Uses the automatic development device and the said device which are superior in water saving efficiency the effluent treatment manner

摘要

PURPOSE:To improve water saving efficiency by circulating the washing water in a washing means and the washing water in a water storage means between the washing means and the water storage means and supplying a cleaning agent to the water storage means when the contamination concn. of the circulating water exceeds a prescribed value. CONSTITUTION:The photosensitive material after development and fixing processings is washed in a washing tank 1 after the washing tank 1 and the water storage tank 2 are filled with the unused washing water at the time of starting the development processing. The washing water is automatically replenished from the water storage tank 2 according to the processing amt. at this time. As a result, the used washing water overflowing from the washing tank 1 is sent as it its to the water storage tank 2 without being drained and is temporarily stored therein. The cleaning agent is supplied automatically from a cleaning agent supplying tank 4 to the washing water in the washing tank 1 and the water storage tank 2 to clean the washing water in the water storage tank 2 to a permissible value when the washing water in these tanks is contaminated. At least part of the cleaned washing water is thereafter drained by a draining means 5. The water saving efficiency is improved in this way and the used washing water is cleaned up to the level at which the draining to sewerage is pos sible.