Biological CO2 capturing by chlorella vulgaris microalgae: effect of bubble size on growth rate

In this study, a bubble column photobioreactor is used for cultivation of micro-algae and CO2 capture. To study the effect of bubble size, two kinds of air distributor are designed and used in the bubble column photobioreactor for micro-algae growth and carbon dioxide removal. According to the results, the amount of microalgae growth in smaller bubbles was 33% greater than that of larger bubbles in a 0.1 volume ratio of CO2 to air. In addition, for larger size bubbles, the microalgae growth was 28% less than that obtained for small bubble sizes in a 0.05 volume ratio of CO2 to air.

Keywords:

photobioreactor , bubble column , co2 capturing , microalgae , chlorella vulgaris