Cost-efficient cultivation of Spirulina platensis by chemical absorption of CO2 into medium containing NaOH

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Spirulina is one of the promising photosynthetic microorganisms as the source for food, cosmetic, and other value-added products such as phycocyanin. However, its production cost associated with cultivation is expensive because of high concentration of bicarbonate (76wt%) in standard Zarrouk medium for Spirulina. Bicarbonate not only acts as a carbon source but also helps maintaining culture medium in alkaline condition, which is essential for growth of Spirulina. The present study demonstrates that bicarbonate (16.8 g/L) in standard Zarrouk medium was completely replaceable by chemical CO2 absorption using 0.2M NaOH and 154.2 mmol CO2 gas could be absorbed in the form of NaHCO3/Na2CO3 into 1 L medium during the process. This process was incorporated into Spirulina cultivation, which enabled us to reduce the total cost of preparation of Zarrouk medium by 34.3% without sacrificing biomass and pigments production. In addition, another important use of NaOH is achievement of cost-efficient and ecofriendly sanitization of culture medium.
Publisher
KOREAN INSTITUTE CHEMICAL ENGINEERS
Issue Date
2015-11
Language
English
Article Type
Article
Keywords

CARBON-DIOXIDE CAPTURE; SEQUESTRATION

Citation

KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.32, no.11, pp.2285 - 2289

ISSN
0256-1115
DOI
10.1007/s11814-015-0073-3
URI
http://hdl.handle.net/10203/207494
Appears in Collection
CBE-Journal Papers(저널논문)
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