The United States has an enormous amount of untapped potential for collecting biogas from organic waste streams to produce useful forms of energy. Most of the U.S. biogas development in the last 20 years has used dairy manure as a feedstock source. Development has also occurred at wastewater treatment facilities or food processing facilities with a wastewater stream.
A livestock sector that has not received much attention for anaerobic digestion implementation opportunities is swine. According to a Market Opportunities report from US EPA AgStar there are 5,596 swine farms nationwide that are candidates for AD. Currently, there are 26 operational systems in the U.S. Given the gulf between potential and operational; we could be doing much better.
This whitepaper summarizes research findings assessing the barriers and opportunities for implementing anaerobic digestion projects using swine manure as a feedstock.

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