School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China.
School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China.
Bioresour Technol. 2023 Dec;390:129881. doi: 10.1016/j.biortech.2023.129881. Epub 2023 Oct 16.
The microbial electrolysis cell coupled with the biotrickling filters (MEC-BTF) was developed for enhancing the biodegradation of gaseous m-dichlorobenzene (m-DCB) through weak electrical stimulation. The maximum removal efficiency and elimination capacity in MEC-BTF were 1.48 and 1.65 times higher than those in open-circuit BTF (OC-BTF), respectively. Weak electrical stimulation had a positive impact on the characteristics of the biofilm. Additionally, microbial community analysis revealed that weak electrical stimulation increased the abundance of key functional genera (e.g., Rhodanobacter and Bacillus) and genes (e.g., catA/E and E1.3.1.32), thereby accelerating reductive dechlorination and ring-opening of m-DCB. Macrogenomic sequencing further revealed that electron transfer pathway in MEC-BTF might be mediated through extracellular electroactive mediators and cytochromes.
微生物电解池与生物滴滤塔联用（MEC-BTF）通过弱电流刺激增强了气态间二氯苯（m-DCB）的生物降解。在 MEC-BTF 中，最大去除效率和消除容量分别比开路生物滴滤塔（OC-BTF）高 1.48 和 1.65 倍。弱电流刺激对生物膜特性有积极影响。此外，微生物群落分析表明，弱电流刺激增加了关键功能属（如 Rhodanobacter 和 Bacillus）和基因（如 catA/E 和 E1.3.1.32）的丰度，从而加速了 m-DCB 的还原脱氯和开环。宏基因组测序进一步表明，MEC-BTF 中的电子传递途径可能通过细胞外电活性介质和细胞色素介导。
