原生动物群落及其对E.E.的捕食的贡献 在有氧粒状泥中的大肠杆菌
Zhaolu Feng1, Yi Yang1, Norbert C A de Ruijter2
1Environmental Technology, Wageningen University and Research, P.O. Box 17, 6700 AA Wageningen, The Netherlands.
Environmental science & technology
|October 27, 2025
概括
污水处理中的原生虫,特别是像Epistylis这样的状动物,可以显著地去除细菌. 较大的有氧颗粒污泥 (AGS) 分数增强了这种捕食,改善了水的净化.
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.
背景情况:
- 原生动物通过掠食在废水净化中发挥作用.
- 有氧颗粒污泥 (AGS) 系统使用不同大小的微生物聚合物.
- 原生动物在去除AGS中与人类相关的细菌中的作用尚不清楚.
研究的目的:
- 在不同的AGS大小分数中调查原生动物群落及其捕食行为.
- 确定原生动物掠食对 AGS.中的与人类相关的细菌 (大肠杆菌) 清除的贡献.
主要方法:
- 使用光大肠杆菌作为模型细菌的吸收实验.
- 在六个AGS大小分数和活性污泥中微观观察原生动物群落.
- 在有氧和无氧条件下进行微观宇宙实验,以区分掠食效应.
主要成果:
- 状状动物Epistylis和Vorticella主导着原生动物种群,Epistylis在较大的AGS分数 (>1毫米) 中普遍存在,而Vorticella在较小的AGS分数 (<1毫米) 中普遍存在.
- 原生动物掠食被确定为大肠杆菌去除的关键途径,实现了额外的0.5至2.5 log10 CFU mL-1 减少.
- 较大的AGS分数显示出更高的捕食能力,与增加的Epistylis丰度相关.
结论:
- 原生动物群落,特别是较大的AGS中的Epistylis,对废水处理中的细菌去除有显著的贡献.
- 了解原生动物的分布和捕食对于优化AGS在病原体清除方面的性能至关重要.
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