Variation in the Alcohol Components of Coffea arabica L. Wastewater Distillate Fermented Under Different Conditions
2022
E. Morales, S. Chávez, L. García, A. C. Caetano, J. Veneros, M. Á. Barrena and M. Oliva
Coffee is the second-most consumed beverage in the world, and its high demand is covered by countries such as Peru, where the waste generated in production causes environmental pollution. We sought to determine the concentration of alcohol components and other volatiles compounds present in the distillate, after fermenting wastewater from the first wash in the wet processing of Coffea arabica var. catimor under five conditions: C1 (pasteurized + 0.325 g sucrose + 8.000 g S. cerevisiae), C2 = (pasteurized + 8.000 g S. cerevisiae), C3 (0.325 g sucrose + 8.000 g S. cerevisiae), C4 = (8.000 g S. cerevisiae), and C5 = (natural state). The solid-phase microextraction technique was used to determine the composition of the distillates by gas chromatography (GC). 35 components were detected, 11 of them under all conditions. Ethanol was the most abundant element in all five fermentation conditions. Condition 1 shows the highest value at 97.29 μg.mL-1, though all five concentrations can be considered high. This study shows that wastewater from the wet processing of coffee can have agro-industrial use as a value-added product. Postharvest Peruvian coffee is amenable to strategies aligned with the sustainable development goal of reducing food losses along production and supply chains.
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