Eficiência do método de sacarificação simultânea à Fermentação (SSF) na produção de etanol e coproduto de raízes de genótipos de batata-doce

Abstract

Brazil is considered one of the countries that has the best conditions for sustainable production of ethanol. Thus, there is a need for studies that seek to find new ways to use raw materials in the market for biofuels. The sweet potato has great energetic potential and can be used directly for the production of ethanol. The objective of this study was to evaluate the method SSF (Simultaneous Saccharification of Fermentation) and the production of ethanol and co-product from different sweet potato genotypes. The experiment was conducted in automated processing micro-plant for ethanol production from sweet potato in the Laboratório de Sistema de Produção de Energia a partir de Fontes Renováveis (LASPER), located in the experimental area of the Federal University of Tocantins, Campus Palmas-TO. Were evaluated the yield (L t-1) and productivity (L ha-1) of ethanol and its physical and chemical characteristics according to ANP Resolution nº 7/2011 and evaluated the content and productivity of crude protein of coproduct from the distillation. Fermentation lasted for on average 22 hours and 03 minutes, which represents a decrease of 8.3% compared to the traditional method. Duda is the genotype which has the greatest ethanol yield, and ethanol productivity: 144,20 L t-1 e 9.445,17 L ha-1, respectively. The physical and chemical characteristics of ethanol produced, have values within the established by the ANP. In relation to crude protein of co-product, Barbara genotype has a higher content (23.19%) and genotype Duda has better productivity (1,148 ton ha-1).