Fig. 1 shows the effect of different pretreatments on the amount of glucose and xylose released from unwashed and washed biomass after 72 h of enzymatic hydrolysis. Glucose and xylose yields were calculated as the percentage of cellulose or hemicellulose present in the initial hydrolysis material.
Glucose and xylose concentrations in the hydrolysates were higher than those of the control (RM) for all the experiments, except for xylose concentration in hydrolysates from dilute-acid pretreatment, due to high xylose solubilisation during this pretreatment.