[Terrapreta] Small scale pyrolysis system designs

[Charles Berkstresser]

I'm looking into developing a business model to implement small-scale
pyrolysis systems in farming communities in Brazil. I was wondering if there
are any small-scale system designs that are either public domain or
available for license that anyone knows of. Most of what I see that is
operational now on the business front seems to be large, industrial scale.
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