Enhancing the enzymatic saccharification of bamboo shoot shell by sequential biological pretreatment with Galactomyces sp. CCZU11-1 and deep eutectic solvent extraction

Dai, Yanjun; Zhang, Hai-Sheng; Huan, Bin; He, Yubin

doi:10.1007/s00449-017-1800-4

Cited by 38 publications

(9 citation statements)

References 47 publications

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“…Biological pretreatments also get along with chemical processes and have been used in combination with, for instance, deep eutectic solvents [98], or dilute acid pretreatment [99].…”

Section: Hybrid Pretreatmentsmentioning

confidence: 99%

Advanced Bioethanol Production: From Novel Raw Materials to Integrated Biorefineries

et al. 2021

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The production of so-called advanced bioethanol offers several advantages compared to traditional bioethanol production processes in terms of sustainability criteria. This includes, for instance, the use of nonfood crops or residual biomass as raw material and a higher potential for reducing greenhouse gas emissions. The present review focuses on the recent progress related to the production of advanced bioethanol, (i) highlighting current results from using novel biomass sources such as the organic fraction of municipal solid waste and certain industrial residues (e.g., residues from the paper, food, and beverage industries); (ii) describing new developments in pretreatment technologies for the fractionation and conversion of lignocellulosic biomass, such as the bioextrusion process or the use of novel ionic liquids; (iii) listing the use of new enzyme catalysts and microbial strains during saccharification and fermentation processes. Furthermore, the most promising biorefinery approaches that will contribute to the cost-competitiveness of advanced bioethanol production processes are also discussed, focusing on innovative technologies and applications that can contribute to achieve a more sustainable and effective utilization of all biomass fractions. Special attention is given to integrated strategies such as lignocellulose-based biorefineries for the simultaneous production of bioethanol and other high added value bioproducts.

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“…Biological pretreatments also get along with chemical processes and have been used in combination with, for instance, deep eutectic solvents [98], or dilute acid pretreatment [99].…”

Section: Hybrid Pretreatmentsmentioning

confidence: 99%

Advanced Bioethanol Production: From Novel Raw Materials to Integrated Biorefineries

et al. 2021

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“…Choline chloride (ChCl), a bulk chemical, based deep eutectic solvents was firstly synthesized by Abbott at 2004 [ 25 ]. Since then, various ChCl-based DESs have been developed and attempted in the pretreatment of various lignocellulosic biomass such as corn stover, corncob, rice straw, bamboo shell, etc., with high efficiency in removing lignin [ 3 , 26 – 29 ]. Endeavor has been committed in optimizing the HBDs including organic or inorganic acids, amino acids, alcohols and sugars.…”

Section: Introductionmentioning

confidence: 99%

Facilely reducing recalcitrance of lignocellulosic biomass by a newly developed ethylamine-based deep eutectic solvent for biobutanol fermentation

Xing

et al. 2020

Biotechnol Biofuels

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Background Biobutanol is promising and renewable alternative to traditional fossil fuels and could be produced by Clostridium species from lignocellulosic biomass. However, biomass is recalcitrant to be hydrolyzed into fermentable sugars attributed to the densely packed structure by layers of lignin. Development of pretreatment reagents and processes for increasing surface area, removing hemicellulose and lignin, and enhancing the relative content of cellulose is currently an area of great interest. Deep eutectic solvents (DESs), a new class of green solvents, are effective in the pretreatment of lignocellulosic biomass. However, it remains challenging to achieve high titers of total sugars and usually requires combinatorial pretreatment with other reagents. In this study, we aim to develop novel DESs with high application potential in biomass pretreatment and high biocompatibility for biobutanol fermentation. Results Several DESs with betaine chloride and ethylamine chloride (EaCl) as hydrogen bond acceptors were synthesized. Among them, EaCl:LAC with lactic acid as hydrogen bond donor displayed the best performance in the pretreatment of corncob. Only by single pretreatment with EaCl:LAC, total sugars as high as 53.5 g L−1 could be reached. Consecutive batches for pretreatment of corncob were performed using gradiently decreased cellulase by 5 FPU g−1. At the end of the sixth batch, the concentration and specific yield of total sugars were 58.8 g L−1 and 706 g kg−1 pretreated corncob, saving a total of 50% cellulase. Utilizing hydrolysate as carbon source, butanol titer of 10.4 g L−1 was achieved with butanol yield of 137 g kg−1 pretreated corncob by Clostridium saccharobutylicum DSM13864. Conclusions Ethylamine and lactic acid-based deep eutectic solvent is promising in pretreatment of corncob with high total sugar concentrations and compatible for biobutanol fermentation. This study provides an efficient pretreatment reagent for facilely reducing recalcitrance of lignocellulosic materials and a promising process for biobutanol fermentation from renewable biomass.

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“…Choline chloride (ChCl), a bulk chemical, based deep eutectic solvents was rstly synthesized by Abbott at 2004 [25]. Since then, various ChCl based DESs have been developed and attempted in the pretreatment of various lignocellulosic biomass such as corn stover, corncob, rice straw and bamboo shell etc with high e ciency in removing lignin [3,[26][27][28][29]. Endeavour has been committed in optimizing the HBDs including organic or inorganic acids, amino acids, alcohols and sugars.…”

Section: Introductionmentioning

confidence: 99%

Facilely reducing recalcitrance of lignocellulosic biomass by a newly developed ethylamine based deep eutectic solvent for biobutanol fermentation

Xing

et al. 2020

Preprint

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Background: Biobutanol is promising and renewable alternative to traditional fossil fuels and could be produced by Clostridium species from lignocellulosic biomass. However, biomass is recalcitrant to be hydrolyzed into fermentable sugars attributed to the densely packed structure by layers of lignin. Development of pretreatment reagents and processes for increasing surface area, removing hemicellulose and lignin, and enhancing the relative content of cellulose is currently an area of great interest. Deep eutectic solvents (DESs), a new class of green solvents, are effective in the pretreatment of lignocellulosic biomass. However, it remains challenging to achieve high titers of total sugars and usually requires combinatorial pretreatment with other reagents. In this study, we aim to develop novel DESs with high application potential in biomass pretreatment and high biocompatibility for biobutanol fermentation.Results: Several DESs with betaine chloride and ethylamine chloride (EaCl) as hydrogen bond acceptors were synthesized. Among them, EaCl:LAC with lactic acid as hydrogen bond donor displayed the best performance in the pretreatment of corncob. Only by single pretreatment with EaCl:LAC, total sugars of as high as 53.5 g·L–1 could be reached. Consecutive batches for pretreatment of corncob were performed using gradiently decreased cellulase by 5 FPU·g–1. At the end of the sixth batch, the concentration and specific yield of total sugars were 58.8 g·L–1 and 706 g·kg–1 pretreated corncob, saving a total of 50% cellulase. Utilizing hydrolysate as carbon source, butanol titer of 10.4 g·L–1 was achieved with butanol yield of 137 g·kg–1 pretreated corncob by Clostridium saccharobutylicum DSM13864.Conclusions: Ethylamine and lactic acid based deep eutectic solvent is promising in pretreatment of corncob with high total sugar concentrations and compatible for biobutanol fermentation. This study provides an efficient pretreatment reagent for facilely reducing recalcitrance of lignocellulosic materials and a promising process for biobutanol fermentation from renewable biomass.

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Enhancing the enzymatic saccharification of bamboo shoot shell by sequential biological pretreatment with Galactomyces sp. CCZU11-1 and deep eutectic solvent extraction

Cited by 38 publications

References 47 publications

Advanced Bioethanol Production: From Novel Raw Materials to Integrated Biorefineries

Advanced Bioethanol Production: From Novel Raw Materials to Integrated Biorefineries

Facilely reducing recalcitrance of lignocellulosic biomass by a newly developed ethylamine-based deep eutectic solvent for biobutanol fermentation

Facilely reducing recalcitrance of lignocellulosic biomass by a newly developed ethylamine based deep eutectic solvent for biobutanol fermentation

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