A new disinfection system utilizing UVC‐LED irradiation was developed. The system was affixed to the toilet seat, and it was challenged by three bacteria strains. Different configurations were tested: 3‐LEDs, 5‐LEDs (two variants), and 8‐LEDs. To determine the arrangement designs of LEDs with the optimum efficacy, two variants of 5‐LEDs configurations were additionally considered—uniform and concentrated (2‐sided) distributions. It was noticed that disinfection efficacy initially increased with the number of LEDs, but with 8‐LEDs, the trend became almost non‐obvious for surface disinfection and just marginally increased for airborne disinfection. The mean efficiencies for the surface disinfection ranged from 55.17 ± 23.89% to 72.80 ± 4.13% for E. coli; 36.65 ± 2.99% to 50.05 ± 13.38% for S. typhimurium; and 8.81 ± 3.23% to 39.43 ± 9.33% for S. epidermidis. Likewise, the mean efficiencies for airborne disinfection ranged from 42.17 ± 8.18% to 70.70 ± 4.80%; 40.40 ± 17.90% to 58.31 ± 13.87%; and 24.16 ± 3.81% to 42.79 ± 10.20% for E. coli; S. typhimurium; and S. epidermidis, respectively. Furthermore, the efficacy of the uniform irradiation was nearly twice that of the concentrated irradiation for surface disinfection and 17.70% higher for airborne disinfection, when tested against E coli. Collectively, these very promising results showcased that this compact, sustainable, and localized disinfection system has a high potential for the next generation of disinfection devices.

中文翻译：

---

一种新型 UVC-LED 系统，用于对冲厕产生的病原体进行消毒

开发了一种利用 UVC-LED 照射的新消毒系统。该系统固定在马桶座上，并受到三种细菌菌株的挑战。测试了不同的配置：3-LED、5-LED（两种变体）和 8-LED。为了确定具有最佳功效的 LED 排列设计，另外考虑了 5-LED 配置的两种变体——均匀分布和集中（2 面）分布。值得注意的是，消毒效果最初随着 LED 数量的增加而增加，但对于 8-LED，表面消毒的趋势几乎不明显，而空气传播的消毒则略有增加。大肠杆菌表面消毒的平均效率为 55.17 ± 23.89% 至 72.80 ± 4.13% ；36.65 ± 2.99% 至 50.05 ± 13.38%鼠伤寒沙门氏菌；表皮葡萄球菌为 8.81 ± 3.23% 至 39.43 ± 9.33% 。同样，空气消毒的平均效率范围为 42.17 ± 8.18% 至 70.70 ± 4.80%；40.40 ± 17.90% 至 58.31 ± 13.87%；大肠杆菌为 24.16 ± 3.81% 至 42.79 ± 10.20% ；鼠伤寒沙门氏菌；和表皮葡萄球菌，分别。此外，当对大肠杆菌进行测试时，均匀照射的效果几乎是集中照射的两倍，用于表面消毒，空气消毒效果高出 17.70% 。总的来说，这些非常有希望的结果表明，这种紧凑、可持续和本地化的消毒系统具有用于下一代消毒设备的巨大潜力。