The most logical utility device for flue gas desulfurization was an electrostatic precipitator. The advantages to clients included low pressure drop, low power consumption and high efficiency. These overshadowed any other utility device for flue gas desulfurization. Limited fan capacity and downtime also favored the use of an electrostatic precipitator for flue gas desulfurization, since electrostatic precipitators have only 0.5" pressure drop and are low maintenance utility devices. PPC personnel were sure electrostatic precipitator proceedings would clean the gases, but weren't sure what other problem issues the electrostatic precipitator would introduce. This application was unique in that the gases were recirculated. PPC opted for processing the entire gas stream because of the various analysis unknowns.