Dynamics of CO2 fixation efficiency by Bracteacoccus minor strain with different nitrogen availability

The excessive release and accumulation of carbon dioxide in the atmosphere is a major global issue with several negative environmental consequences, including global warming. Various approaches are used to eliminate these negative effects, with the main focus being on reducing carbon dioxide emissions and achieving a zero-carbon balance. In addition to decline fossil fuel mining and use, biosequestration is being considered as a potential solution. Microalgae are particularly promising in this regard, as they can serve as sinks for carbon dioxide when used in biotechnological processes. Some strains of microalgae from the genus Bracteacoccus Thereg, have been studied for their ability to synthesize valuable products. However, the ability to absorb carbon dioxide by these objects has not been studied, in particular, when the concentration of available nitrogen in the nutrient medium changes. The study found that high levels of bioavailable nitrogen increase the average rate of absorption of carbon dioxide, while maximum absorption occurs when the culture leaves the lag-phase. The rate of carbon dioxide fixation and its amount absorbed by Bracteacoccus minor (MZ-Ch31) directly depend on biomass productivity and chlorophyll concentration.