Environmental Equipment Investments

Projects are underway at Dairyland’s two largest power plants

Baghouse construction at Dairyland’s Genoa Site

Dairyland has commenced work to retrofit our Genoa Station #3 (G-3) and John P. Madgett Station (JPM) power plants with state-of-the-art environmental control equipment that will result in significant air emission reductions. The G-3 coal-fired plant is located in Genoa, Wis. The JPM coal-fired plant is located in Alma, Wis.

More than $250 million has been included in Dairyland’s budget for current and future emissions control work. Installation of a fabric filter “baghouse” to remove particulate matter from the exhaust gas stream at the G-3 plant was completed in summer 2007. Already, results show a major reduction in particulate matter at Genoa as a result of the baghouse installation.

A baghouse was also brought into service at the JPM plant in October 2007. The new baghouses at each plant are in addition to the existing, highly efficient, electrostatic precipitator particulate matter control equipment.

Dairyland is in the engineering and design phase of a project to install a semi-dry flue gas desulfurization system, or “scrubber,” to remove sulfur dioxide, as well as technologies to reduce nitrogen oxide and mercury emissions. One of these technologies is a sorbent injection system, which sprays a limestone liquid into a chamber between the boiler and fabric filter baghouse. The limestone reagent absorbs sulfur dioxide and other acid gases in the hot gas stream. The hot gas stream is then cooled, thereby drying the reagent so it can be collected in the baghouse.

Once installed, the new air emission control equipment will achieve significant reductions of sulfur dioxide, nitrogen oxide, mercury and particulate matter.

Click here for background information on the JPM power plant.

Click here for background information on the G-3 power plant.