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Open AccessArticle

Optimization of Light Intensity and NaNO3 Concentration in Amazon Cyanobacteria Cultivation to Produce Biodiesel

1
Laboratory of Oils of the Amazon, Guamá Science and Technology Park, Federal University of Pará, Belém, Pará 66075-750, Brazil
2
Graduate Program in Biotechnology, Federal University of Pará, Belém, Pará 66075-110, Brazil
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Graduate Program in Chemistry, Federal University of Pará, Belém, Pará 66075-110, Brazil
*
Author to whom correspondence should be addressed.
Molecules 2019, 24(12), 2326; https://doi.org/10.3390/molecules24122326
Received: 10 April 2019 / Revised: 1 May 2019 / Accepted: 15 May 2019 / Published: 24 June 2019
(This article belongs to the Special Issue Microalgae for Production of Bioproducts and Biofuels)
The objective of this study, for the first time, was to optimize Amazonian cyanobacterial culture conditions for improving cell productivity and lipid content, by analyzing the effect of light intensity and nitrogen concentration, for empirically evaluating biodiesel quality parameters. The strains Synechocystis sp. CACIAM05, Microcystis aeruginosa CACIAM08, Pantanalinema rosaneae CACIAM18, and Limnothrix sp. CACIAM25, were previously identified by morphological and molecular analysis (16S rRNA) and were selected based on their production of chlorophyll a and dry cell weight. Then, factorial planning (22) with central points was applied, with light intensity and NaNO3 concentration as independent variables. As response variables, cell productivity and lipid content were determined. Statistical analysis indicated that for all strains, the independent variables were statistically significant for cell productivity. Analysis of the fatty acid composition demonstrated diversity in the composition of the fatty acid profile from the experimental planning assays of each strain. The Biodiesel Analyzer software predicted the biodiesel quality parameters. CACIAM05 and CACIAM25 obtained better parameters with low levels of light intensity and NaNO3 concentration, whereas CACIAM08 and CACIAM18 obtained better parameters with low NaNO3 concentrations and high luminous intensity. View Full-Text
Keywords: cyanobacteria; lipids; cultivation optimization; biodiesel quality parameters cyanobacteria; lipids; cultivation optimization; biodiesel quality parameters
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Aboim, J.B.; Oliveira, D.T.; Mescouto, V.A.; dos Reis, A.S.; da Rocha Filho, G.N.; Santos, A.V.; Xavier, L.P.; Santos, A.S.; Gonçalves, E.C.; do Nascimento, L.A.S. Optimization of Light Intensity and NaNO3 Concentration in Amazon Cyanobacteria Cultivation to Produce Biodiesel. Molecules 2019, 24, 2326.

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