Valorization of Lyophilized Olive Mill Wastewater: Chemical and Biochemical Approaches

Lipid composition and antioxidant activity have been carried out in order to valorize the of olive mill wastewater extracts with different solvents (supercritical carbon dioxide, n-hexane, dichloromethane ethanol). The was evaluated using ABTS (2,2′-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid)) DPPH (2,2-diphenyl-1-picrylhydrazyl) tests. total phenolics flavonoid contents were, also, determined. chemical extracted oil established, respectively, by gas chromatography–flame ionization detector high-performance liquid chromatography methods. results showed that oleic acid equivalent number forty-eight were major compounds analyzed oils. Residual from Sousse region displayed highest radical-scavenging (31.10 ± 0.10 μg/mL). analysis OMWs n-hexane fraction contained an abundance (61.62%) (53.14%). best determined for ethanol (14.5 final a significant difference variations polar apolar components. Moreover, high percentages Monounsaturated fatty acids (MUFA) 64% largest amount flavonoids (160.30 1.70 mg EQ/g DM).