Influência do magnésio nos processos fermentativos de resíduos hidrolisados da cultura da bananeira

Abstract

With the advent of global warming and the depletion of oil reserves, further studies have been carried out on the use of alternative sources of energy, particularly those derived from biomass. Ethanol, produced from different renewable feedstocks (saccharin, amylaceous or cellulosic sources) is an alternative fuel for explosion engines. The different processes for the ethanol production have a large production cost variation, where the raw material is a strong factor to increase costs. In this context, the present work sought to evaluate the lignocellulosic residues of the banana tree, its glucose production through enzymatic hydrolysis and its behavior during fermentation through the addition of magnesium and aluminum. The different residues studied (pseudostem and banana leaf) obtained high levels of glucose (73.24 and 79.75 g/L, respectively), demonstrating the potential of these materials for the production of ethanol. In the fermentation, there were significant differences in the addition of magnesium and aluminum, showing that magnesium raised the ethanol production in 24% and that aluminum generated a reduction of 10% in production, however, there were no significant differences in the interaction between minerals, which means that magnesium failed to suppress the toxic effect caused by aluminum.