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Identification of naturally isolated Southern Louisiana's algal strains and the effect of higher CO 2 content on fatty acid profiles for biodiesel production
Author(s) -
Moreno Reynaldo,
Aita Giovanna M.,
Madsen Lee,
Gutierrez Dina L.,
Yao Shaomian,
Hurlburt Barry,
Brashear Suzanne
Publication year - 2013
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.3930
Subject(s) - chlorella sorokiniana , chlorella vulgaris , biodiesel , biology , biodiesel production , food science , chlorella , fatty acid , biomass (ecology) , aeration , scenedesmus , botany , algae , biochemistry , agronomy , ecology , catalysis
BACKGROUND: Microalgae, with both high biomass productivity and oil content, are regarded as attractive candidates for the production of alternative biodiesel as well as for CO 2 biofixation. In the present study, four microalgal strains native to southeastern Louisiana's waters were isolated and identified to evaluate their potential for the production of biodiesel. Selected strains were identified through genomic DNA in sequencing of either 16S rRNA or 18S rRNA genes followed by lipid and fatty acid content characterization and quantification. RESULTS: High correlation was found with known nucleotide sequence identities at 98% with Sellaphora pupula , and 99% with Synechococcus sp., Chlorella sorokiniana , Scenedesmus abundans , and Chlorella vulgaris (control). The fatty acid profiles of these organisms changed when using 5% CO 2 aeration. Total fatty acids ( TFA ) decreased from 20.63 to 17.62, 54.83 to 24.4, and 29.82 to 23.99 g kg −1 in Synechococcus sp., Sellaphora pupula and Chlorella sorokiniana , respectively. TFA increased from 14.14 to 31.49 and 15.14 to 47.52 g kg −1 dry biomass in Scenedesmus abundans and Chlorella vulgaris (control), respectively. CONCLUSION: Chlorella sorokiniana , with a lower C18 :3 and the highest biomass yield at 5% CO 2 aeration, was found to be the best candidate for biodiesel production. © 2012 Society of Chemical Industry