Recovery of oils and antioxidants from olive stones

The olive oil industry generates enormous amounts of stones each year, which have the potential to be used as a biofuel but high content, negatively impacts combustion process. In addition, contain high-value antioxidants, and their exploitation can provide additional revenues for industry. this work, we report effect different extraction solvents on antioxidants activity. in vitro gastrointestinal digestion was evaluate content antioxidant activity stone extracts after digestion. obtained by aqueous ethanol solvent (50% vol) exhibited highest with DPPH IC50 1.27 mg mL ?1 ferric reducing power ( FRAP ) 6.33 AAE g . After composed gastric intestinal processes, decreased: value increased three times (a higher indicates lower activity) decreased almost five respect values original extracts. Furthermore, both phenomenological shrinking core models were fit experimental kinetics data showed good agreement. Thermodynamic analysis that process is endothermic irreversible while spontaneous thermodynamically favourable all conditions except from 3.10 mm particle size at 20 °C. calculated temperature coefficient agreement previously reported similar biomass. • Waste source produce valuable chemicals. Aqueous best antioxidants. Antioxidant are affected Both suitable extraction. Oil favourable.