| abstract |
(57) [Summary] [PROBLEMS] To treat solid wastes such as dust, slag, sludge, soil, etc., add a metal collecting agent to these, knead them, solidify them with cement, etc. and finally dispose of them. Although a method is known, the metal trapping agent cannot immobilize calcium in solid waste, and when unimmobilized calcium elutes, the cement wall is destroyed and elutes to the immobilized metal There is a possibility that the operation becomes easier. Further, conventionally, since a large amount of cement or the like is required, there is a difficulty in the subsequent treatment or transfer of the waste solidified with the cement or the like. Further, in the conventional method, when toxic dioxins are contained in the dust, the dust and the like cannot be treated safely. SOLUTION: The solid waste treating agent of the present invention comprises a phosphorous acid and / or a hypophosphorous acid, or a phosphorous acid and / or Alternatively, the method for treating a solid waste according to the present invention is characterized by containing a hypophosphorous acid and an aluminum compound and / or a titanium compound. In this method, a solid waste treating agent containing phosphorous acid is added and kneaded to render the solid waste harmless. |