Extraction of lipids from microalgae by ultrasound application: Prospection of the optimal extraction method

► Bligh and Dyer method assisted by ultrasound resulted in the highest extraction of oil. ► Addition of powder silica did not improve the extraction of oil. ► Diffusion mechanism was more important than cell rupture during extraction. ► Polar solvent systems improve the extraction of microalgae oil....

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Bibliographic Details
Published in:Ultrasonics sonochemistry 2013-01, Vol.20 (1), p.95-98
Main Authors: Araujo, Glacio S., Matos, Leonardo J.B.L., Fernandes, Jader O., Cartaxo, Samuel J.M., Gonçalves, Luciana R.B., Fernandes, Fabiano A.N., Farias, Wladimir R.L.
Format: Article
Language:English
Subjects:
Chemical Fractionation - methods
Chemistry
Chlorella vulgaris - chemistry
Exact sciences and technology
Extraction
General and physical chemistry
Lipid
Lipids - isolation & purification
Microalgae
Microalgae - chemistry
Oil
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Silica
Silicon Dioxide - chemistry
Ultrasonic chemistry
Ultrasonics - methods
Ultrasound
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Summary:► Bligh and Dyer method assisted by ultrasound resulted in the highest extraction of oil. ► Addition of powder silica did not improve the extraction of oil. ► Diffusion mechanism was more important than cell rupture during extraction. ► Polar solvent systems improve the extraction of microalgae oil. Microalgae have the ability to grow rapidly, synthesize and accumulate large amounts (approximately 20–50% of dry weight) of lipids. A successful and economically viable algae based oil industry will depend on the selection of appropriate microalgal strains and the selection of the most suitable lipid extraction method. In this paper, five extraction methods were evaluated regarding the extraction of lipids from Chlorella vulgaris: Bligh and Dyer, Chen, Folch, Hara and Radin, and Soxhlet. Furthermore, the addition of silica powder was studied to evaluate the introduction of more shear stress to the system as to increase the disruption of cell walls. Among the studied methods, the Bligh and Dyer method assisted by ultrasound resulted in the highest extraction of oil from C. vulgaris (52.5% w/w). Addition of powder silica did not improve the extraction of oil.
ISSN:1350-4177
1873-2828
DOI:10.1016/j.ultsonch.2012.07.027