Bach Digester, LLC

In 2009, the Bach digester became an addition to Bach Farms in Dorchester, WI. In 2013, it expanded to include a second digester vessel (see next IFES case). Together they use manure produced by the dairy to produce methane gas that powers two 300 KW generators. The resulting electricity is enough to power 450 homes in the surrounding area.

The digester is a mixed-tank variety, where the manure flows through gravity from the freestall barns through 24-inch pipes into a tank called the “mix tank.” Along with this liquid manure, two 700 bushel box spreaders full of dry bedding pack, spoiled feed waste, and manger cleanings are added to the mix tank, which holds 100,000 gallons of manure waste.