Enzymatic Hydrolysis of Lignocellulosic Residues

Shuddhodana,; Mohnot, D.; Biswas, Ranjita; Bisaria, Virendra S.

doi:10.1016/b978-0-12-802323-5.00023-2

Cited by 5 publications

(2 citation statements)

References 67 publications

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“…Endo-β 1-4-glucanase hydrolyzes internal links in cellulose chains to short-chain cellodextrins. Exo-β 1-4-glucanase cleaves cellobiose from the non-reducing end of the chains, and β-glycosidase hydrolyzes cellobiose units to glucose units (Shuddhodana et al, 2016). Regarding the heteropolysaccharide structure of hemicellulose, different enzymes are needed to hydrolyze it to monomeric sugars.…”

Section: Biological Methodsmentioning

confidence: 99%

Fermentative Lactic Acid Production From Lignocellulosic Feedstocks: From Source to Purified Product

Yankov

2022

Front. Chem.

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The second (lignocellulosic biomass and industrial wastes) and third (algal biomass) generation feedstocks gained substantial interest as a source of various value-added chemicals, produced by fermentation. Lactic acid is a valuable platform chemical with both traditional and newer applications in many industries. The successful fractionation, separation, and hydrolysis of lignocellulosic biomass result in sugars’ rich raw material for lactic acid fermentation. This review paper aims to summarize the investigations and progress in the last 5 years in lactic acid production from inexpensive and renewable resources. Different aspects are discussed—the type of raw materials, pretreatment and detoxification methods, lactic acid-producers (bacteria, fungi, and yeasts), use of genetically manipulated microorganisms, separation techniques, different approaches of process organization, as well as main challenges, and possible solutions for process optimization.

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Section: Biological Methodsmentioning

confidence: 99%

Fermentative Lactic Acid Production From Lignocellulosic Feedstocks: From Source to Purified Product

Yankov

2022

Front. Chem.

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“…The introduction of greener processes for disassembling plant biomass remains a major environmental issue, which could allow a better valorization of the rich chemistry of lignin components. The higher purity requirement for cellulose used in second-generation ethanol biorefineries is fostering the development of organosolv pulping processes, favoring the recovery of lignin coproducts. − In the organosolv fractionation of lignocellulosic biomass, wood is in contact with different solvents in order to produce treated fractions of cellulose pulp, soluble lignin, and hemicellulose-derived products. , The use of multicomponent solvents has provided remarkable results in fractionation processes of several levels of severity, ranging from swelling, dilute acid, hydrothermal, steam explosion, and alkaline treatment to organosolv pulping. − Despite all invested efforts, no fractionation method is currently capable of valorizing all functionalities of lignocellulose components in an economically viable commercial-scale deconstruction process.…”

Section: Introductionmentioning

confidence: 99%

Molecular Insight into the Cosolvent Effect on Lignin–Cellulose Adhesion

2020

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Understanding and controlling the physical adsorption of lignin compounds on cellulose pulp is a key parameter for a successful optimization of organosolv processes. The effect of binary organic-aqueous solvents on the coordination of lignin to cellulose was studied with molecular dynamics simulations, considering ethanol and acetonitrile as organic co-solvents in aqueous solutions in comparison to their mono-component counterparts. The structures of the solvation shells around cellulose and lignin, as well as the energetics of the lignin-cellulose adhesion, indicate a more effective disruption of lignin-cellulose binding by binary solvents. The synergic effect between solvent components is explained by their preferential interactions with celluloselignin complexes. In the presence of pure water, long-lasting H-bonds in the lignin-cellulose complex are observed, promoted by the non-favorable interactions of lignin with water. Ethanol and acetonitrile compete with water and lignin for cellulose oxygen binding sites, causing a non-linear decrease of the cellulose-lignin interactions with the amount of the organic component. This effect is modulated by the water exclusion from the cellulose solvation shell by the organic solvent component. The amount and rate of water exclusion depend on the type of organic cosolvent and its concentration.

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Diesel production from lignocellulosic residues: trends, challenges and opportunities

Infante,

Gomide,

Secchi

et al. 2024

Biofuels Bioprod Bioref

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This article aims to review the various techniques used to produce diesel from lignocellulosic biomass. Data were collected using the Web of Science database to identify trends, barriers, and prospects associated with the alternative methods used. The analysis reviewed 359 papers published between 2006 and 2021, focusing on three key areas: biomass pretreatment, biomass conversion, and biorefining. Pretreatment technologies require extensive research to reduce excessive energy and reagent consumption, thereby reducing overall costs. Fast pyrolysis and lipid‐producing microorganisms have been shown to be the most promising conversion routes due to their versatility in utilizing different lignocellulosic residues and producing a wide range of marketable co‐products. The most widely used method used for refining is hydroprocessing coupled with catalysts, with the objective of improving bio‐oil quality. Two of the main challenges are the excessive cost of the overall process and the limitations imposed by the technology. These limitations require processing optimization to achieve sustainable production and valuable co‐products. The growth of lignocellulosic diesel production will depend on the integration with other biodiesel and biofuel production processes by the optimization of new processes and the generation of new bioproducts to increase efficiency and reduce costs for commercial viability.

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Enzymatic Hydrolysis of Lignocellulosic Residues

Cited by 5 publications

References 67 publications

Fermentative Lactic Acid Production From Lignocellulosic Feedstocks: From Source to Purified Product

Fermentative Lactic Acid Production From Lignocellulosic Feedstocks: From Source to Purified Product

Molecular Insight into the Cosolvent Effect on Lignin–Cellulose Adhesion

Diesel production from lignocellulosic residues: trends, challenges and opportunities

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