Method for treating landfill leachates using steelmaking slag and exhaust containing carbon dioxide

摘要

PURPOSE: A removing method of heavy metal ions and color in landfill leachate is provided to remove the heavy metal ions economically and efficiently, and to control organic materials and color. CONSTITUTION: A removing method of heavy metal ions and color in landfill leachate comprise the following steps: a step of passing the landfill leachate through a column in which AOD slag is charged; a step of adjusting the pH to 6.5-7.5 steadily by adding carbon dioxide containing exhaust gas in the leachate of pH 8-9; and a step of passing through the column filled with activated charcoal to remove the color of the leachate. The residence time of the landfill leachate passing through the column filled with AOD slag is 1.5-5 hours. The flow rate is 4-6S.V. [Reference numerals] (AA) Collection tank; (BB) Exhaust gas containing carbon dioxide; (CC) Process water; (DD) PH adjusting tank; (EE) AOD slag filled column; (FF) Activated charcoal filled column