Sugar-rich sweet sorghum is distinctively affected by wall polymer features for biomass digestibility and ethanol fermentation in bagasse

Li, Meng; Feng, Shengqiu; Wu, Leiming; Liu, Ying; Fan, Chunfen; Zhang, Rui; Zou, Weihua; Tu, Yuanyuan; Jing, Hai‐Chun; Li, Shizhong

doi:10.1016/j.biortech.2014.04.086

Cited by 72 publications

(67 citation statements)

References 31 publications

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“…By comparison, the NaOH pretreatments led to hexoses yields higher than those of H2SO4 pretreatments by 2 to 3 folds (Fig. 2B, Table A.3), consistent with the previous observations in other plant species examined (Xu et al 2012;Wu et al 2013;Li et al 2014a;Jia et al 2014). Notably, extremely high alkali concentration (16%) could respectively yield the highest hexoses levels, i.e.…”

Section: Varied Enhancements On Biomass Digestibility By Chemical Presupporting

confidence: 79%

“…Notably, a similar increase in hexoses yields was also observed in the sequential dilute alkali (NaOH) pretreatments (Fig. 1B), which was different from previous observations that alkali pretreatments can lead to much higher hexoses yields than those of acid pretreatments with raw biomass in many plant species (Xu et al 2012;Wu et al 2013;Li et al 2014a;Jia et al 2014). As steam explosion is somewhat like the acid pretreatment, which could predominately remove hemicelluloses (Jørgensen et al 2007;Alvira et al 2010), the present findings may imply that the sequential dilute acid and alkali pretreatments could lead to a similar enhancement on biomass saccharification in the three fiber crops.…”

Section: Steam Explosion Enhancements On Biomass Saccharificationcontrasting

confidence: 54%

“…On the other hand, jute had a higher Xyl/Ara ratio (128) than those of both kenaf (52) and ramie (63) in the raw stalks but showed a much lower Xyl/Ara ratio (18) than those of kenaf (52) and ramie (107) in the steam-exploded residues. Since Xyl/Ara is the main factor negatively affecting biomass enzymatic digestibility in many plant species examined (Wu et al 2013;Li et al 2013;Li et al 2014a;Jia et al 2014), the fact that jute showed much reduced Xyl/Ara ratio in the steam-exploded residue was consistent with its much increased hexoses yields (Fig. 1).…”

Section: Distinct Alterations Of Hemicelluloses and Lignin Featuresmentioning

confidence: 58%

“…As lignocellulose CrI is a negative factor on biomass enzymatic digestibility under various pretreatments in many plant species examined (Chang and holtzapple 2000;Zhang et al 2013;Wu et al 2013;Li et al 2013;Li et al 2014a), this could explain why kenaf showed higher hexoses yields than those of jute under 16% NaOH pretreatment, while ramie had the lowest hexoses yields under H2SO4 pretreatments among the three fiber crops (Fig. 2).…”

Section: Naohmentioning

confidence: 97%

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Three Fiber Crops Show Distinctive Biomass Saccharification under Physical and Chemical Pretreatments by Altered Wall Polymer Features

Wei¹,

Zhou²,

Huang³

et al. 2016

BioResources

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Jute, kenaf, and ramie are important fiber crops in the textile industry, but their core stalks have not been well used. In this study, three fiber crops were examined with enhanced hexoses yields (% cellulose) up to 4.8-, 3.6-, and 1.9-fold from enzymatic hydrolysis of the steam-exploded stalks. Sequential dilute acid/alkali pretreatments achieved the increased hexoses yields up to 7.6-, 4.8-, and 2.8-fold. Without steam explosion, the three crops could increase hexoses yields under extremely high concentrations of NaOH (12% to 16%). While kenaf and ramie mainly showed hemicelluloses removal with steam explosion, jute exhibited an effective co-extraction of hemicelluloses and lignin, which greatly reduced its cellulose DP, hemicellulosic Xyl/Ara, and G-monomer. These findings explain why jute had the highest hexoses yield among the three crops and also suggest that G-monomer and Xyl may interact in a way that mainly determines wall polymers co-extraction with steam explosion.

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Section: Varied Enhancements On Biomass Digestibility By Chemical Presupporting

confidence: 79%

Section: Steam Explosion Enhancements On Biomass Saccharificationcontrasting

confidence: 54%

Section: Distinct Alterations Of Hemicelluloses and Lignin Featuresmentioning

confidence: 58%

Section: Naohmentioning

confidence: 97%

See 2 more Smart Citations

Three Fiber Crops Show Distinctive Biomass Saccharification under Physical and Chemical Pretreatments by Altered Wall Polymer Features

Wei¹,

Zhou²,

Huang³

et al. 2016

BioResources

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“…Bioethanol fermentation experiments were carried out as described by Li et al [16]. After the fermentation, the RS and ethanol concentration in the supernatant was determined, according to the formula to calculate the yield of ethanol fermentation.…”

Section: Fermentation Experiments Of Bioethanolmentioning

confidence: 99%

Optimizing Dilute-acid Hydrolysis (DACH) of Distillers Grains and Ethanol Fermentation

Ren¹,

Pei²,

Xing³

et al. 2015

JRST

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Distillers grain (DG) is an abundant and low-cost lignocellulosic biomass. The objective of paper is to compare the influence of different acids on hydrolysis of DG and select the best acid. The results indicate that sulfuric acid is the most effective acid, and the optimum hydrolysis conditions are temperature 100°C, sulfuric acid concentration 2.0%, solid-liquid rate 1:12 (w/v), time 3.0 h. Under these conditions, the concentration of reducing sugar (RS) and xylose are 43.69 g/L and 35.16 g/L, respectively. The bioethanol production is around 11.82 g/L, which corresponds to 77.12% of theoretical yield and 0.14 g/g of consumed sugar.

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Comparison of the effects of different pretreatments on the structure and enzymatic hydrolysis of Miscanthus

Dai

Yang

et al. 2021

Biotech and App Biochem

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Miscanthus is regarded as a desired bioenergy crop with enormous lignocellulose residues for biofuels and other chemical products. In this study, the effect of different pretreatments (including microwave, NaOH, CaO, and microwave + NaOH/CaO) on sugar yields was investigated, leading to largely varied hexose yields at 4.0–73.4% (% cellulose) released from enzymatic hydrolysis of pretreated Miscanthus residues. Among them, the highest yield of 73.4% for hexoses was obtained from 12% NaOH (w/v) solution pretreatment, whereas 1% CaO (w/w) and microwave pretreatment resulted in a lower hexose yield than the control (without pretreatment). The sugar yield from microwave followed with 1% NaOH pretreatment was 4.3 times higher than that of microwave followed with 1% CaO. However, the enzymatic hydrolysis efficiencies of the sample were 15.2% and 58.5% under microwave pretreatment followed by 12% NaOH or 12.5% CaO, respectively, which were lower than those of the same concentration of alkali (NaOH and CaO) pretreatments. To investigate the mechanism of varied enzymatic saccharification under different pretreatments, the changes in the surface structure and porosity of the Miscanthus‐pretreated lignocelluses were studied by means of Fourier transform infrared, Congo red staining, and scanning electron microscopy analysis. The results show that the different pretreatments destroy the cell wall cladding structure and reduce the bonding force between cellulose, hemicellulose, and lignin to different degrees, therefore increasing the accessibility of cellulose and enhancing cellulose digestion.

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Sugar-rich sweet sorghum is distinctively affected by wall polymer features for biomass digestibility and ethanol fermentation in bagasse

Cited by 72 publications

References 31 publications

Three Fiber Crops Show Distinctive Biomass Saccharification under Physical and Chemical Pretreatments by Altered Wall Polymer Features

Three Fiber Crops Show Distinctive Biomass Saccharification under Physical and Chemical Pretreatments by Altered Wall Polymer Features

Optimizing Dilute-acid Hydrolysis (DACH) of Distillers Grains and Ethanol Fermentation

Comparison of the effects of different pretreatments on the structure and enzymatic hydrolysis of Miscanthus

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