yeah. I don’t think our accounting team tried that either. I ran across it while looking at the possibility of making my own. I was hoping to feed my spent biomass to edible mushrooms, and use them for my carbon source. Paul Stamets is on record suggesting it 10 years ago, but when I tried contacting him a couple of years back he didn’t have a working system yet. He’d had “some success”, but didn’t have time to “take on another project” (cellulosic ethanol from spent cannabis).
I know a very smart youngster who would be more than happy to go exploring down that rabbit hole…I’ve just got to get the tools together for him.