Biogas Digesters
Following please find an array of links to help learn about anaerobicdigestion.
DOE's Biomass Program
The U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy provides a survey of a range of biomass technologies, including ethanol and biodiesel (i.e.biorefinery) technologies.
EPA's AgStar Program
US Environmental Protection Agency's AgStar Program provides outreach to farmers considering -- or presently operating-- an anaerobic digester system.
The Minnesota Project's Digester Page
The Minnesota Project provides case study information ondigesters.
AgMRC's Bioreactor Page
AGMRC provides a lengthy list of links on anaerobicdigesters.