Research Express@NCKU - Articles Digest
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Research Express@NCKU Volume 25 Issue 5 - December 6, 2013 [ http://research.ncku.edu.tw/re/articles/e/20131206/4.html ]
Engineering strategies for simultaneous enhancement of C-phycocyanin production and CO2 fixation with
Spirulina platensis
Chun-Yen Chena,*, Pei-Chun Kaob, Chia-Jung Tsaib, Duu-Jong Leec, Jo-Shu Changa,b,d
a University Center for Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
b Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan c Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
d Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan, Taiwan
Bioresource Technology, Volume 145, October 2013, Pages 307–312
In this study, a flat-type photobioreactor (PBR) was designed to increase the light penetration efficiency and to avoid the shielding effects. Using the flat-type PBR, the Spirulina platensis biomass production was markedly enhanced, leading to a CO2 removal rate and a microalgae biomass concentration of 0.23 g/L/d and 2.25 g/L, respectively. The cell growth, CO2 fixation rate and C-phycocyanin (C-PC) production of Spirulina platensis were investigated when it was cultivated under different irradiation conditions. As the light intensity increased from 100 to 700 µmol/m2/s, the overall biomass productivity, CO2
consumption rate and maximal C-PC productivity was obviously increased to 0.74, 1.53 and 0.11 g/L/d, respectively. After determining the suitable light intensity, the nitrogen concentration were also adjusted to further enhance the performance of CO2 fixation and C-PC production. The results show that with a optimal nitrogen concentration of 0.045 M, the CO2 consumption rate and maximal C-PC productivity were further increased to 1.58 g/L/d and 0.13 g/L/d, respectively.
