Comparison of dilute acid and alkali pretreatments in production of fermentable sugars from bamboo: Effect of Tween 80

Li, Kena; Wan, Jinming; Xiao, Wang; Wang, Jingfeng; Zhang, Junhua

doi:10.1016/j.indcrop.2016.01.003

Cited by 66 publications

(47 citation statements)

References 33 publications

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“…It has also been observed that the surfactants may get adsorbed on the lignin fraction of LCB, through hydrophobic interactions during the conversion of LCB to glucose. This prevents the cross-binding of enzymes to lignin and results in the improved turnover of glucose (Li K. et al, 2016). Nonetheless, dilute acid pretreatments also cause sugar degradation leading to the formation of inhibitory byproducts that needs to be removed.…”

Section: Acid Pretreatmentmentioning

confidence: 99%

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

et al. 2018

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Lignocellulosic biomass (LCB) is the most abundantly available bioresource amounting to about a global yield of up to 1. 3 billion tons per year. The hydrolysis of LCB results in the release of various reducing sugars which are highly valued in the production of biofuels such as bioethanol and biogas, various organic acids, phenols, and aldehydes. The majority of LCB is composed of biological polymers such as cellulose, hemicellulose, and lignin, which are strongly associated with each other by covalent and hydrogen bonds thus forming a highly recalcitrant structure. The presence of lignin renders the bio-polymeric structure highly resistant to solubilization thereby inhibiting the hydrolysis of cellulose and hemicellulose which presents a significant challenge for the isolation of the respective bio-polymeric components. This has led to extensive research in the development of various pretreatment techniques utilizing various physical, chemical, physicochemical, and biological approaches which are specifically tailored toward the source biomaterial and its application. The objective of this review is to discuss the various pretreatment strategies currently in use and provide an overview of their utilization for the isolation of high-value bio-polymeric components. The article further discusses the advantages and disadvantages of the various pretreatment methodologies as well as addresses the role of various key factors that are likely to have a significant impact on the pretreatment and digestibility of LCB.

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Section: Acid Pretreatmentmentioning

confidence: 99%

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

et al. 2018

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“…Yao et al (2007); Nasirpour et al (2014); Pandey and Negi. (2015); Das et al (2015); Li et al (2016); Aswathy et al (2010) and Han et al (2012) used DNS method to determine the total reducing sugars. The saccharification yield was calculated using Eq.…”

Section: Analysis Of Reducing Sugarsmentioning

confidence: 99%

Enzymatic Saccharification of Acid/Alkali Pre-treated, Mill-run, and Depithed Sugarcane Bagasse

Mkhize¹,

Mthembu²,

Gupta³

et al. 2016

BioResources

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aIn South Africa, approximately 3 × 10 6 tons of sugarcane bagasse is produced annually by 14 factories located on the north coast of KwaZuluNatal. It is one of the most readily available lignocellulosic materials for ethanol production through enzymatic saccharification and hydrolysis. Pre-treatment enables disruption of the naturally resistant structure of lignocellulosic biomass to make the cellulose accessible to hydrolysis for conversion to biofuels. In this study, pre-treatment of depithed bagasse and mill-run bagasse was done using acid (3% H2SO4 v/v) followed by alkali (4% NaOH w/v), and the pre-treated solid was subjected to enzymatic hydrolysis. The effects of different conditions for enzymatic saccharification such as enzyme dose, reaction time, and amount of surfactant were studied in detail. The pre-treated substrate (10% w/v) when hydrolysed using 30 FPU/gds/40 FPU/g dry substrate (gds) with 0.4% (v/v) Tween® 80 for 20 h resulted in 608 mg/gds (depithed bagasse) and 604 mg/gds (mill-run bagasse) total reducing sugars.

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“…The bioconversion process is still constrained due to the recalcitrance of these energy crops. Different pretreatment strategies such as pretreatments using acid, alkaline or hot water, explosion pretreatments with steam or ammonia, and biological pretreatment have been reported for reducing the recalcitrance of lignocellulosic biomass wastes, and hence, enhancing the digestibility of these biomass wastes [12][13][14][15][16][17][18]. Chemical pretreatment has been extensively investigated, from lab-scale studies to large-scale ethanol fermentation applications, especially those using low lignin biomass (e.g., agricultural wastes) as substrates [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…Acid pretreatment, which has substantial advantages such as its low cost and high efficiency, is a commonly used technique [12,16]. It is usually performed with acid addition of 0.01~5% (w/w) at 120~210 • C for 5~120 minutes, and it cleaves the glucosidic bonds of polysaccharides and effectively removes hemicellulosic components with less impact on lignin [12][13][14][15][16][17]. The main drawbacks of acid pretreatment with inorganic acids (e.g., sulfuric acid) are the formation of inhibitory compounds and its requirement for corrosion-resistant reactors [12].…”

Section: Introductionmentioning

confidence: 99%

One-Step or Two-Step Acid/Alkaline Pretreatments to Improve Enzymatic Hydrolysis and Sugar Recovery from Arundo Donax L.

Tang

Cao

et al. 2020

Energies

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Energy crops are not easily converted by microorganisms because of their recalcitrance. This necessitates a pretreatment to improve their biodigestibility. The effects of different pretreatments, as well as their combination on the enzymatic digestibility of Arundo donax L. were systematically investigated to evaluate its potential for bioconversion. Dilute alkaline pretreatment (ALP) using 1.2% NaOH at 120 °C for 30 min resulted in the highest reducing sugar yield in the enzymatic hydrolysis process because of its strong delignification and morphological modification, while ferric chloride pretreatment (FP) was effective in removing hemicellulose and recovering soluble sugars in the pretreatment stage. Furthermore, an efficient two-step ferric chloride-alkaline pretreatment (FALP) was successfully developed. In the first FP step, easily degradable cellulosic components, especially hemicellulose, were dissolved and then effectively recovered as soluble sugars. Subsequently, the FP sample was further treated in the second ALP step to remove lignin to enhance the enzymatic hydrolysis of the hardly degradable cellulose. As a result, the integrated two-step process obtained the highest total sugar yield of 420.4 mg/g raw stalk in the whole pretreatment and enzymatic hydrolysis process; hence, the process is a valuable candidate for biofuel production.

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Comparison of dilute acid and alkali pretreatments in production of fermentable sugars from bamboo: Effect of Tween 80

Cited by 66 publications

References 33 publications

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

Enzymatic Saccharification of Acid/Alkali Pre-treated, Mill-run, and Depithed Sugarcane Bagasse

One-Step or Two-Step Acid/Alkaline Pretreatments to Improve Enzymatic Hydrolysis and Sugar Recovery from Arundo Donax L.

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