Isolation and Characterization of Xylose Fermenting Yeast from  Different Fruits for Bioethanol Production

Modi, Krunal; Joshi, B; Patel, Prittesh

doi:10.20546/ijcmas.2018.701.292

Cited by 6 publications

(3 citation statements)

References 18 publications

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“…The hexose sugars (glucose, galactose, and mannose) in hemicellulose are efficiently converted to ethanol by the traditional fermenting yeast, S. cerevisiae ; however, pentose sugars (D-xylose and L-arabinose) are not naturally fermented by S. cerevisiae . It is crucial to convert both hexose and pentose sugars to bioethanol for the process to be economically feasible [ 12 ].…”

Section: Discussionmentioning

confidence: 99%

“…Fermentation of glucose to bioethanol by yeasts is well known, while the ability of microorganisms to convert D-xylose and L-arabinose to ethanol is often problematic. This is due to the lack of robust microorganisms that can ferment pentose sugars effectively in the presence of inhibitors, like acetic acid released during pretreatment at elevated temperatures [ 11 , 12 ]. One approach to improve pentose-fermenting yeasts in the presence of inhibitors and high temperatures is adaptation or evolutionary engineering [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

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The Improvement of Bioethanol Production by Pentose-Fermenting Yeasts Isolated from Herbal Preparations, the Gut of Dung Beetles, and Marula Wine

Moremi

Rensburg

Grange

2020

International Journal of Microbiology

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Efficient conversion of pentose sugars to ethanol is important for an economically viable lignocellulosic bioethanol process. Ten yeasts fermenting both D-xylose and L-arabinose were subjected to an adaptation process with L-arabinose as carbon source in a medium containing acetic acid. Four Meyerozyma caribbica-adapted strains were able to ferment L-arabinose to ethanol in the presence of 3 g/L acetic acid at 35°C. Meyerozyma caribbica Mu 2.2f fermented L-arabinose to produce 3.0 g/L ethanol compared to the parental strain with 1.0 g/L ethanol in the absence of acetic acid. The adapted M. caribbica Mu 2.2f strain produced 3.6 and 0.8 g/L ethanol on L-arabinose and D-xylose, respectively, in the presence of acetic acid while the parental strain failed to grow. In a bioreactor, the adapted M. caribbica Mu 2.2f strain produced 5.7 g/L ethanol in the presence of 3 g/L acetic acid with an ethanol yield and productivity of 0.338 g/g and 0.158 g/L/h, respectively, at a KLa value of 3.3 h−1. The adapted strain produced 26.7 g/L L-arabitol with a yield of 0.900 g/g at a KLa value of 4.9 h−1.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Improvement of Bioethanol Production by Pentose-Fermenting Yeasts Isolated from Herbal Preparations, the Gut of Dung Beetles, and Marula Wine

Moremi

Rensburg

Grange

2020

International Journal of Microbiology

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“…The use of fossil fuels as the main source of energy for most countries has had a negative impact on the environment, namely global warming and air pollution (Martins et al, 2019). To address environmental problems and the progressive shortage of combustible feedstocks, great efforts are being made to develop economically viable biotechnology techniques (Modi, Joshi, et Patel, 2018) that would allow the use of fossil fuels to be replaced by the wider use of biomass and renewable sources as a whole, i.e. without limitation of feedstock composition and sources.…”

Section: Introductionmentioning

confidence: 99%

Isolation and Characterization of Enterobacter sp Capable towards Tolerating Degradation Products and Fermenting Pentoses

Ouahbi,

Asli,

Benlemlih

2023

jobe

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The depletion of fossil fuel resources, in addition to the growing demand for energy, has prompted the development of renewable energies, including bioethanol from lignocellulosic biomass. The acid pretreatment of hemicellulose releases inhibiting compounds in addition to xylose. With the possibility of exploitation of lignocellulose as a fermentation substrate, we isolated an Enterobacter characterized by its ability to ferment xylose and tolerate high concentrations of inhibitors. The selection was performed in media containing different carbon and energy sources; glucose, cellobiose, CMC, furfural and 5-HMF. Characterization strategies of the selected strain such as, xylose concentration (from 25 g liter-1 to 100 g liter-1), furfural (0 mM to 25 mM), cell immobilization, were used to quantify the maximum yield of ethanol produced. The results obtained show that our strain can ferment up to 100 g liter-1 of xylose in the presence of 20 mM furfural at 37°C to produce ethanol with a maximum yield of 2.22 g liter- 1 for 24 h under 160 rpm magnetic stirring. The results obtained in this study suggest that the isolated Enterobacter sp. is a promising strain for the bioconversion of lignocellulosic biomass pretreatment hydrolysate into bioethanol.

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Bioethanol production from leftover food by yeasts isolated from fruit at Ambo University, Ethiopia

Sisay,

keneni,

Kumsa

2023

Environ Dev Sustain

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Isolation and Characterization of Xylose Fermenting Yeast from Different Fruits for Bioethanol Production

Cited by 6 publications

References 18 publications

The Improvement of Bioethanol Production by Pentose-Fermenting Yeasts Isolated from Herbal Preparations, the Gut of Dung Beetles, and Marula Wine

The Improvement of Bioethanol Production by Pentose-Fermenting Yeasts Isolated from Herbal Preparations, the Gut of Dung Beetles, and Marula Wine

Isolation and Characterization of Enterobacter sp Capable towards Tolerating Degradation Products and Fermenting Pentoses

Bioethanol production from leftover food by yeasts isolated from fruit at Ambo University, Ethiopia

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