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      Study of liquor from hemicelluloses separation process in black carob tree sawdust biorefinery Translated title: Estudio del proceso de separación del licor de hemicelulosas en la biorrefinería de aserrín de algarrobo negro.

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          Abstract

          Abstract This research work utilized pretreated black carob tree sawdust as raw material, a vastly found waste in the Northeast Argentinian region and its objective was to optimize the third stage of a biorefinery process. The acid pretreatment in biorefinery processes was used to extract the maximum quantity of hemicelluloses, to retain the highest cellulose concentration in the pretreated solid and to prevent degradation of sugars contained in the process liquor. Using a central composite design of experiments optimization of hemicellulose extraction of partially-delignified washed black carob tree sawdust was achieved. Results from the central composite design of experiments, with two repetitions of the central point, have shown that it is possible to obtain liquor yielding 2.9% Solubilized glucose, 54.5% Solubilized xylose, and 0.3% degraded xylose, by an optimal process using 1.5% H2SO4, 7.7% solids for 15.0 min.

          Translated abstract

          Resumen Este trabajo de investigación utilizó como materia prima aserrín de algarrobo negro pretratado, residuo abundante en la región del Nordeste Argentino y su objetivo fue optimizar la tercera etapa de un proceso de biorrefinería. El pretratamiento ácido en los procesos de biorrefinería se utilizó para extraer la máxima cantidad de hemicelulosas, retener la mayor concentración de celulosa en el sólido pretratado y evitar la degradación de los azúcares contenidos en el licor de proceso. Usando un diseño de experimentos central compuesto, se logró la optimización de la extracción de hemicelulosa de aserrín de algarrobo negro lavado parcialmente deslignificado. Los resultados del diseño central compuesto, con dos repeticiones del punto central, han demostrado que es posible obtener licor con un rendimiento de 2,9 % de glucosa solubilizada, 54,5 % de xilosa solubilizada y 0,3 % de xilosa degradada, mediante un proceso óptimo utilizando 1,5 % de H2SO4, 7,7 % de sólidos durante 15,0 min.

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          Most cited references23

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          Reviving the carbohydrate economy via multi-product lignocellulose biorefineries.

          Before the industrial revolution, the global economy was largely based on living carbon from plants. Now the economy is mainly dependent on fossil fuels (dead carbon). Biomass is the only sustainable bioresource that can provide sufficient transportation fuels and renewable materials at the same time. Cellulosic ethanol production from less costly and most abundant lignocellulose is confronted with three main obstacles: (1) high processing costs (dollars /gallon of ethanol), (2) huge capital investment (dollars approximately 4-10/gallon of annual ethanol production capacity), and (3) a narrow margin between feedstock and product prices. Both lignocellulose fractionation technology and effective co-utilization of acetic acid, lignin and hemicellulose will be vital to the realization of profitable lignocellulose biorefineries, since co-product revenues would increase the margin up to 6.2-fold, where all purified lignocellulose co-components have higher selling prices (> approximately 1.0/kg) than ethanol ( approximately 0.5/kg of ethanol). Isolation of large amounts of lignocellulose components through lignocellulose fractionation would stimulate R&D in lignin and hemicellulose applications, as well as promote new markets for lignin- and hemicellulose-derivative products. Lignocellulose resource would be sufficient to replace significant fractionations (e.g., 30%) of transportation fuels through liquid biofuels, internal combustion engines in the short term, and would provide 100% transportation fuels by sugar-hydrogen-fuel cell systems in the long term.
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            Redefining biorefinery: the search for unconventional building blocks for materials.

            This review discusses different strategies for the upgrading of biomass into sustainable monomers and building blocks as scaffolds for the preparation of green polymers and materials.
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              Optimization of Hydrothermal Pretreatment of Hardwood and Softwood Lignocellulosic Residues for Selective Hemicellulose Recovery and Improved Cellulose Enzymatic Hydrolysis

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                Author and article information

                Journal
                reteci
                Tecnología y Ciencia
                Tecnol. cienc.
                Universidad Tecnológica Nacional. Secretaría de Ciencia y Tecnología (Ciudad Autónoma de Buenos Aires, , Argentina )
                1666-6933
                June 2022
                : 44
                : 26-41
                Affiliations
                [1] orgnameUniversidad Tecnológica Nacional orgdiv1FRRe orgdiv2Centro de Investigación en Química Orgánica Biológica Argentina
                Article
                S1666-69332022000200026 S1666-6933(22)00004400026
                10.33414/rtyc.44.26-41.2022
                6efc7959-521f-4e1e-956f-da14b46c688f

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 13 May 2022
                : 14 March 2022
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 23, Pages: 16
                Product

                SciELO Argentina


                black carob tree sawdust,biorrefinería,aserrín algarrobo negro,hidrólisis,hemicelulosas,optimización,biorefinery,hydrolysis,hemicelluloses,optimization

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