytic cell comprising at least one anodic compartment and at least one cathodic compartment. The photographic effluent is treated in the cathodic compartment of the cell in order to reduce the silver ions in solution. The electrolyte is then recycled in the anodic compartment before being discharged to the sewer. This recycling in the anodic compartment allows to discharge to the sewer an effluent having a silver content less than 20 ppm.