id	keyword
brj-23629	pretreatment
brj-23629	methane
brj-23629	production
brj-23629	straw
brj-23629	microbes
brj-23629	anaerobic
brj-23629	value
brj-23629	methane production
brj-23629	group
brj-23629	ratio
brj-23629	size
brj-23629	corn