Biogas Projects

Farm Power Rexville

The Rexville digester pumps cow waste from two dairies into a million-gallon tank. Once in the tank, the manure heats up 100 degrees, speeding production of methane-producing bacteria. The resulting methane fuels a generator producing 750 kW of electricity - enough to power 500 homes each year.

Waste heat from the generator warms the digester tank – increasing the system’s overall efficiency and usefulness.

The process also produces a high-quality liquid fertilizer and animal bedding, leaving nothing to waste. The closed-loop system turns waste into useful materials and saves the dairy farmers about $100,000 each year on animal bedding alone.

"The animal bedding produced by the digester process is better quality than sawdust," Kevin Maas said. "It's softer and healthier, and cow health is invaluable to the farmers."

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About Farm Power

Farm Power’s mission is to keep the food supply near where people live. To do so, the company builds and operates digesters in partnerships with farmers who provide the manure. Brothers Kevin and Daryl Maas, who own Farm Power, do the project legwork, including designing the digesters and raising funds. So far, Smart Energy has participated in three projects with Farm Power. "We want to make community digesters work for farms that are too small to do it themselves," said Daryl Maas, Farm Power co-founder.

Like Smart Energy, Farm Power celebrated its five-year anniversary in 2012.