Biotrickling filter (BTF) technology is inefficient in the treatment of Cl-containing volatile organic compounds (VOCs) such as chlorobenzene (CB). This study adopted non-thermal plasma (NTP) as a pretreatment and conducted in-depth analyses, especially in microorganisms, to investigate strengthening mechanism of a NTP to a BTF in the process. The introduction of NTP enhance efficiency of CB removal from 65 % to 90 %, and CO2 generation from 60 % to 85 %. It is found that the protein content of the extracellular polymeric substances increases from 212 × 10-3 mg·g−1 filler to 299 × 10-3 mg·g−1 filler, thus CB capturing and utilization enhanced. Metagenomic analysis showed that bacteria with CB-degrading properties were enriched in BTF, and CB was involved in cellular metabolism as a carbon source. The presence of active substances from NTP is found to stimulate the ability of BTF treatment. The findings of this study will provide theoretical support for the application of NTP–BTF technology.

中文翻译：

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非热等离子体增强的生物滴滤池中氯苯去除机制：从生物多样性和功能基因角度的见解


生物滴滤器 （BTF） 技术在处理含氯苯 （CB） 等含 Cl 的挥发性有机化合物 （VOC） 方面效率低下。本研究采用非热等离子体 （NTP） 作为预处理，并进行了深入分析，尤其是在微生物中，以研究 NTP 在此过程中对 BTF 的强化机制。NTP 的引入将 CB 去除效率从 65 % 提高到 90 %，将 CO2 生成效率从 60 % 提高到 85 %。研究发现，细胞外聚合物物质的蛋白质含量从 212 × 10-3 mg·g-1 填料增加到 299 × 10-3 mg·g-1 填料，从而增强了 CB 捕获和利用。宏基因组分析表明，具有 CB 降解特性的细菌富含 BTF，CB 作为碳源参与细胞代谢。发现来自 NTP 的活性物质的存在可以刺激 BTF 治疗的能力。本研究结果将为 NTP-BTF 技术的应用提供理论支持。