Mono- and co-culture performance under CBP and SSF conditions. C. phytofermentans mono- and co-culture CBP without added enzyme and SSF with 400 mg/L endoglucanase at 30°C. Performance is shown by ethanol, acetate and accumulated reducing sugar concentrations (A) and cellulose conversion (B). Bars represent the average of two independent experiments and error bars are plus and minus one standard deviation among experiments. C. phy indicates C. phytofermentans mono-culture, cdt-1 indicates S. cerevisiae cdt-1 mono-culture and C. phy + cdt-1 indicates C. phytofermentans/S. cerevisiae cdt-1 co-culture. + Endoglucanase indicates an SSF experiment with endoglucanase added as stated in the text. S. cerevisiae cdt-1 mono-cultures and C. phytofermentans/S. cerevisiae cdt-1 culture were grown with oxygen transfer while C. phytofermentans mono-cultures remained completely anaerobic throughout the experiment.