Ultrasound-assisted in-situ transesterification of wet Aurantiochytrium sp KRS 101 using potassium carbonate

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A new in-situ transesterification method was developed for wet biomass: K2CO3 was used as an alkaline catalyst and, Aurantiochytrium sp. KRS 101 as oleaginous DHA-producing microalgae. It was found that the presence of water greatly impaired the overall efficiency even with the powerful catalyst that had worked surpassingly well with dry biomass, and thus a mechanical aid like ultrasonication was needed to make advantage of full potential of the alkaline catalyst. The total fatty acid ethyl ester (FAEE) recovery yield of 94.6% was achieved with sonication at 100 g/L of biomass (40% moisture), 3% of K2CO3, 70 degrees C and 30 min. All these suggest that the ultrasound assisted in-situ transesterification can offer a feasible means for FAEE recovery and it was so by way of overcoming the physical limitation of mass transfer caused the presence of water and providing effective contacts between reactants.
Publisher
ELSEVIER SCI LTD
Issue Date
2018-08
Language
English
Article Type
Article
Citation

BIORESOURCE TECHNOLOGY, v.261, pp.117 - 121

ISSN
0960-8524
DOI
10.1016/j.biortech.2018.03.099
URI
http://hdl.handle.net/10203/243990
Appears in Collection
CE-Journal Papers(저널논문)
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