Rosendale Dairy, the largest dairy in Wisconsin, installed a 1.4 MW wet fermentation digester system in the Spring of 2013. The project includes not only utilizing manure from the dairy’s 8,500 cows to make biogas, but also the creation of a public education center and a research laboratory for UW-Oshkosh students and staff. The site will also serve as a training facility for future biogas operators. The project is the third digester in collaboration between the University of Wisconsin—Oshkosh and BIOFerm™ Energy Systems.
Plant Dimensions and Process
The anaerobic digestion portion of the facility’s footprint is approximately 12,059 square feet: the two COCCUS tanks are a combined 10,053 square feet, the pump building is 506 square feet, the mechanical building is 1,080 square feet and the separator mezzanine is 420 square feet.
To meet the Power Purchase Agreement, the plant system is designed to process approximately 350 tons of manure a day.
1.4 MWelcontinuous power engine (combined heat and power unit, CHP)
- 1.4 MW electric capacity
- 1.5 MW thermal capacity
Expected annual energy production
- 11.8 million kWh electrical production
- 12.5 million MMBTU thermal production