Cited by 113Algal biology and biofuel productionBiofuel production and bioconversionMicrobial Metabolic Engineering and Bioproduction

Co-production of biodiesel and bioethanol using psychrophilic microalga Chlamydomonas sp. KNM0029C isolated from Arctic sea ice

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Kim, Eun Jae, Kim, Sanghee, Choi, Han-Gu, Han, Se Jong·2020·Biotechnology for Biofuels

Abstract

Background: Biofuels, generated using microalgae as sustainable energy, have received a lot of attention. Microalgae can be cultivated at low cost with CO 2 and solar energy without competition from edible crops. Psychrophilic microalgae can be a suitable feedstock to produce biofuels without the environmental constraints of low temperatures, because they can grow below 10 °C. However, there is a lack of efficient strategies using psychrophilic microalgae to produce biodiesel and bioethanol. Therefore, the current study aimed to optimize the production of biodiesel and bioethanol from Arctic Chlamydomonas sp. KNM0029C at low temperatures. Results: After incubation in a 20-L photobioreactor, fatty acid methyl ester (FAME) was extracted using modified FAME extraction methods, producing a maximum yield of 0.16-g FAME/g KNM0029C. Residual biomass was pretreated for bioethanol production, and the yields from different methods were compared. The highest bioethanol yield (0.22-g/g residual biomass) was obtained by pretreatment with enzyme (amyloglucosidase) after sonication. Approximately 300-mg biofuel was obtained, including 156-mg FAME biodiesel and 144-mg bioethanol per g dried cells, representing the highest recorded yield from psychrophilic microalgae. Conclusions: This is the first to attempt at utilizing biomass from psychrophilic Arctic microalga Chlamydomonas sp. KNM0029C for the co-production of bioethanol and biodiesel, and it yielded the highest values among reported studies using psychrophilic organisms. These results can be used as a source for the efficient biofuel production using polar microalgae.

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Authors
Kim, E. J., Kim, S., Choi, H.-G., & Han, S. J.
Affiliations
Korea Polar Research Institute (KR)
Corresponding author
Han, Se Jong
Venue
Biotechnology for Biofuels
Published
2020-02-01
Volume
13
Issue
1
Pages
20-20
ISSN
1754-6834 (ISSN-L)
OpenAlex
W3010865578
Cited by
113
References
51
Citations by year
2026: 10 · 2025: 20 · 2024: 8 · 2023: 19 · 2022: 19 · 2021: 25 · 2020: 12
FWCI
3.71
Type
journal article
Language
en
Open access
Locations
  • Biotechnology for Biofuels (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
Korea Polar Research Institute (PE19180, PE20150)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
  • Physical Sciences › Engineering › Biomedical Engineering › Biofuel production and bioconversion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
Keywords
Arctic sea ice, biodiesel, bioethanol, co-production, fatty acid methyl esters, glucoamylase, sonication, low-temperature cultivation, photobioreactors, biofuel yield

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