Extracción asistida por microondas de compuestos bioactivos del orujillo
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2021-07-08
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Jaén: Universidad de Jaén
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[ES] El orujillo es un residuo que se genera en las extractoras de aceite de orujo y su aprovechamiento industrial es escaso. Por ello, el orujillo se sometió a una extracción asistida por microondas usando agua como disolvente para la obtención de compuestos bioactivos. Se evaluó como afectaba la temperatura (40-100 ºC), tiempo (4-22 min) y carga de sólidos (3-15%, p/v) a la extracción de estos compuestos, incluyendo hidroxitirosol y manitol, y también se determinó la capacidad antioxidante. Posteriormente, se realizó una optimización mediante la metodología de superficie respuesta para maximizar dichas variables de respuesta y se obtuvieron las siguientes condiciones: 100ºC, 16,2 min y 11,7% (p/v). A partir del orujillo extraído, se recuperaron ácidos triterpénicos usando etanol como disolvente. Los resultados indicaron que el orujillo es una fuente de compuestos bioactivos que se pueden extraer secuencialmente, siendo la primera etapa una extracción asistida por microondas con agua como disolvente “verde”.
[EN] Exhausted olive pomace (EOP) is the residue generated in the olive pomace industry and it has limited industrial applications. Therefore, in this work, EOP was subjected to microwave-assisted extraction using water as solvent to obtain bioactive compounds. It was evaluated how the temperature (40-100 ºC), time (4-22 min) and solid load (3-15%, w/v) affected the extraction of these compounds, including hydroxytyrosol and manitol, and the antioxidant capacity was also determined. Subsequently, an optimization was performed using the surface response methodology to maximize the latter response variables and the optimal conditions were obtained: 100 ºC, 16.2 min and 11.7% (w/v). From the EOP extracted solid, triterpenic acids were recovered using ethanol as solvent. The results indicated that EOP is a great source of bioactive compounds, which can be sequentially extracted using an eco-friendly microwave-assisted water extraction as first step.
[EN] Exhausted olive pomace (EOP) is the residue generated in the olive pomace industry and it has limited industrial applications. Therefore, in this work, EOP was subjected to microwave-assisted extraction using water as solvent to obtain bioactive compounds. It was evaluated how the temperature (40-100 ºC), time (4-22 min) and solid load (3-15%, w/v) affected the extraction of these compounds, including hydroxytyrosol and manitol, and the antioxidant capacity was also determined. Subsequently, an optimization was performed using the surface response methodology to maximize the latter response variables and the optimal conditions were obtained: 100 ºC, 16.2 min and 11.7% (w/v). From the EOP extracted solid, triterpenic acids were recovered using ethanol as solvent. The results indicated that EOP is a great source of bioactive compounds, which can be sequentially extracted using an eco-friendly microwave-assisted water extraction as first step.