METHOD FOR DEHYDRATING AND CAKING RAPIDLY WASTE CONTAINING ORGANIC MATERIAL OR ORGANIC MATERIAL AND MUCH WATER

摘要

PURPOSE:To cake waste in a short time by adding a material, obtained by adding calcium sulfate, etc. to the material which is obtained by calcining and activating alunite in presence of cement, to the remaining flocculated material obtained by removing water to the utmost from said waste contg. an org. material or an org. material and a large amt. of water. CONSTITUTION:A material obtained by adding, if necessary, calcium sulfate, alumina, etc. to the calcined and activated alunite or the material added with low sulfuric acid-type ettringite double salt contg. 14-16 molecules of water of crystallization, calcium sulfate, alumina, etc. is added to the remaining flocculated material obtained by adding a flocculant to waste contg. an org. material or an org. material and a large amt. of water to remove water to the utmost. Consequently, ettringite is effective ly formed and grown in the presence of cement, and a porous mixture or the mixture having many capillaries is prepared. Or a highly water-absorptive substance such as bentonite, if necessary, is added to the waste in the absence of cement, and the whole material is caked by a layered acid clay derivative and its caking catalyst. Consequently, said waste can be caked in a short time (46-96hr on average) without heating and under natural conditions.