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在全面的二次生物废水处理系统中,病毒日志减少值和主导机制

Phillip Wang¹, Tyler Hill^1,2,3, Christina Morrison¹

¹Southern Nevada Water Authority, Las Vegas, Nevada, USA.

Water environment research : a research publication of the Water Environment Federation

|September 19, 2025

概括

二级废水处理在可饮用再利用中发挥着关键作用,但病毒去除往往被忽视. 这项研究在活性污泥和湖系统中发现了不同的病毒日志减少值 (LRV),突出了需要更好的方法来证明病毒减弱.

科学领域:

环境微生物学环境微生物学
水处理技术水处理技术
公共卫生病毒学病毒学

背景情况:

二级生物废水处理对于可饮用的再利用至关重要.
这些系统中的病毒衰减通常没有获得认可.
了解病毒去除机制对于安全的水再利用至关重要.

研究的目的:

评估常规活性污泥和湖处理系统中的病毒日志减少值 (LRV).
用分子和培养方法比较病毒衰减.
评估固体分离,核酸衰变和无活化对病毒去除的贡献.

主要方法:

使用分子分析对四种人类肠道病毒和四种便指标病毒进行量化.
使用培养试验量化F特异性和体质菌体.
在内华达州南部,对两个大型水资源回收设施的评估.

主要成果:

植物病毒的LRV中位数一般较低 (<1.0),腺病毒和crAssphage的LRV中位数较高 (>1.0).
诺罗病毒GI/GII的第五百分点LRV低于0.5.
活性污泥显示出显著的核酸衰变,而可培养的菌体数据表明固体附着 (中位数LRV=2.5).
由于温度依赖的无活化,湖处理实现了高LRV的可培养大肠杆菌 (>4.0).

结论:

分子和培养方法为病毒衰弱机制提供了不同的见解.
固体的附着和物理去除在活性污泥中占主导地位,而无活化在湖中是关键.
一个全面的病毒LRV信用框架可供饮用再利用需要更好的方法对齐和机制理解.

关键词:

活性污泥活动污泥直接饮用可重复使用 (DPR)湖湖是一个湖.病原体是一种病原体.饮用饮料可重复使用.qPCRR 是一个很好的方法.

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