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- Title
Influence of different reactor types on Nannochloropsis oculata microalgae culture for lipids and fatty acid production.
- Authors
Martínez‐Macias, Maria del Rosario; Aguilar‐Ruiz, Rocio Janeth; Nateras‐Ramírez, Omar; Sánchez‐Machado, Dalia Isabel; López‐Cervantes, Jaime; Dévora‐Isiordia, Germán Eduardo; Álvarez‐Sánchez, Jesús; Ríos‐Vázquez, Nidia Josefina
- Abstract
Greenhouse gases emitted into the atmosphere by burning of fossil fuels cause global warming. One option is obtaining biodiesel. Nannochloropsis oculata was cultured under different light intensities and reactors at 25°C for 21 days with f/2 medium to assess their effects on cell density, lipid, and fatty acids (FAs). N. oculata improved cell density on fed‐batch glass tubular reactor (7 L) at 200 μmol E m−2 s−1, yielding 3.5 × 108 cells ml−1, followed by fed‐batch Erlenmeyer flask (1 L) at 650 μmol E m−2 s−1 with 1.7 × 108 cells ml−1. The highest total lipid contents (% g lipid × g dry biomass−1) were 44.4 ± 0.8% for the reactor (1 L) at 650 μmol E m−2 s−1 and 35.2 ± 0.2% for the tubular reactor (7 L) at 200 μmol E m−2 s−1, until twice as high compared with the control culture (Erlenmeyer flask 1 L, 80 μmol E m−2 s−1) with 21.2 ± 1%. Comparing the total lipid content at 200 μmol E m−2 s−1, tubular reactor (7 L) and reactor 1 L achieved 35.2 ± 0.2% and 28.3 ± 1%, respectively, indicating the effect of shape reactor. The FAs were affected by high light intensity, decreasing SFAs to 2.5%, and increased monounsaturated fatty acids + polyunsaturated fatty acids to 2.5%. PUFAs (20:5n‐3) and (20:4n‐3) were affected by reactor shape, decreasing by half in the tubular reactor. In the best culture, fed‐batch tubular reactor (7 L) at 200 μmol E m−2 s−1 contains major FAs (16:0; 38.06 ± 0.16%), (16:1n‐7; 30.74 ± 0.58%), and (18:1n‐9; 17.15 ± 0.91%).
- Subjects
MONOUNSATURATED fatty acids; FATTY acids; TUBULAR reactors; UNSATURATED fatty acids; MICROALGAE
- Publication
Journal of the American Oil Chemists' Society (JAOCS), 2021, Vol 98, Issue 10, p993
- ISSN
0003-021X
- Publication type
Article
- DOI
10.1002/aocs.12526