Combination of expeller and supercritical CO2 for the extraction of a phenolic-rich olive oil – A preliminary chemical characterization
This study aimed to develop and evaluate a sustainable olive oil (OO) extraction process that eliminates wastewater generation while producing high-quality oil and preserving the food-grade potential of byproducts. The method involves olive dehydration followed by a sequential two-step process combi...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/717367 |
| Acceso en línea: | http://hdl.handle.net/10486/717367 https://dx.doi.org/10.1016/j.jiec.2024.12.065 |
| Access Level: | acceso abierto |
| Palabra clave: | Dehydration Expeller Green Technologies Olive Oil Phenolic Compounds Supercritical CO2 Química |
| Sumario: | This study aimed to develop and evaluate a sustainable olive oil (OO) extraction process that eliminates wastewater generation while producing high-quality oil and preserving the food-grade potential of byproducts. The method involves olive dehydration followed by a sequential two-step process combining cold pressing and supercritical CO2 extraction (SFE-CO2). This approach achieved a significantly higher extraction yield (92.6 %) compared to the 2-phase conventional process (37.8 %) while eliminating aqueous residues and avoiding the use of organic solvents or refining steps. A chemical analysis confirmed the extracted OO’s superior quality, with parameters like acid value, peroxide value, absorption coefficients (K232 , K270 , ΔK), and fatty acid profile, meeting legal limits for extra virgin classification. Notably, the absence of water during extraction and the use of SFE-CO significantly enhance the concentration of phenolic compounds (PCs) in the oil, press cake, and defatted f lour. Preliminary analysis revealed PCs such as tyrosol (29 mg/kg), hydroxytyrosol (13 mg/kg), syringic acid (9.6 mg/kg), pinoresinol (1.8 mg/kg), and oleuropein (0.4 mg/kg), representing 3.7–16 times higher levels than those typically found in conventional OO. This method provides a sustainable and efficient alternative for OO extraction, enhancing the oil and byproducts’ nutritional value |
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