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Community Partnerships for a University-based Renewable Energy Biodigester

Community Partnerships for a University-based Renewable Energy Biodigester. Michael Lizotte Director of Sustainability. AASHE Conference, Pittsburgh October 10, 2011. Biomass is the Lead Renewable. Biomass as Biogas. Methane from anaerobic (no oxygen) digestion of biomass

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Community Partnerships for a University-based Renewable Energy Biodigester

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  1. Community Partnerships for a University-based Renewable Energy Biodigester Michael Lizotte Director of Sustainability AASHE Conference, Pittsburgh October 10, 2011

  2. Biomass is the Lead Renewable

  3. Biomass as Biogas • Methane from anaerobic (no oxygen) • digestion of biomass • Same use as Natural Gas • Need to clean/separate water, CO2, odor • Produced in liquid tanks, solid piles, landfills • Typical composition: • Higher methane content = more energy • Landfill gas is usually lower quality (45% methane)

  4. Land use efficiency of biofuels Energy for production Net Energy GJ/hectare Grass to heat Corn to gas Grass to gas Grass to liquid Corn to liquid Soy to liquid

  5. UW Oshkosh Facts Third largest university in Wisconsin Founded in 1871 (downtown, waterfront) 14,000 Students, 1700 faculty and staff Listed in Princeton Review Guide to Green Colleges

  6. UW Oshkosh Limitations: -- Dense Urban Setting; 2nd most crowded campus in the UW Mike Baldwin

  7. The First Commercial Scale Dry Fermentation System in the Americas The BIOFErm™ Plant at the UWO Campus

  8. Biomass (Food, Agriculture Waste, Yard Waste) Anaerobic Dry FermentationDigester Biogas (Methane) Generator(CHP = Combined Heat and Power) Electricity, Heat and Compost Biomass to Energy www.biofermenergy.com/us

  9. UW Oshkosh: opportunities and challenges Allendorf Germany

  10. BioFerm System: 3 Basic Components GAS GAS STORAGE GAS GENERATOR Sealed Chamber

  11. BioFerm System: 3 Basic Components GAS GAS STORAGE GAS GENERATOR Sealed Chamber

  12. “Dry” Process – water is recycled (no wastewater produced) GAS GAS STORAGE GAS GENERATOR PERCO- LATE Sealed Chamber “Percolate” – water, nutrients, microbes

  13. Add Biomass to Chamber… GAS GAS STORAGE GAS GENERATOR PERCO- LATE Sealed Chamber BIOMASS

  14. Oxygen is used up; methane is produced… GAS GAS STORAGE GAS GENERATOR PERCO- LATE BIOMASS

  15. Electricity and Heat are generated… GAS GAS STORAGE GAS ELECTRICITY GENERATOR PERCO- LATE HEAT BIOMASS HEAT HEAT Solid “digestate”  aerobic composter site (can be custom batched – e.g. organic)

  16. The BIOFerm™ plant at the UWO campus Odor Management • Enclosed mixing lobby reduces odorous air emissions. • Ventilated with 1.5 air exchanges per hour. • Process air released via a biofilter.

  17. URBAN SITING -- Next to Facilities Management Building (refurbished supermarket) -- across the river from campus -- Zoned for light industry MAIN CAMPUS

  18. URBAN SITING -- Next to Facilities Management Building (refurbished supermarket) -- across the river from campus -- Zoned for light industry -- Other Neighbors: -- sewage treatment plant -- yard waste dropoff site -- technical college -- senior center

  19. UW Oshkosh Renewable Energy Facility CHP Generator: 370 kW Annual Electric: 2,400 MWh (ca. 8% of UWO) Annual Heat: 2,700 MWh (ca. 8% of UWO) Oshkosh Wastewater Treatment Plant WPS Oshkosh Senior Center BIOGAS ELECTRICITY Fox Valley Technical College UWO CSC FEEDSTOCK HEAT DIGESTATE SOLIDS Commercial Composter UWO Campus Dairy Farms (bedding) City of Oshkosh Yard Waste Site Food Processing Plants Food Waste Collectors

  20. Hypothetical Feedstock Source Profile Tons/Year Retail Food Waste Municipal Food Farm and Industrial Food Waste UWO Municipal Yard Waste Year (Note: Facility lifetime is >20 yrs)

  21. The BIOFerm™ plant at the UWO campus Collaboration between: UW Oshkosh Foundation University of Wisconsin Oshkosh BIOFerm™ Energy Systems. The UWO Plant is a close copy of the BIOFerm™ plant built at the Viessmann Corporate headquarters in Allendorf, Germany

  22. Questions? Contact: Mike Lizotte 920-420-1732 Lizotte@uwosh.edu

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