| 内容提要: |
Absorption-bioconversion hybrid process has the advantages of combined CO2 capture and utilization with avoiding energy consumption of rich ammonium salt solution regeneration. However, NH3 escape would adversely affect microalgae growth. Previous work indicated that batch feeding cultivation might be a promising alternative to reduce NH3 escape and inhibition to microalgae. In this work, batch feeding interval (i.e., 3, 6 and 9-days) and pH control (i.e., 7, 8 and unadjusted) on the performance of absorption-microalgae hybrid system would be investigated. The experimental results indicated that pH control has a significant influence on the growth of microalgae (Chlorella sp. L38) and value-added ingredient yield. NH3 escape ratio could be kept at lower than 34 % when pH was controlled at 7. In addition, shorten batch feeding interval would be also beneficial to increase the growth of microalgae with NH3 escape ratio decreased to 19 %. It could be observed that the performance of absorption-microalgae hybrid system could be intensified by the pH control and batch feeding interval optimization. |