Treatment manner and effluent treatment manner null of the halogenation silver black and white sensitive material which uses the automatic development device and the said device where water saving efficiency

摘要

PURPOSE:To enhance the water saving efficiency of the above device and to prevent the increase in the component of the residual fixer of the photosensitive material by providing a specific filter between a washing means and a water storage means to regenerate washing water and circulating the washing water between the above- mentioned means. CONSTITUTION:After the washing water is filled in a washing tank 1 and a water storage tank 2, the photosensitive material is subjected to a washing processing in the tank 1 and the washing water is replenished from the tank 2 according to the processing quantity of the photosensitive material. The overflowing water from the tank 1 is stored in the tank 2. The component of the fixer or the elution component from the photosensitive material carried into the washing water with an increase in the processing quantity are removed by the filter 4 contg. sulfur-oxidizing bacteria by which the washing water is regenerated. The use of a filter formed by immobilizing aerobic bacteria, such as Beggiatoa, on a carrier and packing the carrier to a cartridge shape as the filter 4 is possible and the thiosulfuric acid ions, etc., in the washing water are thereby decomposed.