TREATMENT PROCESS OF LIQUID WASTE OF DEVELOPER/FIXER FOR DEVELOPING PHOTOGRAPH SUCH AS X-RAY PHOTOGRAPH AND LIQUID WASTE OF ANTIFREEZING FLUID OR THE LIKE

摘要

PROBLEM TO BE SOLVED: To reutilize liquid waste of a developer and a fixer, each used for developing a photograph such as X-ray photograph, and liquid waste of an antifreezing fluid or the like, without discharging such liquid waste as effluent by detoxifying the liquid waste and solidifying the detoxified liquid waste.;SOLUTION: In this treatment process for detoxifying such liquid waste and solidifying the detoxified liquid waste, there is such a problem that since the pH value of the liquid waste of a developer or antifreezing fluid is greatly different from that of a fixer, the liquid waste of the developer or antifreezing fluid must separately be treated from the liquid waste of the fixer. Also, while a portland cement-based solidifying agent is capable of easily solidifying such liquid waste even at a high pH value, an alumina cement-based solidifying agent can appropriately be used for solidification of such liquid waste at a pH value of ≤7. Thus, the treatment process involves treating the liquid waste of the developer or antifreezing fluid with a normal portland cement-based solidifying agent and treating the liquid waste of the fixer with an alumina cement-based solidifying agent, to solve the above problem.;COPYRIGHT: (C)2001,JPO