Carbon dioxide bio-fixation by algae of high rate pond on natural water medium

Algae are one of the major concerns on the bio-fixation of greenhouse gas CO2 and high rate pond (HRP) is the most efficient algal biomass production facility. This study tried to evaluate the potential of CO2 mitigation by algae in the HRP with natural water medium which fits the ecological engineering concept. The results showed that the uptake rate could reach 162 mg/L/day and the consumption efficiency was kept up to 123%. Furthermore, through all our study the consumption efficiency remained almost constant. In addition, after the comparisons between our study and literature, we demonstrated (1) the mixed culture performed better than pure culture, (2) the natural medium absorbed CO2 more than artificial medium and (3) consumption efficiency was more sensitive than uptake rate. Finally, the algal HRP showed the potential of CO2 sequestration and algae might be an important alternative to reduce the greenhouse gas of atmospheric CO2.