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Individual Farm Model – 300 to 500 cows

Individual Farm Model – 300 to 500 cows. 3. Gas Capture: ~100,000 cubic feet per day, 60% methane. 73 MMBTU/day. 4. Electricity Generated: ~4,000 kWh/day. 3. Solids Produced: ~15 tons per day, 18 cubic yards. 1. Organic Input: ~6,000 gallons per day. 2. Digestion Tank Loading Rate:

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Individual Farm Model – 300 to 500 cows

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  1. Individual Farm Model – 300 to 500 cows 3. Gas Capture: ~100,000 cubic feet per day, 60% methane. 73 MMBTU/day 4. Electricity Generated: ~4,000 kWh/day 3. Solids Produced: ~15 tons per day, 18 cubic yards 1. Organic Input: ~6,000 gallons per day 2. Digestion Tank Loading Rate: ~10,000 gallons per day, 30 day retention 5. Heat Exchanged 1. Manure Input: ~4,000 gallons per day 3. Liquids Produced: ~6,000 gallons per day

  2. Hof Oegens – 185kW, model facility

  3. Hof Oegen - CHP Containerized CHP Output Meter Sensor Reports 185kW – containerized, quiet, process controls Sends hot water to greenhouses as well as electricity to grid

  4. Hof Oegen – Waste Heat Utilization Heat Exchanger Soil Sterilizer • 1,000m3 currently, heat production can support up to 4,000m3 • Looking to upgrade to a more efficient heat exchanger

  5. Anaerobic Digestion – GHG Reduction and Energy Combustion of Methane: CH4 + 2O2 CO2 + 2H2O Transforms methane (Global Warming Potential of 21-25) to carbon dioxide (GWP of 1) Replaces fossil fuel use for electricity generation and local heating = 300kW GenSet X 92.5% Uptime 2,430,900kWh per year 2,430,900kWh per year / 7,620 kWh per household = 319 Renewable Massachusetts Households per AD

  6. Impact of Nutrient Regulations/AD Effluent Spreading 450 400 350 300 250 1,000 tonnes of N per year 200 150 100 50 0 1940 1950 1960 1970 1980 1990 2000 2010 Fertilizer Manure Source: Tafdrup, Søren. ”Agricultural biogas in the future Danish energy supply” 2008.

  7. How Much? First Farm: All Set, Operational in 2010 Going from One to Five Farms: Project Challenge

  8. Challenge - Electricity Pricing Source: Danish Energy Agency, “Energy Statistic 2007”

  9. Challenges – Juggling Many Parties Farms Organics Energy Funding Scrape facilities Existing waste hauler Utilities Grant Programs Use, or willing to switch to organic bedding Allowances and incentives for organic waste diversion Workable net metering or feed-in tariff Short turn around for equity Truck Access (25 ton loads) Market size and current Cost of disposal Sale of excess electricity at close to retail Equity and Loans 3 phase power service Proximity Interconnection requirement Existing heat demand and waste heat user Equipment/ Construction Long term utility contract Co-products 350-1,000 cows, or ability to aggregate Bonds Attributes Fields with slight or no slope Equity Sources Organic fertilizer market Desire to control odor or environmental challenge Not bundled with energy Soil amendment market Cash Market

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