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Chemical Fixation of Flue Gas Desulfurization Sludges and Fly Ash
Bishop, PL
Professor and head, University of Cincinnati, OH

Keener, TC
Associate professor, University of Cincinnati, OH

Dusing, DC
Graduate research assistants, University of Cincinnati, OH

Gong, R

Li, C-L

Pages: 16    Published: Jan 1992

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Source: STP1123-EB

Abstract

A study is under way to investigate the heavy metal binding mechanisms in solidified/stabilized high sulfur coal fly ash and flue gas desulfurization (FGD) sludges. Fly ash and sludge from a typical wet FGD process and dry flue gas desulfurization by-product from a demonstration lime injection multistage burner (LIMB) process are being evaluated. The latter material contains substantial portions of available lime and may prove amenable as a solidifying agent with the fly ash. This paper describes initial results on the waste characterization, solidified/stabilized waste form formulation, and influence of liquid/solid ratio on metal leaching from the waste forms.

Keywords:
stabilization/solidification, fixation, fly ash, flue gas desulfurization sludge, leaching, metals, LIMB ash

Paper ID: STP19545S
Committee/Subcommittee: D34.07
DOI: 10.1520/STP19545S
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