| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a treatment method in which heavy metals contained in dust generated during the incineration of waste are sealed to be prevented from eluting. SOLUTION: In the exhaust gas treatment apparatus of waste incineration facilities, slaked lime of at least 30m<2> /g specific surface area is sprayed into exhaust gas, and dust containing heavy metals such as Pb which is generated from the exhaust gas and captured by an electric precipitator and a bag filter is added with A liquid containing a soluble silicate aqueous solution as a main component, B liquid chiefly containing an aqueous solution containing a multivalent metal cation which reacts with a hydroxide ion and produces insoluble or poorly soluble hydroxide, and water as required. In this method, heavy metals contained in the dust generated during the incineration of waste are sealed surely to be prevented from eluting.</p> |
