Processo de obtenção de etanol por hidrólise enzimática do bagaço do pedúnculo do caju (Anacardium Occidentale L.).

Abstract

The agro-industrial residues are abundant and can be availed as substrates for biotechnological processes for production of high added value. In Brazil there are many residues, such as bagasse from cashew apple and sugar cane, however, that the bioconversion takes place these materials requires a treatment of acidic or enzymatic hydrolysis. The enzymatic hydrolysis process requires the development of micro-organisms capable of breaking the cellulose ferment sugar andproduce ethanol. This study aimed to explore the process of conversion of cellulose into fermentable sugars (glucose) using as source of biomass bagasse from cashew apple bagasse and cane sugar comparing their efficiency in the process. factorial designs 23 were performed to evaluate the concentration of H2SO4or H3PO4, time of pre-treatment and cellulase activity in (FPU). The best values that influenced the concentration of glucose in the enzymatic hydrolysis liquor were for treatments using 7 FPU of cellulase in 24 hours forthe cashew apple pomace and 48 hours for the bagasse from sugar cane. Where it could be concluded that also for a 90% efficiency of alcoholic fermentation, and the objective function with the maximum% conversion of sugar to ethanol, one should operate the fermentation in yeast concentration levels at the midpoint (10g / L), nitrogen source (0.6 g / L) and phosphorus source (0.12g / L). For productivity was observed significant effects of variables and found that the model is statistically significant where the maximum value was observed at around 2 g / L h.