A strategy for sequential fermentation by Saccharomyces cerevisiae and Pichia stipitis in bioethanol production from hardwoods

Song, Younho; Cho, Eun Jin; Park, Chan Song; Oh, Chi Hoon; Park, Bok-Jae; Bae, Hyeun‐Jong

doi:10.1016/j.renene.2019.03.032

Cited by 52 publications

(14 citation statements)

References 38 publications

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“…Various hardwoods were pretreated with hydrogen peroxide, which highly improved hydrolysis efficiency due to reducing lignin content. Enzymatic hydrolysis was performed using glucan cellulase, which contributed to the increase in production of bioethanol [ 123 ]. In addition, poplar wood was used as substrate and glucan cellulase was used in enzymatic hydrolysis, where 68% yield of fermentation efficiency suggests that acid hydrotrope fractionation has potential in forestry feedstocks for bioethanol producton [ 124 ].…”

Section: Enzymatic Hydrolysismentioning

confidence: 99%

Bioethanol Production by Enzymatic Hydrolysis from Different Lignocellulosic Sources

2021

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As the need for non-renewable sources such as fossil fuels has increased during the last few decades, the search for sustainable and renewable alternative sources has gained growing interest. Enzymatic hydrolysis in bioethanol production presents an important step, where sugars that are fermented are obtained in the final fermentation process. In the process of enzymatic hydrolysis, more and more new effective enzymes are being researched to ensure a more cost-effective process. There are many different enzyme strategies implemented in hydrolysis protocols, where different lignocellulosic biomass, such as wood feedstocks, different agricultural wastes, and marine algae are being used as substrates for an efficient bioethanol production. This review investigates the very recent enzymatic hydrolysis pathways in bioethanol production from lignocellulosic biomass.

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Section: Enzymatic Hydrolysismentioning

confidence: 99%

Bioethanol Production by Enzymatic Hydrolysis from Different Lignocellulosic Sources

2021

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“…Therefore, growing environmental concerns and current energy demands have urged the scientific community, governments, and companies to search for alternative energy sources to reduce dependence on petroleum and fight against climate change [ 3 ]. For these reasons, there is a rising interest in biofuels, in particular second-generation biofuels [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Bioethanol Production from Enzymatic Treatment of Argan Pulp Feedstock

et al. 2021

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Argan pulp is an abundant byproduct from the argan oil process. It was investigated to study the feasibility of second-generation bioethanol production using, for the first time, enzymatic hydrolysis pretreatment. Argan pulp was subjected to an industrial grinding process before enzymatic hydrolysis using Viscozyme L and Celluclast 1.5 L, followed by fermentation of the resulting sugar solution by Saccharomyces cerevisiae. The argan pulp, as a biomass rich on carbohydrates, presented high saccharification yields (up to 91% and 88%) and an optimal ethanol bioconversion of 44.82% and 47.16% using 30 FBGU/g and 30 U/g of Viscozyme L and Celluclast 1.5 L, respectively, at 10%w/v of argan biomass.

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“…The reduction of costs associated with pretreatment and enzyme supply has been a major challenge in bioethanol production from biomass. The costs of chemicals, enzymes, and the electricity used in bioethanol production from woody plants has been reported [ 26 ]. A study found that the cost of hydrogen peroxide and acetic acid individually accounted for 35.71% of the total cost, and the electricity cost incurred during enzymatic hydrolysis accounted for 83% of the total electricity cost for the entire bioethanol production [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

Hydrolysis pattern analysis of xylem tissues of woody plants pretreated with hydrogen peroxide and acetic acid: rapid saccharification of softwood for economical bioconversion

Lee

Cho

et al. 2021

Biotechnol Biofuels

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Background Woody plants with high glucose content are alternative bioresources for the production of biofuels and biochemicals. Various pretreatment methods may be used to reduce the effects of retardation factors such as lignin interference and cellulose structural recalcitrance on the degradation of the lignocellulose material of woody plants. Results A hydrogen peroxide-acetic acid (HPAC) pretreatment was used to reduce the lignin content of several types of woody plants, and the effect of the cellulose structural recalcitrance on the enzymatic hydrolysis was analyzed. The cellulose structural recalcitrance and the degradation patterns of the wood fibers in the xylem tissues of Quercus acutissima (hardwood) resulted in greater retardation in the enzymatic saccharification than those in the tracheids of Pinus densiflora (softwood). In addition to the HPAC pretreatment, the application of supplementary enzymes (7.5 FPU cellulase for 24 h) further increased the hydrolysis rate of P. densiflora from 61.42 to 91.94% whereas the same effect was not observed for Q. acutissima. It was also observed that endoxylanase synergism significantly affected the hydrolysis of P. densiflora. However, this synergistic effect was lower for other supplementary enzymes. The maximum concentration of the reducing sugars produced from 10% softwood was 89.17 g L−1 after 36 h of hydrolysis with 15 FPU cellulase and other supplementary enzymes. Approximately 80 mg mL−1 of reducing sugars was produced with the addition of 7.5 FPU cellulase and other supplementary enzymes after 36 h, achieving rapid saccharification. Conclusion HPAC pretreatment removed the interference of lignin, reduced structural recalcitrance of cellulose in the P. densiflora, and enabled rapid saccharification of the woody plants including a high concentration of insoluble substrates with only low amounts of cellulase. HPAC pretreatment may be a viable alternative for the cost-efficient production of biofuels or biochemicals from softwood plant tissues.

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A strategy for sequential fermentation by Saccharomyces cerevisiae and Pichia stipitis in bioethanol production from hardwoods

Cited by 52 publications

References 38 publications

Bioethanol Production by Enzymatic Hydrolysis from Different Lignocellulosic Sources

Bioethanol Production by Enzymatic Hydrolysis from Different Lignocellulosic Sources

Optimization of Bioethanol Production from Enzymatic Treatment of Argan Pulp Feedstock

Hydrolysis pattern analysis of xylem tissues of woody plants pretreated with hydrogen peroxide and acetic acid: rapid saccharification of softwood for economical bioconversion

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