Cellulose is a difficult material to break down via microbial digestion. Considering this, then there is the problem of producing very small amounts of methane if any. Biomass gassification for wood is a better option.
Those who hammer their swords into plows will plow for those who don't!
He repaced his skull with glass. So you can see his brain. Kinda like this tiny ad:
Your suggestions have been mashed into the PIE page - wuddyathink?