Ethanolic fermentation of sucrose, sugarcane juice and molasses by Escherichia coli strain ko11 and Klebsiella oxytoca strain P2
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Escherichia coli KO11 and Klebsiella oxytoca P2 recombinants fermented sucrose to ethanol. In minimal medium with 2% or 12% added sucrose KO11 produced 75% and 41%, respectively, of the maximum theoretical yield (0.54g ethanol/g sucrose). In Luria-Bertani (LB) broth with up to 8% sucrose, KO11 presented a 94-96% yield and with 12% sucrose, KO11 presented about 69% yield (44.5g ethanol/L). P2 presented 55% of the theoretical maximum yield in minimal medium supplemented with 2% sucrose and 47% of the maximum in 12% sucrose. In LB broth with 2 or 4% sucrose, P2 presented 94-95% of the theoretical maximum yield, which fell to 73% with 8% added sucrose (31.4g ethanol/L) and 58% with 12% sucrose (37.5 g/L). Volumetric productivity in LB broth containing 2% sucrose was 0.41 g/L/h for KO11 and 1.1 g/L/h for P2, while in LB broth with 12% added sucrose, productivity was 0.96 g/L/h (KO11) and 1.4 g/L/h (P2). During fermentation of sugar cane juice by E. coli KO11 and K. oxytoca P2 produced 39.4 g/L and 42.1 g/L ethanol when supplemented with 0.5% yeast extract, micronutrients and thiamine. In sugar cane juice supplemented with LB broth ingredients, KO11 ethanol fermentation was inhibited with production of only 23.0 g ethanol/L, while P2 produced 44.2 g/L. Ethanol production by KO11 and P2, respectively, in sugarcane juice was a) 25.3 and 30.2 g/L with 0.2% ammonium sulfate, b) 24.9 and 31.6 g/L with ammonium sulfate and micronutrients, c) 25.6 and 37.5 g/L with ammonium sulfate, micronutrients and thiamine. During molasses fermentation E. coli KO11 presented low ethanol production and high lactic acid production. K. oxytoca P2 produced 25 g ethanol/L in molasses diluted 10-fold in water, with or without addition of 0.5% yeast extract, and 27.8 g/L with addition of LB broth ingredients after 96h. P2 produced 24.5, 26.9, and 28.0 g ethanol/L in molasses diluted 10-fold in vinasse, vinasse with 0.5% added yeast extract and with LB broth ingredients, respectively.
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Several types of microorganisms such as bacteria, yeasts, and fungi have been identified for their potential to ferment sugars to bioethanol.
“Several types of microorganisms, such as bacteria, yeasts, and fungi, have been identified for their potential for fermenting sugars to bioethanol [123–125].”
From The promising future of microalgae: Current status, challenges, and optimization of a sustainable and renewable industry for biofuels, feed, and other products (2018) · cites this paper as [125]
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- Authors
- Silva, G. P. D., Araújo, E. F. D., Silva, D. O., & Guimarães, W. V.
- Affiliations
- Universidade do Estado da Bahia (BR)
- Universidade Federal de Viçosa (BR)
- Venue
- Brazilian Journal of Microbiology
- Publisher
- FapUNIFESP (SciELO)
- Published
- 2005-12
- Volume
- 36
- Issue
- 4
- Pages
- 395-404
- ISSN
- 1517-8382 (ISSN-L)
- OpenAlex
- W2140406573
- Cited by
- 55
- References
- 32
- Citations by year
- 2026: 1 · 2025: 2 · 2024: 5 · 2023: 1 · 2022: 2 · 2021: 5 · 2020: 1 · 2019: 1 · 2018: 2 · 2017: 2 · 2016: 4 · 2015: 4 · 2014: 3 · 2013: 3 · 2012: 9
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- cc-by-nc
- Locations
- Brazilian Journal of Microbiology (publishedVersion, cc-by-nc)
- LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (publishedVersion, other-oa)
- Americanae (AECID Library) (submittedVersion, other-oa)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Funders
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Financiadora de Estudos e Projetos
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Biofuel production and bioconversion
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Biochemical and biochemical processes
- Keywords
- sucrose fermentation, ethanol production, sugarcane juice, molasses, recombinant yeast, ethanol yield, volumetric productivity, fermentation inhibition, ammonium sulfate, thiamine, yeast extract, micronutrients, yeast assimilable nitrogen
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