Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China.
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China; Technology Innovation and Training Center, Polytechnic Institute, Zhejiang University, Hangzhou, 310015, China.
J Environ Manage. 2020 May 1;261:109665. doi: 10.1016/j.jenvman.2019.109665. Epub 2020 Mar 2.
Biotechnology has proven effective in removing a wide variety of VOCs. In this study, the effects of pH (from 3 to 7), operating temperature (20-30 °C), empty bed residence time (EBRT, 10-40 s) and transient inlet concentration (400-4000 mg m) on the removal performance of an airlift packing bioreactor (ALPR) was investigated. The removal efficiency (RE) and stability of the ALPR was evaluated and compared with the conventional airlift bioreactor (ALR). The results showed that under the influence of single factor variation, the ALPR showed significant higher RE and better stability than the ALR in removing dichloromethane (DCM) and toluene. Besides, a factorial design was used to analyses the interaction of multiple factors and their influence on the removal of DCM and toluene in the ALPR and ALR. It shows that pH value has the most significant influence, and plays a crucial role in maintaining high RE of DCM and toluene in both of the ALPR and ALR. Temperature has a great effect on the removal of toluene. EBRT has certain effect on the removal of DCM in the ALPR. The transient concentration of a single substrate has a significant negative effect on the RE of this substrate, while it does not significantly affect the removal of another substrate in the ALPR. However, the steep increase of DCM concentration has an adverse effect on the RE of high concentration toluene in the ALR. The overall RE and degradation capacity of both toluene and DCM by the ALPR are much higher than that of the conventional ALR.
生物技术已被证明在去除多种 VOCs 方面非常有效。在这项研究中，考察了 pH 值（3-7）、操作温度（20-30°C）、空床停留时间（EBRT，10-40 s）和瞬态入口浓度（400-4000 mg m）对气升式填充生物反应器（ALPR）去除性能的影响。评估并比较了 ALPR 的去除效率（RE）和稳定性与传统气升式生物反应器（ALR）。结果表明，在单因素变化的影响下，ALPR 在去除二氯甲烷（DCM）和甲苯方面表现出比 ALR 更高的 RE 和更好的稳定性。此外，还使用析因设计分析了多个因素的相互作用及其对 DCM 和甲苯在 ALPR 和 ALR 中去除的影响。结果表明，pH 值的影响最大，对维持 DCM 和甲苯在 ALPR 和 ALR 中的高 RE 起着关键作用。温度对甲苯的去除有很大影响。EBRT 对 DCM 在 ALPR 中的去除有一定影响。单一底物的瞬态浓度对该底物的 RE 有显著的负面影响，而对 ALPR 中另一种底物的去除没有显著影响。然而，DCM 浓度的急剧增加对 ALR 中高浓度甲苯的 RE 有不利影响。与传统的 ALR 相比，ALPR 对甲苯和 DCM 的整体 RE 和降解能力都要高得多。
