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!
It's never done THAT before. Explain it to me tiny ad:
Edible Landscaping With A Permaculture Twist/ Second Edition - Kickstarter