Crave Brothers unveil new manure-to-electricity system

Posted on June 29, 2007. Filed under: Digesters |



Bacteria in the biodigester (the tank on the left) produce methane gas, which is piped underground, and into a system to cool it (on the right) before the gas enters the building (behind the cooler) which houses the engine that burns the methane and turns a generator to create electricity.


Kelly Lang (above), renewable program marketing manager for Focus on Energy, shows the dried fiberous residue from the biodigestion process on the Crave Brothers Farm (just outside of Waterloo). Farmers can use the material for bedding or spread it for fertilizer. In addition, Crave Brothers adds it to potting soil, packages it in the purple bags behind Kelly and sells it under the name EnerGro. Focus on Energy provided funds for the computer control system of the Crave Brothers’ biodigester, installed by Clear Horizons.

Read more in an article by Bill Glauber in the Milwaukee Journal Sentinel.

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