Constructed wetlands (CWs) are widely utilized for domestic wastewater treatment, yet there is a relative scarcity of research focused on the treatment of real domestic wastewater. This study evaluated the enhanced treatment performance and nitrous oxide (NO) emissions in CWs by integrating biochar with intermittent aeration, the removal of antibiotic resistance genes (ARGs) was also assessed. The results indicated that the biochar-aeration CW significantly improved denitrification, achieving a total nitrogen removal efficiency of 42.83 %. Notably, biochar-aeration CW exhibited the lowest NO emission fluxes (31.28–726.49 μg m h). Furthermore, the introduction of biochar fostered the development of tightly bound extracellular polymeric substances, primarily attributed to biofilm production. The biochar-aeration CW effectively reduced the four targeted ARGs () by 0.41–1.43 log. These findings would be beneficial for understanding the function of biochar-intermittent aeration technology in enhancing the treatment capacity of CWs for domestic wastewater treatment.

中文翻译：

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生物炭化垂直流人工湿地处理真实生活废水的处理性能增强和抗生素抗性基因减少


人工湿地（CW）广泛用于生活污水处理，但针对实际生活污水处理的研究相对较少。本研究评估了生物炭与间歇曝气相结合所增强的处理性能和一氧化二氮 (NO) 排放量，还评估了抗生素抗性基因 (ARG) 的去除情况。结果表明，生物炭曝气CW显着提高了反硝化效果，总氮去除效率达到42.83%。值得注意的是，生物炭曝气 CW 表现出最低的 NO 排放通量（31.28–726.49μgm·h）。此外，生物炭的引入促进了紧密结合的细胞外聚合物的发展，这主要归因于生物膜的产生。生物表征 CW 有效地将四种靶向 ARG () 降低了 0.41–1.43log。这些发现将有助于了解生物炭间歇曝气技术在提高污水处理厂处理生活污水能力方面的作用。