US Systems: Cornell University (1977) – One of the major early sites of US agricultural residue digestion research; a highly monitored, lined-plywood plug-flow
US Systems: Cornell plug-flow digester with gas storage and sampling ports
US Systems: Cornell University (1977) – two full-mix digesters, insulated externally
US Systems: Cornell University (1980) – winterized plug-flow digester – 6” of fiberglass insulation and a tarp covering the gas storage membrane
US Systems: A full-mix digester at a New York dairy farm (1983)
US Systems: Culvert to be used as a plug-flow digester at a Wisconsin dairy (1976)
US Systems: Electric generator in shed at the Wisconsin dairy (1977)
US Systems: Operations sheds and building covering one digester at Mason-Dixon Dairy (1986)
US Systems: Owner-built, concrete, gobar-gas-plant design system for handling residues of 16,000 chickens at Wisconsin farm; gas used to heat farmhouse. (1977)
US Systems: Covered lagoon digester at pig farm in North Carolina (1998)
US Systems:A 250-gallon oil tank digester set in a solar shed in Wisconsin by Al Rutan (1978)
US Systems: Construction of a fiberglass digester at a Wisconsin workshop led by Al Rutan (1978)
US Systems: A simple 4” valve on a smaller-scale system in Missouri (1983)
US Systems: Pennsylvania State University (1979) – the base or well for a gobar gas plant design system for dairy manures – constructed off-the-shelf silo parts.
US Systems: Lancaster Co,. Penna (1987) — Dried digested solids ready for land application
US Systems:Overflow storage pond for chicken system in Wisconsin (1977) Beware — Overloading the pond with nutrients can burn surrounding plants.
US Systems: Cornell University (1977) – plug-flow digester diagram
US Systems: A caveat! Remains of scavenged fuel-tank digesters after barn burned down around them in Missouri. (1983) (The fire was said to have been unrelated to the digesters – it would have exploded instead of just burned.) Methane at 4 to 14 % in air is very dangerous for explosions. Just don’t let it happen. You’al will certainly smell it — And it can be monitored.
US Systems: Gas storage at Mason-Dixon Dairy near Gettysburg, Pennsylvania. (1986) One of two large plug-flow digesters. System handles manure from 1200 milking cattle and provides electricity for farm operations plus income of $40,000 per month from local electric company.Please click on image for a larger view
US Systems: Mason-Dixon Dairy digester hardware system for securing gas storage cover to trench liner (1986)
US Systems: Lancaster Co., Penna (1987) — The operations shed for an almost wholly underground digester system generating electricity
US Systems: Covered culvert with equipment shed and rubber membrane in pond for gas storage at the Wisconsin dairy (1977)
