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 feature is internalized

摘要

PURPOSE:To enhance the water saving efficiency of the device and to provide the compact device by providing a means for regenerating used washing water and means for circulating the washing water between a washing means and a water storage means and building these means in this device. CONSTITUTION:This device is provided with at least a developing section, fixing section and washing section and the black and white photosensitive material is subjected to a washing processing with a washing tank 1 of the washing section. The washing water is replenished from the water storage tank 2 according to the processing quantity of the photosensitive material and the overflowing used washing water from the tank 1 is stored in the tank 2. The thiosulfuric acid ions accumulated in the washing water with an increase in the processing quantity are removed by the filter 4 to regenerate the washing water. The supply of a proper oxidizing agent and the decomposition of the above-mentioned ions are executed by providing an oxidizing agent supplying tank and the supplying of a cleaning agent and the cleaning of the contaminated washing water up to a drainable level are executed by providing a cleaning agent supplying tank 5.