The report presents the results of a survey of operational flue gas desulfurization (FGD) systems on coal-fired utility boilers in the United States. The FGD system installed on Unit 1 at the Duck Creek Station of Central Illinois Light Company is described in terms of design and performance. The system consists of four parallel, wet-limestone, rod-deck scrubber modules designed for 25% capacity each, providing a total sulfur dioxide removal efficiency of 85%. The bottom ash, fly ash, and scrubbing wastes are disposed of in a sludge pond lined with a natural impermeable material. The first module of this four module FGD system was placed in service on July 1, 1976, and operated intermittently throughout the remainder of the year and for approximately one month in early 1977. On July 23, 1978, the three remaining modules were completed and all four modules were placed in the gas path for treatment of high sulfur flue gas.

"August 1979"--Cover EPA-600/7-79-199a-e. "PEDCO Environmental, Inc."--T.p. "Prepared for U.S. Environmental Protection Agency, Office of Research and Development."--T.p. "Contract no. 68-02-2603, task no. 24, program element no. EHE624."--T.p. "EPA Project Officer: Norman Kaplan Industrial Environmental Research Laboratory, Office of Energy, Minerals and Industry"--T.p. Sponsored by U.S. Environmental Protection Agency, Office of Research and Development

a. Duck Creek Station, Central Illinois Light Co. -- b. Lawrence Energy Center Kansas Power and Light Co. -- c. Cane Run Station, Louisville Gas and Electric Co. -- d. Sherburne County Generating Plant, Northern States Power Co. -- e. Bruce Mansfield Station, Pennsylvania Power Co.