Phenolic Compounds from Irradiated Olive Wastes: Optimization of the Heat-Assisted Extraction Using Response Surface Methodology

Olive pomace, an environmentally detrimental residue generated during olive oil extraction, contains bioactive compounds in demand by the food industry. To valorize this waste product a suitable yield for extraction process is required. Heat-assisted of from pomace was optimized circumscribed central composite design and response surface methodology. Our previous studies indicated that irradiation could improve 2.4-fold extractability main phenolic pomace. The effect time, temperature solvent concentration on polyphenols irradiated at 5 kGy tested. Hydroxytyrosol-1-?-glucoside, hydroxytyrosol, tyrosol caffeic acid were quantified High Performance Liquid Chromatography to calculate total polyphenol content. optimal general conditions RSM modeling time 120 min, 85 °C, 76% ethanol water. Using these selected conditions, 19.04 ± 1.50 mg/g dry weight, 148.88 8.73 extract obtained, representing 13.7%, which consistent with value predicted model. This work demonstrated potential residues industry as alternative obtain be used ingredients