“…When observing the pH results before and after fermentation, it appears that for the banana pulp there was a slight increase in its value, but within the expected for a discontinuous fermentation process, where there is no cell recirculation (CRUZ, 2022), even so, the range is close to the ideal (4.5 to 5.1), as bacterial proliferation occurs much higher, which will compete with the yeasts for the available fermentable sugars and produce other metabolites such as malic acid , glycerol, not being of interest and making the process unfeasible (FURLANI, 2014). However, when observing the pH of the peel, the change was minimal, which suggests when comparing the alcohol content obtained that fermentation did not occur as expected, since despite having sugars in its constitution (NERIS et al, 2018) the presence of other inhibitory compounds, such as the phenolic compounds present in the husks, can significantly affect ethanol productivity (FURLANI, 2014;PEREIRA, 2014).…”