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Agrichar
is the term not for the biomass fuel, but for what is left over after
the energy is removed: a charcoal-based soil amendment. In simple
terms, the agrichar process takes dry biomass of any kind and bakes it
in a kiln to produce charcoal. The process is called pyrolysis. Various
gases and bio-oils are driven off the material and collected to use in
heat or power generation. The charcoal is buried in the ground,
sequestering the carbon that the growing plants had pulled out of the
atmosphere. The end result is increased soil fertility and an energy
source with negative carbon emissions.
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