Utilization of the cyanobacteria Anabaena sp. CH1 in biological carbon dioxide mitigation processes

Before switching totally to alternative fuel stage, CO2 mitigation process has considered a transitional strategy for combustion of fossil fuels inevitably. In comparison to other CO2 mitigation options, such as oceanic or geologic injection, the biological photosynthetic process would present a far superior and sustainable solution under both environmental and social considerations. The utilization of the cyanobacteria Anabaena sp. CH1 in carbon dioxide mitigation processes is analyzed in our research. It was found that an original developed photobioreactor with internal light source exhibits high light utilization. Anabaena sp. CH1 demonstrates excellent CO2 tolerance even at 15% CO2 level. This enables flue gas from power plant to be directly introduced to Anabaena sp. CH1 culture. Double light intensity and increased 47% CO2 bubble retention time could enhance CO2 removal efficiencies by 79% and 67%, respectively. A maximum CO2 fixation rate of 1.01 g CO2 L−1 day−1 was measured experimentally.