Patterson Farms, Inc. is a 6th generation farm, which was founded in 1830. In 1999 the family installed a composting facility for composting solids (even prior to subsequently adding a digester in 2005). Because they had been spreading manure in summertime (since it is environmentally the best thing to do), the odor elicited complaints from neighbors, which prompted them to look into anaerobic digestion as a possible solution. Six years later, the complete mix digester was up and running. Currently, the digester processes 45,000 gallons per day of raw manure pre-mixed with 15,000 – 22,000 gallons per day of whey.
IFES Number: 44
Type of Firm: Farm
Main Products: Dairy; compost/bedding
Size of Firm: 950 milking cows; 2600 total acres
Ownership Type: Private
Energy System Components: Anaerobic digester
Operational Status: Operational
Year Installed: 2005
Energy Feedstock: Manure from 1,760 cows; food processing waste from Chobani, Freezland Campina (For 2014, a low year: Total volume of what went through digester = 16.5mil gal of manure + 3.4mil gal of food waste). 25% of what goes through digester is food waste.
Energy Produced: Biogas production: 173,300 cu_ft/day; 4,284 kWh power; 7 mmBtu/day heat from engine
Energy Uses: Cogeneration
Fossil Energy Inputs Replaced: none
New co-products: Compost/bedding
TCO2 Eq Avoided: 4,033 CO2E/yr
Outputs: biogas, Electricity, heat, bedding, fertilizer, dairy