Isolation and Characterization of Novel Chlorella Species with Cold Resistance and High Lipid Accumulation for Biodiesel Production

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Chlorella spp. are green algae that are found across wide-ranging habitats from deserts to arctic regions, with various strains having adapted to survive under diverse environmental conditions. In this study, two novel Chlorella strains (ABC-002, ABC-008) were isolated from a freshwater lake in South Korea during the winter season and examined for possible use in the biofuel production process. The comparison of ABC-002 and ABC-008 strains with Chlorella vulgaris UTEX265 under two different temperatures (10 degrees C, 25 degrees C) revealed their cold-tolerant phenotypes as well as high biomass yields. The maximum quantum yields of UTEX25, ABC-002, and ABC-008 at 10 degrees C were 0.5594, 0.6747, and 0.7150, respectively, providing evidence of the relatively higher cold-resistance capabilities of these two strains. Furthermore, both the biomass yields and lipid content of the two novel strains were found to be higher than those of UTEX265; the overall lipid productivities of ABC-002 and ABC-008 were 1.7 similar to 2.8 fold and 1.6 similar to 4.2 fold higher compared to that of UTEX265, respectively. Thus, the high biomass and lipid productivity over a wide range of temperatures indicate that C. vulgaris ABC-002 and ABC-008 are promising candidates for applications in biofuel productions via outdoor biomass cultivation.
Publisher
KOREAN SOC MICROBIOLOGY & BIOTECHNOLOGY
Issue Date
2019-06
Language
English
Article Type
Article
Citation

JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY, v.29, no.6, pp.952 - 961

ISSN
1017-7825
DOI
10.4014/jmb.1904.04008
URI
http://hdl.handle.net/10203/263753
Appears in Collection
CBE-Journal Papers(저널논문)
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