Fig. 2
Chemical oxygen demand (COD), ammonium (NH4+-N), total nitrogen (TN) and total phosphate (TP) removal rates. CA means sparging air, CC sparging simulated flue gas, PA means culturing C. pyrenoidosa with sparging air, and PC means culturing C. pyrenoidosa with sparging simulated flue gas. Data are presented as the mean ± standard deviation of the mean. **Indicates that there was an extremely significant difference with P < 0.01