Figure 7.

Dilute acid pretreatment using 2% w/w sulfuric acid with 2.0% w/w solids concentration. Glucose and xylose yields for co-hydrolysis compared with separate pretreatment and enzymatic hydrolysis (SPEH) for pretreatment of 2% w/w Populus slurries in 2% w/w sulfuric acid at 140°C followed by enzymatic hydrolysis over a range of enzyme loadings according to the same format as in Figure 6. The error bars represent the standard errors, based on three replicates.