Enhanced Bioethanol Production from Blue Agave Bagasse in a Combined Extrusion–Saccharification Process

Montiel, Carmina; Hernández-Meléndez, Óscar; Vivaldo‐Lima, Eduardo; Hernández-Luna, Martín; Bárzana, Eduardo

doi:10.1007/s12155-016-9747-x

Cited by 32 publications

(27 citation statements)

References 32 publications

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“…8, from the Raw BAB blank sample shown there, that saccharification yield is increased more than twice with the NaOH extrusion pretreatment. These results have been further ratified with additional saccharification experiments carried out in our group [15,37].…”

Section: Saccharification Potential Of Pretreated Bab Samplessupporting

confidence: 66%

Characterization of Blue Agave Bagasse (BAB) as Raw Material for Bioethanol Production Processes by Gravimetric, Thermal, Chromatographic, X-ray Diffraction, Microscopy, and Laser Light Scattering Techniques

et al. 2016

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A detailed characterization of the main types of blue agave bagasse (BAB) obtained from the four largest tequila factories in the State of Jalisco (Mexico) is presented here. After milling/sieving the agave bagasses, two particle size fractions were identified, one rich in fibers and the other consisting of dust/fine particles. Both fractions were analyzed to determine the content of cellulose, hemicellulose, lignin, organic-soluble compounds, absorbed remaining sugars, minerals, and organic matter. After detailed analyses of both fractions by wet, thermal (thermo-gravimetric analysis (TGA)/differential thermo-gravimetric analysis (DTA)), and other methods (high-performance liquid chromatography (HPLC), microscopy, particle size by laser diffraction light scattering, and crystallinity by X-ray diffraction), a moderate-to-intensive method was devised for further processing the fibrous fraction, which had a high crystalline cellulose content, as well as for its subsequent enzymatic saccharification under welldefined moderate conditions. Alternative processing options were also devised for the dust/fine particle fraction, which has a moderate crystalline cellulose that is rich in adsorbed sugars and that has a high mineral matter content.

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Section: Saccharification Potential Of Pretreated Bab Samplessupporting

confidence: 66%

Characterization of Blue Agave Bagasse (BAB) as Raw Material for Bioethanol Production Processes by Gravimetric, Thermal, Chromatographic, X-ray Diffraction, Microscopy, and Laser Light Scattering Techniques

et al. 2016

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“…For instance, cellulose concentration increased under mild extrusion conditions in blue agave bagasse (50°C, 85 rpm screw speed). In contrast, refined wheat straw decreased its cellulose content (50°C, 150 rpm screw speed) under aqueous extraction (Jacquemin et al, 2015;Montiel, Hernández-Meléndez, Vivaldo-Lima, Hernández-Luna, & Bárzana, 2016). Thus, these reports suggest that cellulose extraction output will depend on the adequate combination of extrusion conditions and the pretreatments suffered by the vegetable fiber.…”

Section: Cellulosementioning

confidence: 96%

“…Then, hydrogen bonding within microfibrils confers its mechanical strength, chemical and biological resistance to degradation (Dhingra, Michael, Rajput, & Patil, 2012). As Montiel et al (2016) observed in the SEM analyses, extrusion processing may provide the shear force and temperature necessary to disrupt the cellulose structure of cell-walls, promoting its release and finally increasing availability for further enzymatic hydrolysis.…”

Section: Cellulosementioning

confidence: 96%

“…Likewise, authors also observed an increase in lignin (24.56 to 25.80% DW) and cellulose (42.17 to 44.34% DW), though hemicellulose decreased (25.09 to 21.46% DW), which is consistent with our results. Hemicellulose is a heteropolymer composed by shorter ramifications of sugars (xylose, galactose, mannose, and arabinose) more prone to degradation via chemical or enzymatic hydrolysis (Dhingra et al, 2012;Montiel et al, 2016). Thus, the absence of hemicellulose in wounding stress treated carrots may be explained as the up-regulation of transcription factors through incubation to diminish moisture loss, increasing cellulose deposition on the cell-wall but decreasing hemicellulose levels.…”

Section: Hemicellulosementioning

confidence: 99%

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Combined application of wounding stress and extrusion as an innovative tool to obtain carrot powders with modified functional properties

Viacava

Santana-Gálvez

Heredia‐Olea

et al. 2019

CyTA - Journal of Food

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Wounding stress induces the accumulation of phenolics in carrots. However, its effect on cell-wall constituents has not been studied. Extrusion generates modifications in high-fiber food matrices. In this study, the combined effect of wounding stress and extrusion on cell-wall constituents and functional properties of carrots was evaluated. Wounding stress was applied by shredding carrots and storing the tissue (48 h/15°C). The stressed tissue (wounding stress carrot, WSC) was dehydrated and then extruded at temperature, 60 or 100°C, and screw configuration, continuous or expansion. Extrudates were milled and analyzed for cell-wall constituents and other physicochemical parameters. Cellulose content increased (112%) as a response to wounding. Furthermore, extrudates obtained from WSC showed higher content of cell-wall components. For instance, insoluble and total lignin content increased (54-84%) with extrusion conditions. Furthermore, WSC showed higher oil absorption index and lower water solubility index (WSI); whereas extrudates showed the highest WSI.Aplicación combinada del estrés de corte y extrusión como una herramienta innovadora para obtener polvos de zanahoria con propiedades funcionales modificadas RESUMEN El estrés de corte induce la acumulación de compuestos fenólicos en zanahoria. Sin embargo, su efecto sobre los constituyentes de la pared celular no se ha estudiado. La extrusión genera modificaciones en matrices alimenticias con alto contenido de fibra. En este estudio, el efecto combinado del estrés de corte y la extrusión sobre los constituyentes de la pared celular y las propiedades funcionales de la zanahoria transformada en harina se evaluaron. El estrés de corte se aplicó en zanahorias produciendo ralladuras y almacenándolas (48 h a 15°C). El tejido estresado (zanahorias tratadas con estrés de corte, ZEC) se deshidrataron y después se extruyeron a temperaturas de 60 o 100°C, y configuración de tornillo, continua o expansión. El tejido extrudido se molió y se analizaron los componentes de la pared celular y otros parámetros físicos y químicos. El contenido de celulosa se incrementó (112%) como respuesta del estrés de corteo. Asimismo, el tejido extrudido obtenido de ZEC mostró mayor contenido de componentes de pared celular. Por ejemplo, la lignina soluble e insoluble se incrementó (54-84%) con las condiciones de extrusión. Adicionalmente, ZEC mostró mayor contenido de capacidad de retención de aceite y menor índice de solubilidad en agua; mientras que los extrudidos mostraron mayor índice de solubilidad en agua. ARTICLE HISTORY

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“…Moreover, the use of an enzyme blend increases the yield of fermentable sugars compared with the use of a single enzyme. Montiel et al [17] evaluated the thermo-mechano-chemical process (extrusion pretreatment) and enzymatic saccharification of blue agave bagasse using commercial preparations of enzymes. The results demonstrated that blue agave bagasse can be saccharified efficiently, increasing 73% (69.5 g/L) over the standard process.…”

mentioning

confidence: 99%

Bioenergy Potential, Energy Crops, and Biofuel Production in Mexico

2016

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The negative impact of burning fossil fuels on the global climate, uncertainty over the long-term price of fossil fuelscaused in part by geopolitics and pending decisions on the exploration of oil shale and gas, tar sands and arctic oil reserves, and in part by uncertainty over future regulations on greenhouse gas emissions-and the increasing global demand for energy resulting from population growth and economic development drive the need to deploy renewable energy on a large scale. Mexico is a promising country in the development of renewable energy due to its warm and sunny climate, which supports solar energy generation and crop cultivation throughout the year, and its relative abundance of agricultural land that is suitable for energy crops, but not for food crops, thus minimizing competition between food and energy production. With a well developed infrastructure of roads, ports, and industrial centers, and a relatively low cost of labor, Mexico is among the most relevant emerging bioeconomies.In a recent study, Alemán-Nava et al.[1] reported the current use and future potential of renewable sources in the production of renewable energy, which included solar, hydroelectric, geothermal and wind energy, and bioenergy. However, these alternative sources of energy have not yet been fully exploited in Mexico. According to the Mexican Ministry of Energy (SENER) and the National Energy Balance databases [2], in 2014, Mexico produced 8826 PetaJoule (PJ = 10 15

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Enhanced Bioethanol Production from Blue Agave Bagasse in a Combined Extrusion–Saccharification Process

Cited by 32 publications

References 32 publications

Characterization of Blue Agave Bagasse (BAB) as Raw Material for Bioethanol Production Processes by Gravimetric, Thermal, Chromatographic, X-ray Diffraction, Microscopy, and Laser Light Scattering Techniques

Characterization of Blue Agave Bagasse (BAB) as Raw Material for Bioethanol Production Processes by Gravimetric, Thermal, Chromatographic, X-ray Diffraction, Microscopy, and Laser Light Scattering Techniques

Combined application of wounding stress and extrusion as an innovative tool to obtain carrot powders with modified functional properties

Bioenergy Potential, Energy Crops, and Biofuel Production in Mexico

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