The Dowa basic aluminum sulfate desulfurization process is being tested to demonstrate the process for SO/sub 2/ removal from the flue gas generated by a coal-fired boiler. This report summarizes the second demonstration program conducted on a 10 MW equivalent modified Turbulent Contact Absorber (TCA) located at the TVA Shawnee Steam Plant, Paducah, Kentucky. It included the operation of an improved sulfite forced oxidation system and demonstrated the aluminum recovery system for approximately seven days. The Dowa process was capable of removing 90 to 95 percent of the SO/sub 2/ in flue gas from a coal-fired utility boiler at inlet SO/sub 2/ concentrations of approximately 2000 ppM and with a limestone utilization of essentially 100 percent for short periods. The process produces a fully oxidized solids waste (gypsum) but also produces a liquid waste stream containing high total dissolved solids. The main objective of demonstrating the long-term reliability of the process under commercial conditions was not met because of the difficulties in the control of solution basicity and the delay in selecting a suitable scrubber packing for testing. 2 figures, 5 tables.