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Energies 2018, 11(8), 2026; https://doi.org/10.3390/en11082026

Prospecting for Oleaginous and Robust Chlorella spp. for Coal-Fired Flue-Gas-Mediated Biodiesel Production

1
Advanced Biomass R&D Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
2
Aquatic Biology Laboratory, and Renewable Materials and Nanotechnology Group, KU Leuven, Campus Kulak, 8500 Kortrijk, Belgium
3
Biomass and Waste Energy Laboratory, Korea Institute of Energy Research (KIER), Daejeon 34129, Korea
4
Graduate School of Energy Science and Technology, Chungnam National University (CNU), Daejeon 34134, Korea
5
School of Chemical and Biomolecular Engineering, Pusan National University (PNU), Busan 46241, Korea
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 2 July 2018 / Revised: 30 July 2018 / Accepted: 1 August 2018 / Published: 3 August 2018
(This article belongs to the Special Issue Biofuel and Bioenergy Technology)
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Abstract

Prospecting for robust and high-productivity strains is a strategically important step in the microalgal biodiesel process. In this study, 30 local strains of Chlorella were evaluated in photobioreactors for biodiesel production using coal-fired flue-gas. Three strains (M082, M134, and KR-1) were sequentially selected based on cell growth, lipid content, and fatty acid composition under autotrophic and mixotrophic conditions. Under autotrophic conditions, M082 and M134 showed comparable lipid contents (ca. 230 mg FAME [fatty acid methyl esters derived from microalgal lipids]/g cell) and productivities (ca. 40 mg FAME/L·d) versus a reference strain (KR-1) outdoors with actual flue-gas (CO2, 13%). Interestingly, under mixotrophic conditions, M082 demonstrated, along with maximal lipid content (397 mg FAME/g cell), good tolerance to high temperature (40 °C). Furthermore, the fatty acid methyl esters met important international standards under all of the tested culture conditions. Thus, it was concluded that M082 can be a feedstock of choice for coal-fired, flue-gas-mediated biodiesel production. View Full-Text
Keywords: Chlorella; coal-fired flue-gas; screening; biodiesel property; mixotrophic cultivation Chlorella; coal-fired flue-gas; screening; biodiesel property; mixotrophic cultivation
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Kim, B.; Praveenkumar, R.; Choi, E.; Lee, K.; Jeon, S.G.; Oh, Y.-K. Prospecting for Oleaginous and Robust Chlorella spp. for Coal-Fired Flue-Gas-Mediated Biodiesel Production. Energies 2018, 11, 2026.

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