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KMID : 1024520190280110927
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Journal of the Environmental Sciences
2019 Volume.28 No. 11 p.927 ~ p.933
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Higher Production of Biolipids from Botryococcus braunii using Pre-treated Solvent Extraction Methods
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Kwon Sung-Hyun
Cho Dae-Chul
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Abstract
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A lipid-enriched strain of Botryococcus braunii (UTEX 572) was cultivated in a semi-batch aeration tank to enhance biomass as well as to develop intracellular lipids and fatty acids. A 30 day period of incubation produced 1.39 g/L of biomass and 0.31 g/L of total lipids in the biomass. The grown biomass was pre-treated using several methods to extract the total lipid content efficiently: ultrasonication was found to yield the highest percentage of lipids-namely 19.8% per biomass. Direct heating of biomass in an autoclave also showed better performance than when using only conventional solvent extraction. To enhance the biomass harvest and lipid extraction efficiency, coagulation and flocculation steps were added to the extraction process. It is noteworthy that not only the solvent type but also the solvent/biomass ratio greatly affected efficiency. In addition, the moisture content of the harvested(wet) biomass affected the efficiency significantly. This study elucidated the need for future research on optimizing this extraction process.
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KEYWORD
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Botryococcus braunii, Biolipid production, Pre-treated solvent extraction, Semi-batch cultivation
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