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DISPOSAL OF FLUE GAS CLEANING WASTES: EPA SHAWNEE FIELD EVALUATION. SECOND ANNUAL REPORT
Citation:
Fling, R., W. Graven, P. Leo, AND J. Rossoff. DISPOSAL OF FLUE GAS CLEANING WASTES: EPA SHAWNEE FIELD EVALUATION. SECOND ANNUAL REPORT. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/7-78/024 (NTIS PB282246), 1978.
Description:
The report describes progress made during the first two years of a field evaluation of treated and untreated ponding techniques for the disposal of power plant flue gas desulfurization sludges. The evaluation used two 10 MW lime and limestone flue gas scrubbers of TVA's Shawnee Power Station, Paducah, Kentucky. Results indicate that the concentration of total dissolved solids (TDS) in the leachate of treated ponds was maximum immediately after filling, or within a few months, and was approximately half that of the input liquors. Leachate from untreated ponds was similar, except that the maximum was approximately the same as the TDS of the input liquor. After 2 years, TDS in the leachates of all ponds are between 33% and 50% of that of their respective input liquors. Leachates from the evaluation ponds exhibit decreasing concentrations of chloride ion, and the TDS have stabilized at approximately gypsum saturation. Trace elements exhibited little change. Chemically treated sludges continue to exhibit good landfill strength and generally reduce the mass release of sludge constituents to the subsoil by at least 2 orders of magnitude.