http://worldcat.org/entity/work/id/10352820

Disposal of flue gas cleaning wastes EPA Shawnee field evaluation : second annual report

This report describes the progress made during the first two years (Septembre 1974 through October 1976) of a field evaluation project being conducted by the U.S. Environmental Protection Agency (EPA to assess techniques for the disposal of power plant flue gas desulfurization (FGD) sludges. The evaluation site is at the Tennessee Valley Authority Shawnee Power Station in Paducah, Kentucky. Two 10-MW prototype flue gas scrubbres, using lime and limestone, produced sludges that were placed in six test ponds. Three contain untreated sludges; each of the three remaining ponds contains sludges chemcially treated by one of three commercial contractors. Test samples of treated and untreated sludges, groundwater, supernate, leachate, and soil cores are being analyzed. Results to date indicate that the maximum concentration of total dissolved solids (TDS) in the leachate of treated ponds occured immediately after filling, or within a few months, and was approximately half that of the input liquors. Leachate from untreated ponds followed asimilar pattern, except the maximum concentrations were approximately the same as the TDS of the input liquor.

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