Fig. 14

Fermentation process yields of DDR poplar (Pop). All the glucose and xylose were consumed and the fermentation process yields were near the maximum, greater than 45% except for Pop DDR (100/240/0.001) and Pop DDR (100/240/0.005) which ranged from 35–40%. The high fermentation process yields for DDR poplar are similar to DDR corn stover. X/Y/Z represents NaOH conc (g/kg)/residence time (min)/disc-refining gap (in.)