Immobilization of heavy metals contained in incinerator fly ash by application of soluble phosphate—Treatment and disposal cost reduction by combined use of “High Specific Surface Area Lime”

Evaluation results of combined application of “High Specific Surface Area Lime” and soluble phosphate as heavy metals immobilizing agent for fly ash intermediate treatment can help to reduce output of incinerator fly ash amount and total fly ash treatment and diposal costs. “High Specific Surface Area Lime“ injection rate to achieve same outlet HCL concentration will be reduced to about 1/2 of the conventional lime injection rate. As the residual lime content in the fly ash is reduced, the treatment costs by soluble phosphate can be remarkably reduced.