效率高的废水消毒使用一种新的微波排放无电极紫外线系统,在超低剂量的臭氧中使用超低剂量的臭氧
Jue-Lin Xiang1, Jun-Jie Wang1, Zhi-Jing Wu1
1College of Architecture and Environment, Sichuan University, Chengdu 610000, China.
Journal of hazardous materials
|November 21, 2023
概括
使用微波放电无电极灯UV (MWUV) 和臭氧 (O3) 的协同消毒提供了优越的细菌失活. 这种综合方法显著降低了光反激活和黑暗复活,提高了消毒效率.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 摄影化学的使用.
背景情况:
- 微波放电无电极灯 (MDEL) 是一种新的紫外线光源.
- 传统的消毒方法面临着微生物耐药性和光激活的挑战.
研究的目的:
- 研究MDEL (MWUV) 的紫外线与超低剂量的臭氧 (O3) 结合的协同消毒功效.
- 评估MWUV/O3处理对细菌无活化,光重活化和黑暗复活的影响.
- 阐明MWUV/O3消毒的基础机制.
主要方法:
- 使用MWUV和不同O3度的协同消毒实验.
- 对大肠杆菌和细菌细菌的微生物无活化试验.
- 光反激活和黑暗复活测试.
- 电子偏磁共振 (EPR) 光谱仪用于激素检测.
- 扫描电子显微镜 (SEM) 和激光共聚焦扫描显微镜 (LCSM) 用于细胞结构分析.
主要成果:
- 与单独使用MWUV或O3相比,MWUV/O3治疗显示大肠杆菌和B. subtilis的无活化率明显更高.
- 在0.4mg/L的O3度中,MWUV实现了5.52log的大肠杆菌失活.
- 与单独使用MWUV相比,MWUV/O3治疗显著降低了大肠杆菌光激活 (最大2.90%) 和黑暗复活 (最大0.0036%).
- 在MWUV/O3处理过程中,EPR光谱证实了基生成的增加.
- 显微镜揭示了O3在破坏细菌细胞结构中的关键作用.
- 在真正的家用废水中实现了便大肠杆菌的有效消毒.
结论:
- MWUV和O3的组合提供了一个高度有效的协同消毒策略.
- 超低剂量O3通过增加基因产生和破坏细胞结构,显著增强MWUV消毒.
- 这种方法可以更好地控制微生物的再生,使其成为水和废水处理的有希望的技术.
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