Biofixation of carbon dioxide from coal station flue gas using Spirulina sp. LEB 18 and Scenedesmus obliquus LEB 22

摘要

The atmospheric concentration of CO2, the main greenhouse gas (GHG), has increased rapidly since the beginning of the industrial age. Anthropogenic emissions from coal-fired power plants are responsible for approximately 7% (w/w) of global CO2 emissions. Microalgae CO2biofixation is a technology that reduces GHGs based on the use of solar energy through photosynthesis to capture and use the CO2 that is produced by thermal and other sources. We determined the kinetic characteristics of the cyanophyteSpirulina sp. LEB 18 and the chlorophyteScenedesmus obliquus LEB 22 and their capacities for CO2 fixation from the flue gas of a thermoelectric plant. The kinetic growth parameters of Spirulina increased when flue gas was used as the sole carbon source. At the end of cultivation, the biomass production of Spirulina sp. LEB 18 was 35% higher in the medium with flue gas compared to the Zarrouk medium, resulting in 5.7% CO2biofixation and a 24% reduction in flue gas CO2. Thus, the biofixation of CO2 from flue gas may be useful in helping to alleviate global warming.