A biodigester at Rosendale Dairy in Fond du Lac County was named Biogas Project of the Year by the American Biogas Council for its use of manure at Wisconsin’s largest dairy to provide clean electricity, hat, organic soil amendments and student hands-on learning opportunities.
Through a public-private partnership between the University of Wisconsin-Oshkosh, the UW-Oshkosh Foundatoin, Rosendale Dairy, Milk Source and BIOFerm Energy Systems/Viessmann Group, manure from the dairy’s 8,500 cows generates 1.42MW of electricity through on-site anaerobic digestion. Around 1,100 U.S. homes are powered annually by this renewable energy production, which additionally offsets the release of about 44,600 tons of carbon dioxide annually.
At Rosendale, manure is processed inside two of BIOFerm’s complete-mix COCCUS tanks after it has undergone sand separation. The biogas created from the anaerobic digestion process is combusted inside a combined heat and power unit. It is then sold to Alliant Energy and works towards reducing the university’s carbon footprint.
The Rosendale biodigester has maintained a 95 percent uptime for the year and produced an average of 133,743 kW since June.
To learn more about the biodigester, please read this story Midwest Agriculture Almanac did on it earlier this year.