HYDROLYSIS OF AGRICULTURAL BIOMASS BY COMBINED PRETREATMENT AND ENZYMATIC METHODS IN ORDER TO PRODUCE BIOFUELS (ETHANOL, BIOGAS)
Keywords:
physical pretreatment, enzymatic hydrolysis, biomass degradationAbstract
The use of energy crops (maize straw, wheat straw, barley straw etc.) as substrate
for renewable energy production (e.g. biogas) is more efficient when it is degraded
by different hydrolysis methods. However, fibers contained inside energy crops (e.g.
cellulose and hemicellulose) are only hardly and slowly degraded by anaerobic
bacteria. The slow degradation of these substances can decrease the methane yields
of agricultural biogas plants.In the present study, we investigated the efficiency of
combined pretreatment (different concentrations H2SO4 + 30 minutes at 1210
C)
followed to enzymatic hydrolysis. Testing different concentration of H2SO4, good
results were obtained for maize whole crop when we used combined pretreatment
(3% H2SO4 + 30 minutes at 1210
C) followed to enzymatic hydrolysis (3.9 fold
higher) and for Gavott Maize Straw when we used combined pretreatment (2%
H2SO4 + 30 minutes at 1210
C) followed to enzymatic hydrolysis (3.6 fold higher)
comparing with untreated samples.
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