Home Cookin' With Homemade Biogas Energy

Learn to build a DIY anaerobic digester to turn biomass into clean, renewable biogas energy.



biogas digester opener
Feed the Biogas Digester: Biodigesters trap the methane gas from decomposing organic waste, such as manure and table scraps, and use it for producing electricity or cooking fuel. Methane is composed of carbon and hydrogen — CH4. It has an octane rating of 110 and produces about 1,000 Btu of heat per cubic foot of gas.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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This biogas-powered cooking stove receives the fuel for its steady flame from methane captured in the biodigester.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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Maitreya resident Christa Stark loads kitchen scraps into the biodigester.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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Stirring the table scraps into the muck of the biodigester exposes them to active methanogenic bacteria.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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The Maitreya Ecovillage biodigester turns 15 pounds of kitchen scraps and garden clippings into a day's worth of cooking fuel for the community's kitchen.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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Kitchen scraps become a slurry in the feeding chamber, eventually sinking into the digester where their subsequent methane production is utilized to produce cooking fuel.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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As the biomass decomposes, methane and carbon dioxide are created, inflating the rubber bladder to create pressure.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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Cleaning up and adding water to replace what is drawn off as liquid compost.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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The interior forms of the biodigester are shown here, with floor and wall reinforcements visible.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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The outer forms of the biodigester are reinforced to withstand the pressures of poured concrete.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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The finished concrete pour, with rubber bladder in place.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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Details of the frame, gasket and rubber bladder assembly are shown here.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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Rigid foamboard is used to insulate the tank and help maintain the correct temperature for the bacteria.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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At the output, the nitrogen-rich liquid fertilizer is extracted from the digester, which produces 5 to 10 gallons per day.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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The liquid fertilizer can be added directly to plants or covered with dirt or mulch to keep beneficial ammonia in the soil.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com
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The liquid fertilizer can be added directly to plants or covered with dirt or mulch to keep beneficial ammonia in the soil.
Photo ©2013 Isaac Marquez, marquezarts@gmail.com











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