Chemical Engineering Laboratory, Faculty of Sciences, University of La Coruña, Rúa da Fraga, 10, 15008-La Coruña, Spain.
J Biotechnol. 2012 Feb 20;157(4):554-63. doi: 10.1016/j.jbiotec.2011.07.019. Epub 2011 Jul 22.
Recently, research on the use of binary aqueous-organic liquid phase systems for the treatment of polluted air has significantly increased. This paper reports the removal of α-pinene from a waste air stream in a continuous stirred tank bioreactor (CSTB), using either a single-liquid aqueous phase or a mixed aqueous-organic liquid phase. The influence of gas flow rate, load and pollutant concentration was evaluated as well as the effect of the organic to aqueous phase ratio. Continuous experiments were carried out at different inlet α-pinene concentrations, ranging between 0.03 and 25.1 g m⁻³ and at four different flow rates, corresponding to residence times (RTs) of 120 s, 60 s, 36 s and 26 s. The maximum elimination capacities (ECs) reached in the CSTB were 382 g m⁻³ h⁻¹ (without silicone oil) and 608 g m⁻³ h⁻¹ (with 5%v/v silicone oil), corresponding to a 1.6-fold improvement using an aqueous-organic liquid phase. During shock-loads experiments, the performance and stability of the CSTB were enhanced with 5% silicone oil, quickly recovering almost 100% removal efficiency (RE), when pre-shock conditions were restored. The addition of silicone oil acted as a buffer for high α-pinene loads, showing a more stable behaviour in the case of two-liquid-phase systems.
最近，使用双水相有机液相体系处理污染空气的研究显著增加。本文报告了在连续搅拌槽生物反应器（CSTB）中，使用单相水相或混合水-有机液相去除废气流中的α-蒎烯。评估了气流速率、负荷和污染物浓度的影响，以及有机相与水相比例的影响。在不同的入口α-蒎烯浓度下进行了连续实验，范围在 0.03 至 25.1 g m⁻³之间，在四个不同的流速下进行了实验，对应的停留时间（RT）分别为 120 s、60 s、36 s 和 26 s。在 CSTB 中达到的最大去除容量（EC）分别为 382 g m⁻³ h⁻¹（无硅油）和 608 g m⁻³ h⁻¹（5%v/v 硅油），使用水-有机液相可提高 1.6 倍。在冲击负荷实验中，CSTB 的性能和稳定性得到了 5%硅油的增强，当恢复预冲击条件时，迅速恢复了近 100%的去除效率（RE）。硅油的添加起到了高α-蒎烯负荷的缓冲作用，在两相体系中表现出更稳定的行为。
