Enhanced biomass and phycocyanin production of Arthrospira (Spirulina) platensis by a cultivation management strategy: Light intensity and cell concentration
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Author list: Chaiklahan R., Chirasuwan N., Srinorasing T., Attasat S., Nopharatana A., Bunnag B.
Publisher: Elsevier
Publication year: 2022
Journal: Bioresource Technology (0960-8524)
Volume number: 343
Start page: 126077
ISSN: 0960-8524
Languages: English-Great Britain (EN-GB)
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Abstract
This work investigated the cultivation of Arthrospira (Spirulina) platensis BP in a photobioreactor under light intensities of 635, 980, 1300, and 2300 µmol m−2 s−1, using a semi-continuous mode to keep cell concentration at optical densities (OD) of 0.4, 0.6, and 0.8. The highest productivity of biomass (0.62 g L–1 d–1) and phycocyanin (123 mg L–1 d–1) were obtained when cells were grown under a light intensity of 2300 µmol m−2 s−1 at OD 0.6. At this concentration, the efficiency of energy consumption to the biomass of algae was around 2.26–2.31 g (kW h)–1 d–1, while, a maximum photosynthetic efficiency of 8.02% was obtained under a light intensity of 635 µmol m−2 s−1 at OD 0.8. This indicates how light intensity, cell concentration, and light–dark conditions can enhance biomass and phycocyanin production, if well manipulated. © 2021 Elsevier Ltd
Keywords
Arthrospira (Spirulina), Energy efficiency, Light intensity, Photobioreactor, Phycocyanin
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