Calgren Ethanol Biodigester to power ethanol production using dairy waste

In California, sustainable energy production has entered a new era in California as a consortium of American companies recently joined together with state energy officials to launch the Calgren Ethanol Biodigester, which utilizes waste from dairy farms to power the production of tens of millions of gallons of ethanol, all consumed in the Central Valley.

The two-stage mixed plug flow digester was designed by DVO Inc. of Wisconsin and built by Regenis, the largest builder of digesters in the western United States. It is the first California digester to use agricultural waste to create renewable natural gas to power another renewable energy facility, creating a step forward in a virtuous, zero waste lifecycle.