Enhancement in the enzymatic digestibility of hybrid poplar with poor residual hemicelluloses after Na2SO3 pretreatment

Hua, Jiang; Han, Bin; Ge, Jianhong

doi:10.1016/j.biortech.2014.12.103

Cited by 14 publications

(3 citation statements)

References 23 publications

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“…In the sulfuric acid and steam explosion pretreatments, the first step poplar pretreatment condition was 0.7% H 2 SO 4 at room temperature overnight and the second step pretreatment condition was steam explosion at 190 °C for 10 min and finally only 70% glucose yield was obtained by 72 h enzymatic hydrolysis with loading 32 mg cellulases/g DM [9]. Additionally, two-step poplar pretreatments such as sodium hydroxide and sodium sulfate, white-rot and sodium hydroxide, sulfuric acid and steam explosion, sulfur dioxide steam explosion and ethanol can improve poplar hydrolysis yield, but the associated conditions are still very severe [5, 9, 10]. In this work, xylan in poplar was efficiently used for XOS production and glucan was almost completely hydrolysis.…”

Section: Resultsmentioning

confidence: 99%

“…Poplar, as a fast growing, widely distributed, short rotation period crop, is considered as a suitable feedstock for this process [3, 4]. Enzymatic hydrolysis of poplar for the production of fermentable sugars, a key step for biofuels and biochemicals production, has been extensively investigated and different pretreatments, including ionic liquids, steam explosion, and acid/alkaline media, have been adopted to increase the accessibility of enzymes to polysaccharides [5–10]. These pretreatments are usually conducted with high temperature or long time [6].…”

Section: Introductionmentioning

confidence: 99%

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Production of xylooligosaccharides and monosaccharides from poplar by a two-step acetic acid and peroxide/acetic acid pretreatment

Wen

Tian

Wang

et al. 2019

Biotechnol Biofuels

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Background Populus (poplar) tree species including hybrid varieties are considered as promising biomass feedstock for biofuels and biochemicals production due to their fast growing, short vegetative cycle, and widely distribution. In this work, poplar was pretreated with acetic acid (AC) to produce xylooligosaccharides (XOS), and hydrogen peroxide–acetic acid (HPAC) was used to remove residual lignin in AC-pretreated poplar for enzymatic hydrolysis. The aim of this work is to produce XOS and monosaccharides from poplar by a two-step pretreatment method. Results The optimal conditions for the AC pretreatment were 170 °C, 5% AC, and 30 min, giving a XOS yield of 55.8%. The optimal HPAC pretreatment conditions were 60 °C, 2 h, and 80% HPAC, resulting in 92.7% delignification and 87.8% cellulose retention in the AC-pretreated poplar. The two step-treated poplar presented 86.6% glucose yield and 89.0% xylose yield by enzymatic hydrolysis with a cellulases loading of 7.2 m/g dry mass. Very high glucose (93.8%) and xylose (94.6%) yields were obtained with 14.3 mg cellulases/g dry mass. Both Tween 80 and β-glucosidase enhanced glucose yield of HPAC-pretreated poplar by alleviating the accumulation of cellobiose. Under the optimal conditions, 6.9 g XOS, 40.3 g glucose, and 8.9 g xylose were produced from 100 g poplar. Conclusions The AC and HPAC pretreatment of poplar represented an efficient strategy to produce XOS and fermentable sugars with high yields. This two-step pretreatment was a recyclable benign and advantageous scheme for biorefinery of the poplar into XOS and monosaccharides. Electronic supplementary material The online version of this article (10.1186/s13068-019-1423-x) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Production of xylooligosaccharides and monosaccharides from poplar by a two-step acetic acid and peroxide/acetic acid pretreatment

Wen

Tian

Wang

et al. 2019

Biotechnol Biofuels

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“…The FTIR spectra were generated on the FTIR spectrometer using KBr translucent disks containing 1% sample in the absorbance mode. The data was recorded within the region of 4000 cm -1 to 400 cm -1 at a resolution of 4 cm -1 with 128 scans (Jiang et al 2015).…”

Section: Ftir Analysismentioning

confidence: 99%

Combination pretreatment of steam explosion and NaOH enhances enzymatic saccharification of corn stove

Liu

Zhang

Wang

et al. 2018

BioRes

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The presence of lignin sheaths and the crystalline structure of cellulose are two key barriers in the development of corn stover (CS). To remove these two barriers and improve the digestibility of carbohydrates in CS, CS (pretreated by H2O2, H2SO4, NaOH, an enzyme, steam explosion [SE], and SE combined with NaOH [SE-NaOH]) was hydrolyzed. The total reducing sugar yield (Ytrs), accessibility of the enzyme to the substrate (Kobs,0), and gradual loss of the enzyme activity (Ki) were compared by regression analysis of the kinetic model, scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction analysis. The pretreatment dramatically increased the Ytrs and Kobs,0, and remarkably decreased the Ki. The maximum increase in the Ytrs (106.57%) was obtained after the saccharification reaction of the CS pretreated by SE-NaOH. Physicochemical characterizations of the CS pretreated by SE-NaOH showed that the SE-NaOH pretreatment effectively reduced the lignin sheath, decreased cellulose crystallization, and created favorable conditions for enzymatic diffusion and penetration.

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Effect of acid pretreatment on different parts of corn stalk for second generation ethanol production

Cai

Luo

et al. 2016

Bioresource Technology

142

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Enhancement in the enzymatic digestibility of hybrid poplar with poor residual hemicelluloses after Na2SO3 pretreatment

Cited by 14 publications

References 23 publications

Production of xylooligosaccharides and monosaccharides from poplar by a two-step acetic acid and peroxide/acetic acid pretreatment

Production of xylooligosaccharides and monosaccharides from poplar by a two-step acetic acid and peroxide/acetic acid pretreatment

Combination pretreatment of steam explosion and NaOH enhances enzymatic saccharification of corn stove

Effect of acid pretreatment on different parts of corn stalk for second generation ethanol production

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