The results achieved from cellulignin reveal the hemicellulose
influence, since although the increased lignin content in this
sample, the hemicellulose removal favored the enzymes attack,
and consequently the hydrolysis, proportioning a glucose formation
and a cellulose conversion ratio higher than those obtained
from untreated material. The removal of lignin besides hemicellulose
increased even more these results. From cellulose pulp,
the highest values of glucose yield (85.6%) and cellulose conversion
ratio (91.75%) were achieved. Such values were 14.5
and 17.4% higher than those attained from cellulignin, and 280
and 310% higher than those attained from untreated material.
It can be thus concluded that the lower the hemicellulose and
lignin contents in the sample, the better the efficiency of cellulose
enzymatic hydrolysis. However, it is not necessary to
promote a complete removal of these two fractions to achieve
high cellulose conversion ratio during the enzymatic hydrolysis
of cellulose from brewer’s spent grain.