Found a couple papers by a professor at Iowa State yesterday, I have 2 kids there.
https://lib.dr.iastate.edu/cgi/viewc...4&context=agdm
https://lib.dr.iastate.edu/cgi/viewc...6&context=agdm
I'm just interested in the stuff. I work for a structural engineering firm, we used to do some work for a local plant that started making ethanol. And I do some drafting (editing P&ID, kind of like flow diagrams) for mechanical engineer that is consulting for a different much larger ethanol company.
Doing a little research on sorghum now, didn't know they made ethanol from that till yesterday and use the left overs just like corn to make Dry or Wet distiller grains for animal feed.