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工人暴露于污泥排水设施中的生物气溶:风险和减轻风险

Bei-Bei Cui¹, Wajid Ali², Wei-di Wan²

¹School of Environmental Studies, China University of Geosciences, Wuhan 430074, PR China; Xiaogan Forest Resources Monitoring Center, Xiaogan 432000, PR China.

|March 13, 2026

概括

废水处理厂的泥排水会释放出生物气溶. 这项研究估计了工人安全的暴露极限,发现口罩通过减少吸入的可呼吸颗粒来显著提高安全极限.

科学领域:

环境微生物学环境微生物学
职业健康和安全职业健康和安全

背景情况:

废水处理厂 (WWTP) 的泥排水是工人暴露于生物气溶的主要来源.
定量微生物风险评估 (QMRA) 在提供现场风险数据方面存在局限性.
建立关键度标准为评估生物气溶风险提供了一种实际方法.

研究的目的:

调查来自污泥脱水的埃舍里希亚大肠杆菌生物气溶排放.
为了估计可接受风险水平的上限类型的曝光限值 (EL).
分析工作姿势,通风和季节对生物气溶暴露的影响.

主要方法:

使用蒙特卡洛模拟和反向QMRA来估计暴露限值.
进行敏感性分析以确定关键的风险参数.
在不同的环境和操作条件下测量生物气溶度.

主要成果:

与自然通风相比,通风不良会使生物气溶的度增加1.6-1.7倍.
呼吸分数 (<4.7微米) 占排放量的78%-100%.
戴口罩的使用将衍生暴露限值增加了一到两倍.

结论:

面具显著减少了吸入的生物气溶,大大提高了职业暴露限值.
通风,工作姿势和季节影响生物气溶暴露和衍生ELs.
这项研究为在排水设施中建立职业暴露限值提供了关键数据.

关键词:

可接受的暴露度是可接受的暴露度.生物气溶暴露的时间反向定量微生物风险评估废水处理厂废水处理厂

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