Acid Hydrolysis of Lignocellulosic Materials for the Production of Second Generation Ethanol

Brazil is one of the countries with the largest agricultural production in the world. Therefore, it is capable of generating large amounts of agro-industrial waste that can be used as biomass for the production of biofuels. The objective of the present work was to study the effect of hydrolysis in different types of lignocellulosic residues and the production of 2G ethanol. The acid concentration that released the highest content of fermentable sugars was 5.0%. The material that showed the highest sugar release after acid hydrolysis was cassava residues, with 131.09 g.L^-1 of reducing sugars. The largest production of 2G ethanol was from the hydrolyzate of soybean hulls, of 47.70 g.L^-1 of ethanol and showed productivity of 5.96 g.L^-1.h^-1.