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Anaerobic Digestion
Researchers are investigating the use of regional
anaerobic digestion units to produce chemicals and methane. The resulting
methane can then be combusted into heat or used to fuel engines that generate
electricity.
The first stage of anaerobic digestion converts cellulosic biomass to sugars
and acids. Valuable chemicals such as glycerol, acetic acid, other organic
acids and ethanol are produced in various proportions. After separating out
the chemicals produced in the first stage, the remaining material would be
used as a feedstock for the second stage of anaerobic digestion to produce
methane for electricity generation. Most of the original nutrients are retained
in the end product.
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