Oligosaccharides and sugars production from olive stones by autohydrolysis and enzymatic hydrolysis

Cuevas, Manuel Bruña; García, J.; Hodaifa, Gassan; Sánchez, Sebastián

doi:10.1016/j.indcrop.2015.03.011

Cited by 32 publications

(28 citation statements)

References 27 publications

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“…Due to these easily changed proprieties, catalysts used in the LHW process are hydronium ions generated by autoionization of water that act as a promoter of cleavage of Ο‐acetyl and uronic acid substitutions of the hemicellulose structure, resulting in the production of acetic and other organic acids . The release of these acids catalyzes the hydrolysis of linkages between hemicellulose and lignin, and the hemicellulose fraction is hydrolyzed into soluble oligosaccharides in a high yield . Simultaneously, LHW produces a solid material rich in cellulose and lignin, which is highly susceptibility to further enzymatic processes .…”

Section: Pretreatment Of Lignocellulosic Biomassmentioning

confidence: 99%

“…LHW has been shown to remove up to 84 % of hemicellulose and enhance enzymatic hydrolysis of a wide range of raw materials, such as corn stover, olive stones, and sugarcane bagasse . In the field of biomass pretreatment, combined technologies have exhibited a synergistic effect on the recovery of hemicellulose‐derived sugars and enzymatic conversion of sugars.…”

Section: Pretreatment Of Lignocellulosic Biomassmentioning

confidence: 99%

“…The hydrolysis of hemicellulose in sub‐/supercritical water has not been studied as extensively as that of cellulose because hemicellulose is much more susceptible to hydrolysis than cellulose and starts to depolymerize at temperatures between 150 and 220 °C . This process has been mainly investigated by using batch reactors at temperatures up to 230 °C and holding times of a few minutes . According to Bobleter, hemicellulose is highly hydrolyzable at temperatures above 180 °C .…”

Section: Pretreatment Of Lignocellulosic Biomassmentioning

confidence: 99%

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Current Pretreatment Technologies for the Development of Cellulosic Ethanol and Biorefineries

et al. 2015

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Lignocellulosic materials, such as forest, agriculture, and agroindustrial residues, are among the most important resources for biorefineries to provide fuels, chemicals, and materials in such a way to substitute for, at least in part, the role of petrochemistry in modern society. Most of these sustainable biorefinery products can be produced from plant polysaccharides (glucans, hemicelluloses, starch, and pectic materials) and lignin. In this scenario, cellulosic ethanol has been considered for decades as one of the most promising alternatives to mitigate fossil fuel dependence and carbon dioxide accumulation in the atmosphere. However, a pretreatment method is required to overcome the physical and chemical barriers that exist in the lignin–carbohydrate composite and to render most, if not all, of the plant cell wall components easily available for conversion into valuable products, including the fuel ethanol. Hence, pretreatment is a key step for an economically viable biorefinery. Successful pretreatment method must lead to partial or total separation of the lignocellulosic components, increasing the accessibility of holocellulose to enzymatic hydrolysis with the least inhibitory compounds being released for subsequent steps of enzymatic hydrolysis and fermentation. Each pretreatment technology has a different specificity against both carbohydrates and lignin and may or may not be efficient for different types of biomasses. Furthermore, it is also desirable to develop pretreatment methods with chemicals that are greener and effluent streams that have a lower impact on the environment. This paper provides an overview of the most important pretreatment methods available, including those that are based on the use of green solvents (supercritical fluids and ionic liquids).

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Section: Pretreatment Of Lignocellulosic Biomassmentioning

confidence: 99%

Section: Pretreatment Of Lignocellulosic Biomassmentioning

confidence: 99%

Section: Pretreatment Of Lignocellulosic Biomassmentioning

confidence: 99%

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Current Pretreatment Technologies for the Development of Cellulosic Ethanol and Biorefineries

et al. 2015

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“…Glycosides obtained from these residues have various applications as food additives, prebiotics and biopreservatives (Cuevas, García, Hodaifa, & Sánchez, 2015). Moreover, phenolic compounds are of great interest in the pharmaceutical and food industry due to their biological properties with application on human health.…”

Section: Introductionmentioning

confidence: 99%

Valorization of pineapple waste for the extraction of bioactive compounds and glycosides using autohydrolysis

Sepúlveda

Romaní

Aguilar

et al. 2018

Innovative Food Science & Emerging Technologies

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“…Hydrothermal pretreatment (hot water treatment or autohydrolysis) is widely used to extract hemicelluloses from biomass for producing fermentable sugars and oligosaccharides (Ertas et al 2014;Batalha et al 2015;Cuevas et al 2015). This method is a simple, low-cost, and attractive technology for extracting lignocelluloses in the kraft pulping (Deb et al 2016), soda, soda-anthraquinone, and soda ethylenediamine processes for producing dissolving pulp (Jahan 2009;Borrega et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on the Yield and Characterization of Hemicelluloses Isolated with Hydrothermal Extract and Catalyzed by Acetic Acid from Acacia Wood

et al. 2017

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aTo utilize hemicelluloses from biomass as a feedstock to produce various value-added products, the soluble hemicelluloses must be isolated from the liquid phase with a high yield and purity. In this study, acacia wood was extracted by hydrothermal treatment, catalyzed by acetic acid at 170 °C for different lengths of time, and then precipitated after concentration and mixing with ethanol. Acetic acid led to faster hydrolysis of hemicelluloses, a process that was confirmed by a larger amount of total saccharides than the controlled results. A yield of more than 90% oligosaccharides was achieved in the hydrolysate with 1% (w/w) acetic acid. The maximum precipitate yield obtained was reduced, but a faster increase was observed in the first 30 min at 170 °C depending on the utilization of acetic acid. Analysis of 13 C nuclear magnetic resonance ( 13 C NMR) confirmed that the side chains, such as arabinose linked on the xylan chain, were severely broken down, and more dissolved hemicelluloses bonded with lignin (LCC) were present in the precipitates with 1% (w/w) acetic acid. Based on gel permeation chromatography (GPC), a molecular weight of not less than 1900 is suggested when ethanol is used to precipitate the oligosaccharides from hydrolysate. Keywords INTRODUCTIONThe chemical pulping industry is one of the largest manufacturers of lignocellulosic material, from which high strength and whiteness fibers are produced to make various grades of end-use papers. However, due to the increased capacity of the pulp and paper industry, the profitability of this industry is decreasing. Biorefining has been proposed to reshape the pulping industry by utilizing biomass resources more effectively and producing a variety of products (Vila et al. 2011;Liu et al. 2015). In kraft pulping, about 20% of biomass, mainly hemicelluloses, are dissolved in the black liquor along with lignin and then burned in the recovery cycle to produce energy for the process. However, the heating value of hemicelluloses is half that of lignin (13.6 MJ/kg) (Tunc and van Heiningen 2008). Therefore, instead of burning the hemicelluloses with black liquor, hemicellulose extraction prior to chemical pulping has been widely discussed as a practical approach in the implementation of a pulp mill-based biorefinery. There is great potential for the conversion of hemicelluloses derivatives into high-value added products such as fuels, films, health products, and polymers (Vila et al. 2011).Hydrothermal pretreatment (hot water treatment or autohydrolysis) is widely used to extract hemicelluloses from biomass for producing fermentable sugars and PEER-REVIEWED ARTICLE bioresources.com Shi et al. (2017). "Hemicelluloses from Acacia," BioResources 12(3), 6094-6108. 6095oligosaccharides (Ertas et al. 2014;Batalha et al. 2015;Cuevas et al. 2015). This method is a simple, low-cost, and attractive technology for extracting lignocelluloses in the kraft pulping (Deb et al. 2016), soda, soda-anthraquinone, and soda ethylenediamine processes for producing dissolving pulp (...

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Oligosaccharides and sugars production from olive stones by autohydrolysis and enzymatic hydrolysis

Cited by 32 publications

References 27 publications

Current Pretreatment Technologies for the Development of Cellulosic Ethanol and Biorefineries

Current Pretreatment Technologies for the Development of Cellulosic Ethanol and Biorefineries

Valorization of pineapple waste for the extraction of bioactive compounds and glycosides using autohydrolysis

Comparative Study on the Yield and Characterization of Hemicelluloses Isolated with Hydrothermal Extract and Catalyzed by Acetic Acid from Acacia Wood

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