Exeter Agri-Energy


EAElogoAgri-Cycle works with a growing network of processing partners who turn your waste into energy. One of these partners is our sister company, Exeter Agri-Energy (EAE), collocated with our parent company, Stonyvale Farm. Manure from the farm’s 2,000 dairy cows is combined with food waste in EAE’s anaerobic digester for efficient conversion into biofuel and fertilizer.

The EAE facility features a dual vessel, 1-MW anaerobic co-digestion system with a total daily treatment volume of 32,000 gallons, or 150 wet tons. The 1,500 horsepower engine produces 23,000 kWh of electricity daily, enough to power as many as 800 households per year. The amount of heat produced on a daily basis is enough to replace 700 gallons of heating oil, which on an annual basis is sufficient to heat 300 New England homes.

Additional Partners

Laforge Bioenvironmental

St. Andre, New Brunswick, Canada

Laforge Bioenvironmental Biogas is a leader in bringing green solutions to the province of New Brunswick. It produces three million kWh of electricity per year, which is fed into the NB electrical grid, powering more than 300 homes. The facility also generates 13,000 metric tons of nitrate-rich fertilizer annually, which is spread on surrounding fields.

Lewiston Auburn Water Pollution Control Authority

Lewiston, Maine

The anaerobic digestion facility at the Lewiston Auburn Water Pollution Control Authority consists of two mesophilic digesters with a capacity of 690,000 gallons each. The facility digests approximately 45,000 gallons per day of thickened activated and primary sludge—producing more than 14,000 cubic yards of digested material annually—which is either land-applied or sent to the Authority composting facility in Auburn.

Vanguard Renewables

Rutland and Hadley, Massachusetts

Vanguard Renewables operates two anaerobic digesters in Massachusetts: at Jordan’s Dairy Farm in Rutland and Barstow’s Longview Farm in Hadley. The company markets fertilizer products derived from digestion. The biogas produced at each site is used to power small combined heat and power units, which provides electricity and heat to the farms’ buildings. Surplus electricity is distributed through the power grid.

Vermont Tech Community Anaerobic Digester

Randolph, Vermont

This project of Vermont Technical College supports education for Vermont’s future, local agriculture, and sustainable renewable energy. The anaerobic digester uses a two-stage, mixed substrate technology from Europe, powered by a mixture of farm manure and clean food residuals to produce renewable electricity for Green Mountain Power, renewable heat for the college, and recycled nutrients for the farming community.

Calling all digesters!

If you’re an anaerobic digestion facility and you’re interested in partnering with Agri-Cycle, we’d love to hear from you.