| 摘要 |
PROBLEM TO BE SOLVED: To provide a processing method and system of the waste fluid in photography which reduce environmental pollution. SOLUTION: A first method processes the photographic waste fluid pH to 7.5 or larger (preferably 9.0 or less) by adding solid alkali of solubility less than 30 mass% against 20°C water after decomposing it by oxidization. A second preferable method adds a solid inorganic flocculating agent containing an organic polymer coagulant 30 mass% or less to the waste liquid after decomposing it by oxidization. Further, a waste liquid processing device is provided to use in the waste liquid processing method which adds the above solid alkali, or preferably automatically adds the above solid inorganic flocculating agent. COPYRIGHT: (C)2006,JPO&NCIPI
|
