在低臭氧暴露的水再利用应用中病毒无活化
Samantha Hogard1, Robert Pearce2, Kathleen Yetka3
1Trussell Technologies, 4350 Executive Dr, San Diego, CA 92121, USA.
Water research
|April 17, 2024
概括
使用UV254吸收率和臭氧与TOC比率的新框架有效监测臭氧消毒,证明对水质变化具有弹性,并提高水的再利用安全性.
科学领域:
- 环境科学 环境科学
- 水处理技术水处理技术
- 微生物学 微生物学
背景情况:
- 传统的臭氧消毒依赖于暴露 (Ct) 值,这些值对水质和测量方法敏感.
- 显著的病毒失活可以发生在最小的可测量的臭氧暴露,挑战基于CT的框架.
- 温度,pH,TOC和TSS等水质变量会影响臭氧的衰变和消毒的有效性.
研究的目的:
- 评估超越传统Ct的替代臭氧监测框架.
- 评估水质参数对臭氧衰变动力学和病原体灭活的影响.
- 调查酸盐的影响,并探索替代臭氧应用方法,用于水的再利用.
主要方法:
- 评估UV254吸收率和O3:TOC比率的变化,作为消毒的指标.
- 在不同的温度 (12-30°C) 和pH值 (5.5-8.4) 中评估了臭氧的衰变和无活化.
- 使用可变源水 (TOC 5-11 mg/L,TSS 1.2-5.8 mg/L) 和酸盐挑战的测试消毒性能.
- 研究了多点臭氧溶解作为替代应用方法.
主要成果:
- 紫外线254吸收率和O3:TOC比率的变化与病毒无活化有很强的相关性,并且对水质波动有很强的抵抗力.
- 温度和pH值的增加加速了臭氧的衰变,但由于病毒失活率更快,对整体消毒的影响很小.
- UV254吸收率和施加的臭氧剂量是可变TOC水的关键指标;酸盐显著降低了消毒性能.
- 多点臭氧溶解显示出潜在的好处,特别是在酸盐的存在下.
结论:
- 替代框架 (UV254,O3:TOC) 提供强大的臭氧消毒监测,可适应变化的水质.
- 了解水质影响对于优化臭氧剂量和消毒性能至关重要.
- 开发先进的监测和应用方法对于安全和高效的水再利用至关重要,最大限度地减少有害副产品的形成.
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