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Cultivation of Scenedesmus obliquus in photobioreactors: effects of light intensities and light-dark cycles on growth, productivity, and biochemical composition.
- Source :
-
Applied biochemistry and biotechnology [Appl Biochem Biotechnol] 2014 Mar; Vol. 172 (5), pp. 2377-89. Date of Electronic Publication: 2013 Dec 28. - Publication Year :
- 2014
-
Abstract
- One of the main parameters influencing microalgae production is light, which provides energy to support metabolism but, if present in excess, can lead to oxidative stress and growth inhibition. In this work, the influence of illumination on Scenedesmus obliquus growth was assessed by cultivating cells at different light intensities in a flat plate photobioreactor. S. obliquus showed a maximum growth rate at 150 μmol photons m(-2) s(-1). Below this value, light was limiting for growth, while with more intense illumination photosaturation effects were observed, although cells still showed the ability to duplicate. Looking at the biochemical composition, light affected the pigment contents only while carbohydrate, lipid, and protein contents remained stable. By considering that in industrial photobioreactors microalgae cells are subjected to light-dark cycles due to mixing, algae were also grown under pulsed illumination (5, 10, and 15 Hz). Interestingly, the ability to exploit pulsed light with good efficiency required a pre-acclimation to the same conditions, suggesting the presence of a biological response to these conditions.
- Subjects :
- Algal Proteins biosynthesis
Biomass
Carbohydrates biosynthesis
Light
Lipids biosynthesis
Microalgae growth & development
Microalgae metabolism
Photobioreactors
Photoperiod
Photosynthesis physiology
Scenedesmus growth & development
Scenedesmus metabolism
Microalgae radiation effects
Scenedesmus radiation effects
Subjects
Details
- Language :
- English
- ISSN :
- 1559-0291
- Volume :
- 172
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Applied biochemistry and biotechnology
- Publication Type :
- Academic Journal
- Accession number :
- 24371003
- Full Text :
- https://doi.org/10.1007/s12010-013-0679-z