Valorization of pineapple waste for the extraction of bioactive compounds and glycosides using autohydrolysis

Autohydrolysis process, an alternative technology that uses only water as extraction solvent, was evaluated for the extraction of glycosides and polyphenols from pineapple waste. A Box-Behnken design was carried out using different temperatures (150-200 °C), solid-liquid ratio (1:40-1:10 w/v) and reaction time (15-45 min). The best condition for the production of glucose (27.6 g/L) and fructose (33.8 g/L) was 150 °C, 30 min and 1:10 w/v while the highest amount of extracted total polyphenols (1.75 g/L) was obtained at 200 °C, 30 min and 1:10 w/v solid-liquid ratio. In all treatments were detected gallic acid, hydroxybenzoic acid, chlorogenic acid, epicatechin, coumaric acid and caffeic acid. These results indicate autohydrolysis as a valuable alternative for the sustainable extraction of high value-added molecules for further use in industrial, food, cosmetic and health applications.