Hydrogen and volatile fatty acid production during fermentation of cellulosic substrates by a thermophilic consortium at 50 and 60 °C

► This study focused on the anaerobic metabolism of cellulose by a thermophilic consortium. ► The consortium included Thermoanaerobacter, Clostridium, and Acetivibrio spp. ► The main fermentation products were H2, CO2, ethanol, and acetate formed at 50 or 60 °C. ► ANOVA indicated significant interactions between the cellulose type and temperature. ► These interactions have not been previously recognized for cellulolytic microorganisms.