Examinando por Autor "Castro-Galiano, Eulogio"
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Ítem Biorefinery based on olive biomass. State of the art and future trends(Elsevier, 2014-03-25) Romero-García, Juan Miguel; Niño, Luis; Martínez-Patiño, José Carlos; Álvarez-Vaquerizo, Cristina; Castro-Galiano, Eulogio; Negro, María JoséWith currently more than nine million hectares, olive tree cultivation has spread worldwide, table olives and olive oil as the main products. Moreover, a number of by-products and residues derived from both tree cultivation and the process of industrial olive oil production, most having no practical applications, are obtained yearly. This paper reviews the research regarding these by-products, namely biomass from olive tree pruning, olive stones, olive pomace and wastewaters obtained from the process of olive oil production. Furthermore, a wide range of compounds has been identified and can be produced using a broad definition of the term biorefinery based on olive tree biomass. As an example, this paper reviews ethanol production as one of the main proposed applications, as well as research on other value-added products. Finally, this paper also assesses recent technological advances, future perspectives and challenges in each stage of the process.Ítem Engineering aspects of hydrothermal pretreatment: From batch to continuous operation, scale-up and pilot reactor under biorefinery concept(Elsevier, 2020) Ruiz-Leza, Héctor; Conrad, Marc; Sun, Shao-Nin; Sánchez-Carmona, Arturo; De Moraes Rocha, George J.M.; Romaní, Aloia; Castro-Galiano, Eulogio; Torres-Rippa, Ana; Rodríguez-Jasso, Rosa M.; Pires-Andrade, Liliane; Smirnova, Irina; Sun, Run-Cang; Meyer, Anne S.Different pretreatments strategies have been developed over the years mainly to enhance enzymatic cellulose degradation. In the new biorefinery era, a more holistic view on pretreatment is required to secure optimal use of the whole biomass. Hydrothermal pretreatment technology is regarded as very promising for lignocellulose biomass fractionation biorefinery and to be implemented at the industrial scale for biorefineries of second generation and circular bioeconomy, since it does not require no chemical inputs other than liquid water or steam and heat. This review focuses on the fundamentals of hydrothermal pretreatment, structure changes of biomass during this pretreatment, multiproduct strategies in terms of biorefinery, reactor technology and engineering aspects from batch to continuous operation. The treatise includes a case study of hydrothermal biomass pretreatment at pilot plant scale and integrated process design.Ítem Estudio del pretratamiento con agua caliente en fase líquida de la paja de trigo para su conversión biológica a etanol(Jaén : Universidad de Jaén, 2014) Pérez-Jiménez, José Antonio; Castro-Galiano, Eulogio; Manzanares-Secades, Paloma; Ballesteros-Perdices, Ignacio; Universidad de Jaén. Departamento de Ingeniería Química, Ambiental y de los Materiales[ES]Este trabajo está enmarcado en el campo de la investigación para la producción de combustibles líquidos a partir de biomasa (biocombustibles), que surge como alternativa a la utilización de combustibles de origen fósil en el sector transporte. Aunque en los últimos años se han conseguido avances significativos en el desarrollo de tecnologías de producción de biocombustibles líquidos, el elevado coste de las materias primas que se utilizan actualmente para su producción, ligadas al mercado alimentario, hace que no sean competitivos. En este contexto, la utilización de materias primas lignocelulósicas, como por ejemplo la paja del cereal, se vislumbra como una de las opciones más prometedoras para la obtención de bioetanol combustible a bajo coste.Ítem Hepatopreventive properties of hydroxytyrosol and mannitol-rich extracts obtained from exhausted olive pomace using green extraction methods(Royal Society of Chemistry, 2022-12-25) Contreras, María del Mar; Gómez -Cruz, Irene; Feriani, Anouar; Alwasel, Saleh; Harrath, Abdel Halim; Romero-Pulido, Inmaculada; Castro-Galiano, Eulogio; Tlili, NizarExhausted olive pomace (EOP) is produced in olive-pomace oil extractors as a by-product. However, the obtention of bioactive compounds from EOP can reinsert it into the economy as a new bioresource before applying other exploitation ways. The objective of the present study was to investigate the phytochemical differences between aqueous and aqueous acetonic extracts from EOP (AE-EOP and AAE-EOP, respectively) obtained by hydrothermal and ultrasound-assisted extraction, respectively. The in vitro antioxidant activities and the in vivo hepatopreventive potential were evaluated. Using RP-HPLC–ESI–QTOF– MS, the chemical profile revealed that AE-EOP and AAE-EOP showed similar qualitative profiles, with some quantitative differences. Hydroxytyrosol and mannitol were the major compounds of the extracts. The investigation of antioxidant properties in vitro highlighted that AE-EOP was slightly more efficient in scavenging DPPH, ABTS, superoxide, and hydrogen peroxide radicals, when compared to AAE-EOP. Additionally, AE-EOP and AAE-EOP showed dose-dependent suppressive effects on pancreatic lipase activity. In vivo studies showed that AE-EOP and AAE-EOP presented interesting hepatopreventive capacities against CCl4 induced liver injury, as evidenced by (i) the preventive effects against DNA damage, (ii) the normalised hepatic biomarker parameters (ALT, AST, GGT, and LDH) and (iii) the normalised lipid profile (LDL-C, TC, TG, and HDL-C) through diminishing their levels, (iv) which was supported by Oil Red O analysis. Furthermore, AE-EOP and AAE-EOP reduced the oxidative stress in liver tissue by inhibiting lipid peroxidation together with the enhancement of the hepatic antioxidant activities (CAT, SOD and GPx) and GSH content. Additionally, AE-EOP and AAE-EOP exhibited an antifibrotic effect, which was clearly demonstrated by the histopathological examination using Picrosirius red staining. The obtained results support the use of EOP extracts in industries without further purification as antioxidants and against free radical induced damage.Ítem Hidrólisis y fermentación de residuos de tallos de girasol(Jaén : Universidad de Jaén, 2004) Ruiz-Ramos, Encarnación; Sánchez-Villasclaras, Sebastián; Castro-Galiano, Eulogio; Universidad de Jaén. Departamento de Ingeniería Química, Ambiental y de los MaterialesÍtem High Solids Loading Pretreatment of Olive Tree Pruning with Dilute Phosphoric Acid for Bioethanol Production by Escherichia coli(American Chemical Society, 2015-02-26) Martínez-Patiño, José Carlos; Romero-García, Juan Miguel; Ruiz-Ramos, Encarnación; Oliva, José Miguel; Álvarez-Vaquerizo, Cristina; Romero-Pulido, Inmaculada; Negro, María José; Castro-Galiano, EulogioThis paper deals with a new approach for using olive tree pruning biomass as raw material for ethanol and other chemical production. This process includes a water extraction step, followed by a high solids loading dilute phosphoric acid pretreatment and an ethanologenic Escherichia coli fermentation for the conversion of all of the sugars released. Results show that the operational conditions leading to the maximal hemicelullosic sugar recovery in the liquid fraction (near 70%) are 170 °C and 0.5% (w/v) phosphoric acid concentration. The fermentation of the mixed sugars found in the detoxified prehydrolysates by ethanologenic E. coli MS04 led to an ethanol concentration of 23 g/L and an ethanol yield of 0.46 g of ethanol/g of sugars consumed. When the ethanol production from the pretreated solids after enzymatic hydrolysis is also taken into account, 13.2 g of ethanol/100 g of original material was obtained. The production of other interesting compounds is also considered.Ítem Simulación y valorización de residuos de la industria oleícola en la producción cerámica(Jaén : Universidad de Jaén, 2015-10-09) De-la-Casa-Hernández, José-Antonio; Castro-Galiano, Eulogio; Universidad de Jaén. Departamento de : Ingeniería Química, Ambiental y de los Materiales[ES] Los principales residuos generados en la obtención de aceite de oliva son agua del lavado de aceite y alperujo. Adicionalmente, se producen cenizas de alperujo en industrias afines. El trabajo de investigación estudia la valorización de estos residuos en la industria cerámica. Las composiciones ensayadas se han moldeado en extrusora de laboratorio y cocido en horno eléctrico de laboratorio y adicionalmente en horno túnel para las composiciones con agua de lavado y alperujo. La adición de residuos de la industria oleícola modifica ciertas características de los productos obtenidos y variables de operación de la planta. Los nuevos valores de las variables de operación están dentro de los rangos de trabajo. El ahorro energético y de materias primas minerales, la reducción de emisiones de CO2, la eliminación de materiales contaminantes y la obtención de productos que satisfacen los requisitos de calidad fomentan la valorización de estos residuos en productos cerámicos.