Nestled in the foothills of the Cascades, the agricultural community near Enumclaw, Washington, has been organizing to build
a methane digester for nearly a decade.
Not exact matches
Methanosaeta were the dominant
methane - producing microorganisms in the
digesters and known to convert acetate to
methane, but analysis of the gene expression in the
digester revealed that Methanosaeta were also highly expressing genes
for converting carbon dioxide to
methane.
While the greenhouse gas footprint of the production of other foods, compared to sources such as livestock, is highly dependent on a number of factors, production of livestock currently accounts
for about 30 % of the U.S. total emissions of
methane.316, 320,325,326 This amount of
methane can be reduced somewhat by recovery methods such as the use of biogas
digesters, but future changes in dietary practices, including those motivated by considerations other than climate change mitigation, could also have an effect on the amount of
methane emitted to the atmosphere.327
Four years ago Duffy Connolly, owner of Burrows Hall Farm, approached Santee Cooper with the idea of building an anaerobic
digester that could capture
methane gas, naturally produced on his hog farm, and turn that
methane into a fuel source
for electricity.
It also captures the heat produced when the
methane is burned
for the turbines and uses it to warm the
digester tanks.
Methane recovery -
Methane emissions, e.g., from oil or gas wells, coal beds, peat bogs, gas transmission pipelines, landfills, or anaerobic
digesters, are captured and used as a fuel or
for some other economic purpose (e.g., chemical feedstock).
Project type: Farm Power What they do: Manure from the dairy is fed into an anaerobic
digester where the
methane is captured and used
for energy production.