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

Cited 4 time in wos
Cited 10 time in scopus
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Title
Co-production of biodiesel and bioethanol using psychrophilic microalga Chlamydomonas sp. KNM0029C isolated from Arctic sea ice
Other Titles
북극 해빙 유래 호냉성 미세조류 Chlamydomonas sp. KNM0029C를 이용한 바이오디젤과 바이오에탄올의 생산
Authors
Kim, Eun Jae
Kim, Sanghee
Choi, Han-Gu
Han, Se Jong
Subject
Biotechnology & Applied Microbiology; Energy & Fuels
Keywords
Arctic; Biodiesel; Bioethanol; Chlamydomonas; Psychrophilic microalgae
Issue Date
2020-02
Citation
Kim, Eun Jae, et al. 2020. "Co-production of biodiesel and bioethanol using psychrophilic microalga Chlamydomonas sp. KNM0029C isolated from Arctic sea ice". BIOTECHNOLOGY FOR BIOFUELS, 13(1): 1-13.
Abstract
Biofuels, generated using microalgae, as sustainable energy have received a lot of attention. Microalgae can be cultivated at low cost with CO2 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. 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. 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.
URI
https://repository.kopri.re.kr/handle/201206/11007
DOI
http://dx.doi.org/10.1186/s13068-020-1660-z
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