title: Engineering strategies for simultaneous enhancement of C-phycocyanin production and CO2 fixation with Spirulina platensis.
abstract: 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 μmol/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.
authors.affiliation: University Center for Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan. ccy.ncku@gmail.com
authors.forename: Chun-Yen
authors.initials: CY
authors.lastname: Chen
authors.forename: Pei-Chun
authors.initials: PC
authors.lastname: Kao
authors.forename: Chia-Jung
authors.initials: CJ
authors.lastname: Tsai
authors.forename: Duu-Jong
authors.initials: DJ
authors.lastname: Lee
authors.forename: Jo-Shu
authors.initials: JS
authors.lastname: Chang
mesh_terms: D057005:Bioengineering / Q000379:methods*; D018533:Biomass; D001709:Biotechnology / Q000379:methods; D057486:Carbon Cycle / Q000502:physiology*; D002245:Carbon Dioxide / Q000378:metabolism*; D007700:Kinetics; D008027:Light; D009584:Nitrogen / Q000032:analysis; D058433:Photobioreactors; D010798:Phycocyanin / Q000096:biosynthesis*; D013053:Spectrophotometry; D053545:Spirulina / Q000378:metabolism / Q000502:physiology*
chemical_list: D010798:Phycocyanin; D002245:Carbon Dioxide; D009584:Nitrogen
keywords: C-phycocyanin; CO(2) fixation; Light intensity; Photobioreactor; Spirulina platensis