Journal
BIORESOURCE TECHNOLOGY
Volume 145, Issue -, Pages 307-312Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.01.054
Keywords
Spirulina platensis; C-phycocyanin; Photobioreactor; Light intensity; CO2 fixation
Funding
- Taiwan's National Science Council [NSC 101-2221-E-006-209-MY3, NSC 101-3113-E-006-015, NSC 101-2221-E-006-094-MY3]
- Headquarters of University Advancement at the National Cheng Kung University
- Ministry of Education, Taiwan, ROC
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Spirulina platensis produces nutraceutical product C-phycocyanin (C-PC) and simultaneously mitigates CO2 emissions during its growth. Using a designed flat-type photobioreactor, the S. platensis biomass production was markedly enhanced, leading to a CO2 removal rate and a biomass concentration of 0.23 g/L/d and 2.25 g/L, respectively. The cell growth, CO2 fixation rate and C-PC production of S. platensis were investigated when it was cultivated under different irradiation conditions. As the light intensity increased from 100 to 700 mu mol/m(2)/s, the overall biomass productivity, CO2 consumption rate and maximal C-PC productivity increased significantly to 0.74, 1.53 and 0.11 g/L/d, respectively. After determining the suitable light intensity, the nitrogen concentration was also adjusted to further enhance the performance of CO2 fixation and C-PC production. The results show that with an optimal nitrogen concentration of 0.045 M, the CO2 consumption rate and maximal C-PC productivity were further increased to 1.58 and 0.13 g/L/d, respectively. (C) 2013 Elsevier Ltd. All rights reserved.
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