Influence of aluminum and magnesium in fermentation processes of hydrolized wastes of the banana tree for ethanol production
Abstract
Different processes in ethanol production has wide cost variations. Prime matter and the fermentation medium are a strong factor in production yield. Current assay evaluates the productivity of ethanol from hydrolyzed lignocellulose residues of the banana tree with the addition of different concentrations of magnesium and aluminum in the fermentation must. The banana tree´s pseudo-stem (PC) and the leaf mass were used. Wastes underwent pretreatment intercalated between base and acid and, afterwards, enzymatic hydrolysis of the solid fraction was performed. Fermentation assay was composed of two concentrations of aluminum sulfate (0, 50, 100 mg.L-1) and 3 concentrations of magnesium oxide (0, 1, 2 and 3 mg.L-1), with 10 ml of hydrolyzed must. Assay design was totally randomized with 3 replications. Different wastes under analysis (PC and MF) had high glucose rates (73.24 and 79.75 g.L-1 respectively), and showed the capacity of the material for ethanol production. There were significant differences in fermentation in the addition of magnesium and aluminum. Magnesium is capable of raising ethanol production up to 24% whilst aluminum may generate a reduction of 10% in production. However, there were no significant differences in the minerals´ interaction, or rather, magnesium did not suppress the toxic effect caused by aluminum.References
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