Recent advances in lignocellulosic biomass for biofuels and value-added bioproducts - A critical review

Ashokkumar, Veeramuthu; Venkatkarthick, Radhakrishnan; Shanker, Jayashree; Chuetor, Santi; Dharmaraj, Selvakumar; Kumar, Gopalakrishnan; Chen, Wei‐Hsin; Ngamcharussrivichai, Chawalit

doi:10.1016/j.biortech.2021.126195

Cited by 292 publications

(119 citation statements)

References 119 publications

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“…Although both P. mandelii and A. fumigatus in this study belong to the group of leaf-litter-decomposing microorganisms, the highest degradation e ciency was obtained in the co-cultivation. In addition, fungi have a high capacity to depolymerize lignocellulose, and produce various extracellular enzymes that catalyze this decomposition process 3,45 . In contrast, bacteria that are more environmentally adapted mainly secrete some β-1,4-glucosidase, endoglucanases, cellobiohydrolases, and xylanases, and some coenzymes for the hydrolysis of polysaccharides 46,47 .…”

Section: Resultsmentioning

confidence: 99%

Variations in lignin monomer contents and stable hydrogen isotope ratios in methoxy groups during the biodegradation of garden biomass

Jia

Awasthi

et al. 2022

Preprint

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Lignin is the most difficult aromatic substance to degrade. Selective biodegradation under mild conditions is a promising method, but the dynamic variations in lignin monomers during the biodegradation of lignocellulose are not fully understood. In this study, we examined degradation of lignin monomers and changes in stable hydrogen isotope ratios (δ2HLM) in methoxy groups to test the potential of Pseudomonas mandelii, Aspergillus fumigatus, and their co-culture. The degradation weight loss and net degradation loss of lignocellulosic biomass during biodegradation improved dramatically with fungal inoculation. Syringyl monolignol (S-lignin), which contains two methoxy groups, was more difficult to degrade than guaiacyl (G-lignin), which contains only one methoxy group. The δ2HLM values generally remained stable during the depolymerization of lignin. The fluctuation of δ2HLM values during the initial phase of biodegradation may be related to the loss of pectic polysaccharides (another methoxy donor) from the leaves. Our statistical analysis showed that δ2HLM values did not differ among the microbial cultures or change over time despite decreasing G/S ratios. Our results suggest that lignin monomer ratios can be used to monitor differences in microbial metabolism during lignocellulose biodegradation, whereas δ2HLM signatures cannot be used.

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Section: Resultsmentioning

confidence: 99%

Variations in lignin monomer contents and stable hydrogen isotope ratios in methoxy groups during the biodegradation of garden biomass

Jia

Awasthi

et al. 2022

Preprint

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“…However, the protein-encoding genes of β-xylosidase and α-L-arabinofuranosidase were exclusive to C. marinus IMCC12053 T and C. naphthalenivorans EaN35-2, respectively. In general, hemicellulases are used to disintegrate the major parts of hemicellulose, such as xylan, mannan, and arabinan to release xylose, mannose, and arabinose, respectively [7,33,38]. These sugars have been used as materials for biofuel production, bread formulation, and prebiotic-based products [4,67].…”

Section: Analysis Of Cazymes and Mining Of Ghsmentioning

confidence: 99%

“…Lignocellulosic biomass consisting of cellulose, hemicellulose, and lignin serves as a raw material for second-generation biofuel production [33]. The complete degradation of lignocellulose involves a combination of numerous enzymes that can be categorised into three types based on their substrate specificities: cellulase, hemicellulase, and ligninolytic enzymes [34].…”

Section: Introductionmentioning

confidence: 99%

Genome Analysis of Celeribacter sp. PS-C1 Isolated from Sekinchan Beach in Selangor, Malaysia, Reveals Its β-Glucosidase and Licheninase Activities

et al. 2022

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A halophilic marine bacterial strain, PS-C1, was isolated from Sekinchan beach in Selangor, Malaysia. The 16S rRNA gene sequence analysis indicated that strain PS-C1 was associated with the genus Celeribacter. To date, there have been no reports on enzymes from the genus Celeribacter. The present study reports on the cellular features of Celeribacter sp. PS-C1, its annotated genome sequence, and comparative genome analyses of Celeribacter glycoside hydrolase (GH) enzymes. The genome of strain PS-C1 has a size of 3.87 Mbp and a G+C content of 59.10%, and contains 3739 protein-coding genes. Detailed analysis using the Carbohydrate-Active enZYmes (CAZy) database revealed that Celeribacter genomes harboured at least 12 putative genes encoding industrially important GHs that are grouped as cellulases, β-glucanases, hemicellulases, and starch-degrading enzymes. Herein, the potential applications of these enzymes are discussed. Furthermore, the activities of two types of GHs (β-glucosidase and licheninase) in strain PS-C1 were demonstrated. These findings suggest that strain PS-C1 could be a reservoir of novel GH enzymes for lignocellulosic biomass degradation.

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“…Several proven alternative energy resources have been developed to partially replace the main energy resources. Lignocellulosic biomass represents its potential for producing various value-added products including biofuels, biochemicals, and biomaterials via a biorefinery [1][2][3][4]. The utilization of lignocellulosic material as a renewable carbon source for high value-added products has been developed over the last decade [5].…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Combined Hydrothermal-Mechanical Pretreatment of Lignocellulosic Biomass for Enzymatic Enhancement

et al. 2022

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Pretreatment is a crucial process in a lignocellulosic biorefinery. Corncob is typically considered as a natural renewable carbon source to produce various bio-based products. This study aimed to evaluate the performance of the hydrothermal-mechanical pretreatment of corncob for biofuels and biochemical production. Corncob was first pretreated by liquid hot water (LHW) at different temperatures (140–180 °C) and duration (30, 60 min) and then subjected to centrifugal milling to produce bio-powders. To evaluate the performance of this combined pretreatment, the energy efficiency and waste generation were investigated. The results indicated that the maximum fermentable sugars (FS) were 0.488 g/g biomass obtained by LHW at 180 °C, 30 min. In order to evaluate the performance of this combined pretreatment, the energy efficiency and waste generation were 28.3 g of FS/kWh and 7.21 kg of waste/kg FS, respectively. These obtained results indicate that the combined hydrothermal-mechanical pretreatment was an effective pretreatment process to provide high energy efficiency and low waste generation to produce biofuels. In addition, the energy efficiency and waste generation will be useful indicators for process scaling-up into the industrial scale. This combined pretreatment could be a promising pretreatment technology for the production of biofuels and biochemicals from lignocellulosic valorization.

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Recent advances in lignocellulosic biomass for biofuels and value-added bioproducts - A critical review

Cited by 292 publications

References 119 publications

Variations in lignin monomer contents and stable hydrogen isotope ratios in methoxy groups during the biodegradation of garden biomass

Variations in lignin monomer contents and stable hydrogen isotope ratios in methoxy groups during the biodegradation of garden biomass

Genome Analysis of Celeribacter sp. PS-C1 Isolated from Sekinchan Beach in Selangor, Malaysia, Reveals Its β-Glucosidase and Licheninase Activities

Performance Evaluation of Combined Hydrothermal-Mechanical Pretreatment of Lignocellulosic Biomass for Enzymatic Enhancement

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