Impact of salinity on the kinetics of CO2 fixation by Spirulina Platensis cultivated in semicontinuous photobioreactors
- Authors
- Ram?rez P?rez, Javier Christian
- Format
- Article
- Status
- publishedVersion
- Description
An alternative biological technology for mitigating atmospheric carbon dioxide emitted from stationary sources is the use of microalgae incorporated into photobioreactors. Microalgae use this gas as carbon source and convert it into biomass. The microalgae Spirulina Platensis was cultivated under low sodium chloride concentration, 1 g L-1 and adapted to high sodium chloride concentration, 100 g L-1. Both strains were cultivated at laboratory scale in a semi-continuous photobioreactors for CO2 biofixation and biomass production. Experiments were carried out within the range of CO2 concentrations 0.5 to 10%, temperatures 10 to 40oC, light intensities 60 to 200 ?mol s-1 m-2. Spirulina Platensis presented better results for all kinetic parameters than Spirulina Platensis adapted to salinity stress. The highest rate of biofixation for Spirulina Platensis was 25.1 g CO2/m3 h, and the maximum specific growth (?max) achieved 0.44 - 0.67 d-1 at 2.5% CO2, 100 ?mol s-1 m-2 and 25 oC. Corresponding determined values of Spirulina Platensis adapted, 13.9.2 g CO2/m3 h,0.31 d-1- 0.58 d-1 at 2.5% C O2, 80 ?mol s-1 m-2 and 28oC. However, both microalgae exhibited experimental limiting growth factors of CO2 10%, 40oC, and 200 ?mol s-1m2, conditions under which, photoinhibition of photosynthesis occurred and photosynthetic CO2 biofixation inhibition may be enhanced by salinity stress. The efficiency of CO2 removal by Spirulina Platensis achieved (99%), whereas for Spirulina Platensis adapted (96%) both at 2.5% CO2 concentration was achieved, respectively. The kinetic parameters estimated for Spirulina Platensis can be used to improve photobioreactor design for reducing of atmospheric carbon dioxide.
https://www.researchgate.net/publication/275275279_Impact_of_salinity_on_the_kinetics_of_CO2_fixation_by_Spirulina_Platensis_cultivated_in_semicontinuous_photobioreactors
https://www.researchgate.net/publication/275275279_Impact_of_salinity_on_the_kinetics_of_CO2_fixation_by_Spirulina_Platensis_cultivated_in_semicontinuous_photobioreactors
- Publication Year
- 2015
- Language
- eng
- Topic
- CARBON DIOXIDE BIOFIXATION
SPECIFIC GROWTH RATE
SPIRULINA PLATENSIS
- Repository
- Repositorio SENESCYT
- Rights
- openAccess
- License
- closedAccess