PCA recycles photographic processing waste to recover silver and to regenerate spent fixer, developer, and bleach.
Silver is recovered using an electrolytic recovery unit with a rotating electrode.
Color developer is regenerated by ion exchange. This system consists of a sand filter, resin column, and two ion-exchange columns to remove bromide contamination from the developer. Bleach solutions are recovered by readjusting spent baths to the proper concentration. Case Summaries of Waste Reduction by Industries in the Southeast. One East Hazelwood Dr., Champaign, Illinois 61820.