摘要
      在本研究中，采用间歇电刺激下的厌氧-好氧耦合系统来提高含氟喹诺酮类（FQs）合成废水的生物降解性。在适当的电压和水力停留时间下，电刺激对FQ去除性能的影响更为明显。此外，厌氧阳极室和好氧阴极室的组合更有利于提高FQs的去除效率。在0.9 V下，在厌氧-阳极和好氧-阴极系统中，氧氟沙星、诺氟沙星、环丙沙星和恩诺沙星的去除效率显著提高。厌氧/需氧阳极室对FQ去除的贡献大于厌氧/需氧阴极室。电刺激选择性富集了与生物降解相关的电活性细菌（脱硫弧菌和Terrimonas）、抗生素抗性细菌（阿托菌和新衣原体）和硝化细菌（SM1A02和Reyranella）。本研究表明了间歇电刺激在生物膜反应器中处理含氟喹诺酮类废水的潜在有效性。然而，电刺激导致可移动遗传元件的增加，诱导水平基因转移和富集耐药细菌，这加速了抗生素耐药基因（ARGs）在系统中的传播，表明ARGs的传播仍然是一个挑战。
Abstract
In this study, an anaerobic–aerobic coupling system under intermittent electrical stimulation was used to improve the biodegradation of synthetic wastewater containing fluoroquinolones (FQs). The effect of electrical stimulation on FQ removal performance is more pronounced with appropriate voltage and hydraulic retention time. In addition, the combination of anaerobic-anodic and aerobic-cathodic chambers is more conducive to improving the removal efficiency of FQs. Under 0.9 V, the removal efficiencies of ofloxacin, norfloxacin, ciprofloxacin, and enrofloxacin were significantly improved in the anaerobic–anodic and aerobic–cathodic system. The contribution of the anaerobic/aerobic anodic chambers to FQ removal was greater than that of the anaerobic/aerobic cathodic chambers. Electrical stimulation selectively enriched electroactive bacteria related to biodegradation (Desulfovibrio and Terrimonas), antibiotic-resistant bacteria (Atopobium and Neochlamydia), and nitrifying bacteria (SM1A02 and Reyranella). This study indicated the potential effectiveness of intermittent electrical stimulation in treating fluoroquinolone-containing wastewater in a biofilm reactor. However, electrical stimulation led to an increase in mobile genetic elements , induced horizontal gene transfer and enriched resistant bacteria, which accelerated the spread of antibiotic-resistant genes (ARGs) in the system, indicating that the diffusion of ARGs remains a challenge.

https://www.sciencedirect.com/science/article/abs/pii/S0013935122024549