Candida intermedia CBS 141442: A novel glucose/xylose co-fermenting isolate for lignocellulosic bioethanol production

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Moreno, A. D.Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas (Ciemat),Chalmers tekniska högskola,Chalmers University of Technology (author)

Candida intermedia CBS 141442: A novel glucose/xylose co-fermenting isolate for lignocellulosic bioethanol production

Article/chapterEnglish2020

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2020-10-15
MDPI AG,2020
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LIBRIS-ID:oai:research.chalmers.se:8c70d7f7-2862-4a13-a4d5-bd79900ea77d
https://doi.org/10.3390/en13205363DOI
https://research.chalmers.se/publication/519938URI

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Language:English
Summary in:English

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The present study describes the isolation of the novel strain Candida intermedia CBS 141442 and investigates the potential of this microorganism for the conversion of lignocellulosic streams. Different C. intermedia clones were isolated during an adaptive laboratory evolution experiment under the selection pressure of lignocellulosic hydrolysate and in strong competition with industrial, xylose-fermenting Saccharomyces cerevisiae cells. Isolates showed different but stable colony and cell morphologies when growing in a solid agar medium (smooth, intermediate and complex morphology) and liquid medium (unicellular, aggregates and pseudohyphal morphology). Clones of the same morphology showed similar fermentation patterns, and the C. intermedia clone I5 (CBS 141442) was selected for further testing due to its superior capacity for xylose consumption (90% of the initial xylose concentration within 72 h) and the highest ethanol yields (0.25 ± 0.02 g ethanol/g sugars consumed). Compared to the well-known yeast Scheffersomyces stipitis, the selected strain showed slightly higher tolerance to the lignocellulosic-derived inhibitors when fermenting a wheat straw hydrolysate. Furthermore, its higher glucose consumption rates (compared to S. stipitis) and its capacity for glucose and xylose co-fermentation makes C. intermedia CBS 141442 an attractive microorganism for the conversion of lignocellulosic substrates, as demonstrated in simultaneous saccharification and fermentation processes.

Subject headings and genre

NATURVETENSKAP Biologi Mikrobiologi hsv//swe
NATURAL SCIENCES Biological Sciences Microbiology hsv//eng
TEKNIK OCH TEKNOLOGIER Industriell bioteknik Biokatalys och enzymteknik hsv//swe
ENGINEERING AND TECHNOLOGY Industrial Biotechnology Biocatalysis and Enzyme Technology hsv//eng
TEKNIK OCH TEKNOLOGIER Industriell bioteknik Annan industriell bioteknik hsv//swe
ENGINEERING AND TECHNOLOGY Industrial Biotechnology Other Industrial Biotechnology hsv//eng
Yeast robustness
Biofuels
Simultaneous saccharification and fermentation
Yeast morphology
Cell factory

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Tomas-Pejo, Elia,1980Chalmers tekniska högskola,Chalmers University of Technology,Instituto IMDEA Energía,IMDEA Energy Institute(Swepub:cth)elia (author)
Olsson, Lisbeth,1963Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)lisbetho (author)
Geijer, Cecilia,1980Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)cecgei (author)
Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas (Ciemat)Chalmers tekniska högskola (creator_code:org_t)

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In:Energies: MDPI AG13:201996-10731996-1073

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