| Title | A green approach to phenolic compounds recovery from olive mill and winery wastes |
|---|---|
| ID_Doc | 25978 |
| Authors | Tapia-Quiros, P; Montenegro-Landivar, MF; Vecino, X; Alvarino, T; Cortina, JL; Saurina, J; Granados, M; Reig, M |
| Title | A green approach to phenolic compounds recovery from olive mill and winery wastes |
| Year | 2022 |
| Published | |
| Abstract | ventional solid-liquid extraction (SLE) using water as the extraction solvent. The studied variables were extraction time (5-15 min), temperature (25-90 degrees C), solid-to-liquid ratio (1:10-1:100 (kg/L)), pH (3-10) and application of multiple extractions (1-3). The extraction efficiency was evaluated in terms of total phenolic content (TPC), determined by high performance liquid chromatography (HPLC-UV), but also from the recovery of some representative phenolic compounds. The optimized conditions were one extraction step, 10 min, 25 degrees C, 1:30 (kg/L), pH 5 for olive pomace, and one extraction step, 10 min, 70 degrees C, 1:100 (kg/L), pH 5 for winery residues. The extraction method is simple and suitable for scaling-up in industry, and the aqueous extracts are fully compatible with further purification schemes based on the use of membranes or resins. The optimized technique was applied to a set of different representative residues from olive mill and winery industries, to assess their suitability as sources for phenolic compounds recovery. The phenolic content in the extracts was evaluated by chromatographic analysis and by the Folin-Ciocalteu assay (FC). Furthermore, the antioxidant capacity was determined by 2,2-azinobis-3-etilbenzotiazolina-6-sulfonat (ABTS), 2,diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays. Because of their high contents in phenolic compounds and great antioxidant capacity, olive pomace and lees filters were identified as especially suited sources for phenolic compounds recovery. |
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