| 摘要 |
PURPOSE:To discharge the waste developer clearing the effluent standard with the device capable of being run over a long period and easy to maintain by flocculating the waste developer of a non-silver salt photosensitive material, separating the treated developer into solid and filtrate and treating the filtrate with a reverse-osmosis membrane. CONSTITUTION:The waste developer of a non-silver salt photosensitive material is transferred from its storage tank to a flocculation tank 1, an aq. flocculant soln. in a flocculant tank 2 is added in a specified amt. to the waste developer by a fixed delivery pump 3 while being agitated by an agitator 4, and the flocculating components in the waste developer are flocculated. After a specified time, the waste developer in the tank 1 is sent to a centrifugal filter 6 and filtered. An inner tank 8 lined with a filter medium 7 is rotated in the filter 6 to separate the waste developer into the filtrate and residue, and the filtrate transiently stored in a filtrate tank 9 is then sent under pressure to a reverse-osmosis membrane treating device 11. The permeated liq. of the device 11 passes through a pipeline 12, treated with activated carbon, as necessary, and discharged into a sewerage, and the concd. liq. passes through the pipeline 13 and returned to the waste liq. storage tank. |
