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Production of Fatty Acids and Protein by Nannochloropsis in Flat-Plate Photobioreactors.
- Source :
-
PloS one [PLoS One] 2017 Jan 19; Vol. 12 (1), pp. e0170440. Date of Electronic Publication: 2017 Jan 19 (Print Publication: 2017). - Publication Year :
- 2017
-
Abstract
- Nannochloropsis is an industrially-promising microalga that may be cultivated for alternative sources of nutrition due to its high productivity, protein content and lipid composition. We studied the growth and biochemical profile of Nannochloropsis 211/78 (CCAP) in optimized flat-plate photobioreactors. Eighteen cultivations were performed at two nutrient concentrations. The fatty acid, protein content and calorific values were analyzed after 8, 12 and 16 days. Neutral lipids were separated and the changes in fatty acids in triglycerides (TAGs) during nutrient depletion were recorded. The maximum cell density reached 4.7 g∙L-1 and the maximum productivity was 0.51 g∙L-1∙d-1. During nutrient-replete conditions, eicosapentaneoic acid (EPA) and total protein concentrations measured 4.2-4.9% and 50-55% of the dry mass, respectively. Nutrient starvation induced the accumulation of fatty acids up to 28.3% of the cell dry weight, largely due to the incorporation of C16:0 and C16:1n-7 fatty acyl chains into neutral lipids. During nutrient starvation the total EPA content did not detectibly change, but up to 37% was transferred from polar membrane lipids to the neutral lipid fraction.<br />Competing Interests: The authors have declared that no competing interests exist.
- Subjects :
- Biomass
Culture Media
Eicosapentaenoic Acid biosynthesis
Equipment Design
Microalgae cytology
Microalgae growth & development
Microalgae metabolism
Stramenopiles cytology
Stramenopiles growth & development
Algal Proteins biosynthesis
Fatty Acids biosynthesis
Photobioreactors
Stramenopiles metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1932-6203
- Volume :
- 12
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- PloS one
- Publication Type :
- Academic Journal
- Accession number :
- 28103296
- Full Text :
- https://doi.org/10.1371/journal.pone.0170440