Beginning in May of 2009, the anaerobic digester project at Bortnick Dairy LLC involved installing a mixed anaerobic digester, an engine generator set, and a solids separator to treat manure from 1450 dairy cattle as well as food waste. The project produces biogas and manure solids for bedding. Captured biogas is used for electricity generation that offsets the farm’s electric use, and if there is excess it is sold to the utility through a net metering agreement. Data show that, from May 1, 2009 to November 22, 2009, the digester and engine genset generated 51,000,000 scf of biogas and 1,820,000 kWh electric, respectively.
Inputs to the digester include manure loading from onsite and four truck loads per week of food waste with each truck averaging 5,500 gallons of material. Separated solids produced are estimated at 100 cubic yards per week based on sawdust replaced and sales to a landscaping company. The $1.4 million project was funded by Bortnick Dairy with assistance from USDA-RD and PADEP Energy Harvest Grants, and is providing over $280,000 in annual revenue to Bortnick Dairy.
IFES Number: 275
Type of Firm: Farm
Main Products: Dairy
Size of Firm: 1450 dairy cattle
Operational Status: Operational
Year Installed: 2009
Energy Feedstock: Cow manure from 1450 dairy cattle + 5,500 gallons of material/week of food waste
Energy Produced: 3,640,000 kWh/year; Biogas production: 247,000 cu_ft/day
Energy Uses: Cogeneration
New co-products: Bedding
Money Saved: $280,000 annual revenue
TCO2 Eq Avoided: 4,954 metric tons CO2E/yr