Fruit industries are highlighted by the residue amount and especially, for its composition. Brazil thereby is consolidating as an important grape juice producer, generating a large amount of diverse residues like grape pomace, which corresponds around 20% of total fruit processed. Grape pomace is constituted by seeds and peel and presents rich and heterogeneous composition in phenolic compounds (flavonoids and non flavonoids), reason why it was employed as raw material to obtain a bioactive extract in this study. Enzymatic and ethanolic extractions were evaluated to recover these compounds as they are able for application in food products. Between the evaluated conditions in both experimental design, ethanolic extraction was more efficient for the recovery of bioactive compounds (p<0,01), which extract presented an antioxidant activity of 1.965 µmol Trolox per 100 g of grape pomace, 25% higher than the extract obtained in the better enzymatic extraction (1.580 µmol Trolox per 100 g of grape pomace).
by-products reuse; Vitis sp; phenolic compounds; antioxidants; ethanolic extraction; enzymatic extraction
