Fig. 5.

Comparison of fermentation products produced in coculture system using strain N1-4, C. beijerinckii NCIMB 8052, and C. acetobutylicum ATCC 824 as butanol-producing strains. (a) Time course of butanol produced from cellulose by strain N1-4 (□), C. beijerinckii (▵), and C. acetobutylicum (○). (b) Fermentation end products obtained from three Clostridium strains cocultured on cellulose substrate. (c) Fermentation end products obtained from three Clostridium strains cultivated in CGM containing 40 g/liter glucose. For panels b and c, bars indicate production of acetate (vertical lines), butyrate (horizontal lines), ethanol (white), butanol (gray), and acetone (black). Values represent means of triplicate samples; error bars indicate standard errors. ND, not detected.