Fig. 12

Fermentation process yields of DDR corn stover (CS). The maximum theoretical yield for glucose and xylose to 2,3-BDO and acetoin is 50%. All the glucose and xylose were consumed and the fermentation process yields were near the maximum, greater than 45%. The lack of inhibitors presents during fermentation allowed for high fermentation process yields. X/Y/Z represents NaOH conc (g/kg)/residence time (min)/disc-refining gap (in.)