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Mixotrophic Cultivation of Dunaliella salina on Crude Glycerol Obtained from Calcinated Fatty Acid Production Process
- Source :
- Russian Journal of Marine Biology. 45:470-480
- Publication Year :
- 2019
- Publisher :
- Pleiades Publishing Ltd, 2019.
-
Abstract
- Dunaliella salina is a unicellular microalga with the potential of industrial applications. Commercial-scale cultivation of D. salina requires extensive efforts on cost reduction. This can be achieved by minimization of nutrient cost and maximization of specific growth rate and productivity. To this end, in this study, mixotrophic cultivation of D. salina on crude glycerol (by-product of calcinated-fatty acid (CaFA) production process) was investigated in shake flasks and the influences on protein, carotenoid and chlorophyll contents of the cells were studied. The highest maximum specific growth rate and biomass productivity was achieved by cultivation on 2.5 g/L crude glycerol. The protein content was more than two folds and the carotenoid content was more than 60% higher than that of autotrophic cultivation. Subsequently, continuous cultivation of D. salina on crude glycerol in a helical photobioreactor was performed at the dilution rate of 0.52/d. The biomass productivity of 2.3 × 106 cell/(mL d) was achieved which was more than 75% of the values for previously reported autotrophic cultivations. Conclusively, continuous cultivation of D. salina on by-product of CaFA production process could be a potential process technology for production of D. Salina.
- Subjects :
- 0106 biological sciences
chemistry.chemical_classification
biology
010604 marine biology & hydrobiology
Biomass
Photobioreactor
04 agricultural and veterinary sciences
Aquatic Science
Oceanography
biology.organism_classification
01 natural sciences
chemistry.chemical_compound
chemistry
Chlorophyll
040102 fisheries
Glycerol
Dunaliella salina
0401 agriculture, forestry, and fisheries
Food science
Autotroph
Carotenoid
Mixotroph
Subjects
Details
- ISSN :
- 16083377 and 10630740
- Volume :
- 45
- Database :
- OpenAIRE
- Journal :
- Russian Journal of Marine Biology
- Accession number :
- edsair.doi...........a08b181c01059400304c3073a4669650