确定WWTP尾水排放用于娱乐活动中的大肠杆菌可接受暴露限值
Wajid Ali1, Si-Yi Liu1, Yong-Tang Yan1
1School of Environmental Studies, China University of Geosciences, Wuhan, People's Republic of China.
概括
新的值限制值 (TLV) 简化了娱乐水域的微生物风险评估. 这些值通过设定废水中的大肠杆菌最大含量来确保公共卫生,保护游泳者和划船者.
科学领域:
- 环境科学 环境科学
- 公共卫生 公共卫生
- 微生物学 微生物学
背景情况:
- 废水排放在娱乐活动期间会引起病原性微生物的健康风险.
- 定量微生物风险评估 (QMRA) 是复杂的,难以转化为操作标准.
研究的目的:
- 引入废水尾水中的大肠杆菌的临界值 (TLV).
- 建立一个实际的,基于风险的水质管理和监管限制的框架.
主要方法:
- 反向QMRA用于导出四个年龄组的TLV.
- 使用美国环保署和世卫组织的风险标准进行计算.
- 对暴露变量进行了敏感性分析.
主要成果:
- 随着年龄的增长,TLVs下降,这表明成年人的限制更为严格.
- 较高的WWTP容量和接收水流与较低的TLV相关.
- 由于暴露的差异,游泳TLV明显低于划船TLV.
结论:
- TLVs提供了一个实用的工具,用于设定特定地点的微生物极限.
- 风险标准显著影响监管限制.
- 年度暴露频率是确定可接受的微生物度的一个关键因素.
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