REMOVAL OF TOXIC MATERIAL IN MUNICIPAL SOLID WASTE INCINERATION BOTTOM ASH USING ULTRASONICATION

摘要

PURPOSE: A method for eliminating toxic materials from the incineration bottom ash of municipal solid wastes is provided to effectively eliminate dioxins and chlorides from the incineration bottom ash through a mechanical-chemical processing process, a washing process, and a carbonating process. CONSTITUTION: The incineration bottom ash of municipal solid wastes is dried. Granulated blast-furnace slag is added to the dried incineration bottom ash. The incineration bottom ash with the granulated blast-furnace slag is activation-pulverized in order to eliminate dioxins. The incineration bottom ash without the dioxins is stirred with distilled water in which the pH thereof is between 5 and 7 in order to eliminate soluble chlorides. Carbon dioxide gas is injected into the incineration bottom ash without the soluble chlorides in order to carbonate the non-soluble chlorides, and the carbonated non-soluble chlorides are eliminated.