View Single Post
Old 07-13-2016, 05:04 AM
si_blakely si_blakely is offline
Join Date: Jul 2002
Location: UK
Posts: 4,914
Originally Posted by usedtobe View Post
Fermentation vs distillation.
Remember that distillation is just concentrating the products of fermentation.

So while yeast mainly produce ethanol during anerobic digestion, they do also produce some methanol. The problem is that methanol is rather toxic, and the concentration provided by distillation is enough to make the end result lethal, if the early fraction (containing most of the methanol) is not discarded.