After completing the construction of a SCR system and baghouse at the Lansing Generating Station in Lansing, Iowa in 2010, Interstate Power and Light Company (IPL) is now working on the installation of a scrubber on Lansing Unit 4, to reduce sulfur dioxide (SO2) emissions. We anticipate construction will begin in 2014 with commercial operation expected in 2015.
In the summer of 2010, Alliant Energy initiated start-up of the first large scale emission control project at Lansing Generating Station Unit 4. We installed a baghouse/carbon injection system and Selective Catalytic Reduction (SCR) system to reduce mercury (Hg) and nitrogen oxides (NOx) emissions.
Preliminary results have been impressive, with reductions of approximately 90% in Hg emissions and 80% in NOx emissions as compared to the historic emissions levels over the last five years. The next steps for this project include determining the long-term performance capability of the air pollution control equipment and fine-tuning the operation so that it continues to achieve emissions reductions over a variety of operating conditions.