A comparative assessment of biomass pretreatment methods for the sustainable industrial upscaling of rice straw into cellulose

Kaur, Prabhpreet; Bohidar, Himadri B.; Pfeffer, Frederick M.; Williams, Richard J.; Agrawal, Ruchi

doi:10.1007/s10570-023-05161-4

Cited by 15 publications

(4 citation statements)

References 68 publications

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“…Additionally, these bacteria can synthesize various enzymes such as α-amylase, protease, lipase, and cellulase, which can work in synergy with the digestive enzymes inside the gut of BSFL ( Xiao et al, 2018 ). Before renewable lignocellulosic residues converted into value-added bio-products through bioconversion, several pretreatment methods are often used to break down their resistant structure, such as dilute acid, steam explosion, and hydrothermal ( Agrawal et al, 2021a ; Kaur et al, 2023 ). The efficient hydrolysis of lignocellulosic biomass requires a variety of enzymes, studies have shown that accessory enzymes play a synergistic and critical role in enzymatic hydrolysis of ligno-cellulosic biomass ( Agrawal et al, 2018 ; agrawal et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Synergistic bioconversion of organic waste by black soldier fly (Hermetia illucens) larvae and thermophilic cellulose-degrading bacteria

Shao,

Zhao,

Rehman

et al. 2024

Front. Microbiol.

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IntroductionThis study examines the optimum conversion of Wuzhishan pig manure by Black Soldier Fly Larvae (BSFL) at various phases of development, as well as the impact of gut microbiota on conversion efficiency.Method and resultsIn terms of conversion efficiency, BSFL outperformed the growing pig stage (GP) group, with significantly higher survival rates (96.75%), fresh weight (0.23 g), and larval conversion rate (19.96%) compared to the other groups. Notably, the GP group showed significant dry matter reductions (43.27%) and improved feed conversion rates (2.17). Nutritional composition varied, with the GP group having a lower organic carbon content. High throughput 16S rRNA sequencing revealed unique profiles, with the GP group exhibiting an excess of Lactobacillus and Clostridium. Promising cellulose-degrading bacteria in pig manure and BSFL intestines, including Bacillus cereus and Bacillus subtilis, showed superior cellulose degradation capabilities. The synergy of these thermophilic bacteria with BSFL greatly increased conversion efficiency. The BSFL1-10 group demonstrated high growth and conversion efficiency under specific conditions, with remarkable larval moisture content (71.11%), residual moisture content (63.20%), and waste reduction rate (42.28%).DiscussionThis study sheds light on the optimal stages for BSFL conversion of pig manure, gut microbiota dynamics, promising thermophilic cellulose-degrading bacteria, and the significant enhancement of efficiency through synergistic interactions. These findings hold great potential for sustainable waste management and efficient biomass conversion, contributing to environmental preservation and resource recovery.

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Section: Introductionmentioning

confidence: 99%

Synergistic bioconversion of organic waste by black soldier fly (Hermetia illucens) larvae and thermophilic cellulose-degrading bacteria

Shao,

Zhao,

Rehman

et al. 2024

Front. Microbiol.

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“…Therefore, a pretreatment step to increase the accessibility of polysaccharides to enzymes is necessary in an optimized biorefinery process. Nowadays, different physical (milling, extrusion, microwave, ultrasounds …), chemical (acid or alkali treatment, reductive and oxidative fractionation) or physico-chemical (supercritical fluids, steam explosion, CO 2 explosion pretreatment, ammonia fiber expansion, and liquid hot water) fractionation processes for an efficient release of fermentable sugars have been proposed ( Wang et al, 2019 ; Mankar et al, 2021 ; Agrawal et al, 2022 ; Kaur et al, 2023 ; Sharma et al, 2023 ). These traditional methods present several disadvantages as they generally require toxic hazardous organic solvents and harsh condition resulting in high energy consumption and raising serious concerns in terms of safety and environmental impact, native primary structure degradation, and most of all derivatization of the components during the treatment ( Mankar et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Challenging DESs and ILs in the valorization of food waste: a case study

Mero,

Moody,

Husanu

et al. 2023

Front. Chem.

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In this study, the efficacy of two of the best performing green solvents for the fractionation of lignocellulosic biomass, cholinium arginate (ChArg) as biobased ionic liquid (Bio-IL) and ChCl:lactic acid (ChCl:LA, 1:10) as natural deep eutectic solvent (NADES), was investigated and compared in the pretreatment of an agri-food industry waste, apple fibers (90°C for 1 h). For the sake of comparison, 1-butyl-3-methylimidazolium acetate (BMIM OAc) as one of the best IL able to dissolve cellulose was also used. After the pretreatment, two fractions were obtained in each case. The results gathered through FTIR and TG analyses of the two materials and the subsequent DNS assay performed after enzymatic treatment led to identify ChArg as the best medium to delignify and remove waxes, present on the starting apple fibers, thus producing a material substantially enriched in cellulose (CRM). Conversely, ChCl:LA did not provide satisfactorily results using these mild conditions, while BMIM OAc showed intermediate performance probably on account of the reduced crystallinity of cellulose after the dissolution-regeneration process. To corroborate the obtained data, FTIR and TG analyses were also performed on the residues collected after the enzymatic hydrolysis. At the end of the pretreatment, ChArg was also quantitatively recovered without significant alterations.

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“…Therefore, the selection of a suitable pretreatment will significantly increase the efficiency of the hydrolysis [13]. Comparative studies are relevant for the optimization of each pretreatment technology on an industrial scale [14]. Some of the most commonly applied pretreatments are bleaching mixtures (acetate buffer and sodium chlorite aqueous solution at 100 • C) and alkaline (sodium hydroxide at 120 • C) and/or acid (acetic acid and nitric acid at 105 • C) methods.…”

Section: Introductionmentioning

confidence: 99%

Utility Aspects of Sugarcane Bagasse as a Feedstock for Bioethanol Production: Leading Role of Steam Explosion as a Pretreatment Technique

Barciela,

Perez-Vazquez,

Fraga-Corral

et al. 2023

Processes

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Lignocellulosic biomass is a powerful approach to produce sustainable biofuels and the further achievement of the goal of biomass conversion into a second-generation clean energy that can cope with the depletion of fossil reserves and rising energy requirements. In the conversion process, a pretreatment is essential to overcome the recalcitrance of the lignocellulosic biomass; accelerate its disintegration into cellulose, hemicellulose, and lignin; and, in turn, obtain an optimal yield of fermentable sugars in the enzymatic hydrolysis. In addition to this, it should be industrially scalable and capable of enhancing fuel properties and feedstock processability. Here, steam explosion technology has stood out due to its results and advantages, such as wide applicability, high efficiency in the short term, or lack of contamination despite its conventionality. This gentle and fast pretreatment incorporates high temperature autohydrolysis and structural alteration by explosive decompression. The steam explosion method has been one of the most effectual, especially for the hydrolysis of cellulose from agricultural wastes due to the lower quantity of acetyl groups in the composition of hemicellulose. In this aspect, sugarcane bagasse is a promising feedstock for bioethanol production due to its high cellulosic content and elevated availability. The objective of this review has been to compile the latest information on steam explosion pretreatment, stages, equipment, variables involved, by-products generated, as well as the advantages and disadvantages of the technique. At the same time, its feasibility and viability using sugarcane bagasse as feedstock has been discussed. Finally, the effectiveness of the technique with different feedstocks has been evaluated.

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A comparative assessment of biomass pretreatment methods for the sustainable industrial upscaling of rice straw into cellulose

Cited by 15 publications

References 68 publications

Synergistic bioconversion of organic waste by black soldier fly (Hermetia illucens) larvae and thermophilic cellulose-degrading bacteria

Synergistic bioconversion of organic waste by black soldier fly (Hermetia illucens) larvae and thermophilic cellulose-degrading bacteria

Challenging DESs and ILs in the valorization of food waste: a case study

Utility Aspects of Sugarcane Bagasse as a Feedstock for Bioethanol Production: Leading Role of Steam Explosion as a Pretreatment Technique

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