Behandlung photographischer Abwässer. Ein Umweltschutzproblem von wirtschaftlicher Bedeutung

Abstract

The chemical treatment of photographic effluents (eg. oxydation, precipitation) increases the production costs of photographic laboratories and should therefore be considered only as the last step of a series of measures to abate pollution.
The main measures are: Recycling of chemical solutions wherever possible, complete recovery of silver, economic use of water, energy recovery by heat exchangers. A carefully planned package of measures achieves pollution control and increases at the same time the profitability of a photographic laboratory.