This study updates the previously published final report, 'Flue Gas Desulfurization System Capabilities for Coal-Fired Steam Generators,' EPA-600/7-78-032b published in March 1978. This assessment was made by reviewing the changes and developments in the technology since the preparation of the March 1978 report. A substantial increase in the number and capacity of operational FGD systems, plus the additional operational experience obtained by previously identified operational systems, have resulted in a substantial increase in the number and capacity of operational FGD systems, plus the additional operational experience obtained by previously identified operational systems, have resulted in a substantial increase in the amount of design and performance information. Most notably, these include dependability (availability, operability, reliability, and utilization) data, removal efficiency data (sulfur dioxide and particulate), operating problem and solution data, results from various research, development, and demonstration programs, and process and design innovations for new systems. Virtually all of the FGD operating experience gained to date has been with the wet-phase, nonregenerable, lime/limestone processes. As a direct result of this previous experience, the systems committed for operation within the next 3 to 5 years also show an overwhelming preference for lime/limestone processes. Analysis of the current status of the technology indicates that the design and operating experience gained with the first and second generation FGD systems has resulted in improved design and operation of subsequent installations. Because FGD systems that are being engineered and/or erected will incorporate many or all of these design innovations, even better performance can be expected without substantial cost increase.

Prepared by PEDCO Environmental, Inc., Cincinnati, Ohio, under contract no. 68-02-2811. Updates the previously published final report, "Flue gas desulfurization system capabilities for coal-fired steam generators, EPA-600/7-78-032b." Issued January 1979.