In this study, a modified gas feeding bubble column photo-bioreactor was utilized for microalgae cultivation and CO₂ capturing. By applying response surface methodology, the optimum values of temperature, pH, light intensity, aeration rate, light-dark cycle and time were determined as 25 $°$ C, 8, 2700 lx, 0.5 LPM and 16−8 h, respectively. Two air spargers (with different aperture size) were used to study the effect of the bubble size on the CO₂ removal and microalgae growth rate. Besides, the inlet air was humidified to avoid the evaporation from the photo-bioreactor. For the smaller bubbles and 7% CO₂ concentration, the maximum values for the CO₂ fixation rate, productivity and concentration of microalgae were determined to be 633.73 mg L⁻¹d⁻¹, 337 mg L⁻¹d⁻¹ and 4244 mg L⁻¹, respectively. CO₂ utilization efficiency was 35% for the smaller bubbles, showing a 15% increase over that for the larger bubbles.

在这项研究中，改进的气体进料鼓泡塔光生物反应器用于微藻培养和CO ₂捕获。通过应用响应面方法，确定温度，pH，光强度，曝气速率，明暗循环和时间的最佳值为25$°$分别为C，8、2700 lx，0.5 LPM和16-8 h。使用两个空气喷射器（具有不同的孔径大小）来研究气泡大小对CO ₂去除和微藻生长速率的影响。此外，入口空气被加湿以避免从光生物反应器中蒸发。对于较小的气泡和7％CO ₂浓度，对于CO的最大值₂测定固定率，生产率和微藻的浓度是633.73毫克的L ^-1 d ^-1，337毫克的L ^-1 d ^-1和4244毫克分别为L ^-1。一氧化碳₂ 较小气泡的利用率为35％，比较大气泡的利用率提高了15％。