The objective of this work was to evaluate the efficiency of hydrogen peroxide in the pre-treatment
of industrial residues Mesocarp + Extruded Peel (Meso + Ext Peel) and extruded Almond (Ext
Almond) from macaúba (Acrocomia aculeata) for the production of 2g ethanol. The concentrations
of neutral detergent fiber, acid detergent fiber, lignin, hemicellulose and cellulose in the biomass
before pretreatments were quantified. The treatments evaluated were the effects of pre-treatments
with alkaline hydrogen peroxide (H2O2, 5% v/v) and with distilled water (H2O2), on the fibrolytic
and amylolytic enzymatic hydrolysis coefficients of the biomasses (Meso + Ext Peel and Almond
Ext) from Macaúba. The pre-treatment residue underwent enzymatic hydrolysis and later the
estimation of the potential for ethanol production was performed by the glucose concentration
obtained after hydrolysis, using the Gay-Lussac equation. The effects of pre-treatment with H2O2
on Meso + Peel Ext and Almond Ext biomass influenced the increase in the fiber enzymatic
hydrolysis coefficient. In the starch hydrolysis, there was no significant difference between the pre-
treatments. In this hydrolysis, precipitation of material occurred, thus verifying a negative effect
on its coefficient. The increase in the fiber hydrolysis coefficient did not result in significant
availability of free glucose in the wort, given the reduced levels of hydrolysable cellulose found in
both biomasses. Therefore, submitting them to the process of obtaining ethanol may not be the best
way.
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