在anammox-脱对系统中,Cu(II) 对去除的抑制作用
Ming Zeng1, Xiangjing Yang1, Yujie Qin2
1School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
The Science of the total environment
|June 5, 2024
概括
废水中的铜 (Cu (II)) 显著抑制了亚纳摩克斯脱,降低了去除的效率. 即使是较低的铜含量也会影响微生物活动,影响污泥,导致关键细菌的代谢障碍.
科学领域:
- 环境微生物学环境微生物学
- 废水处理技术 废水处理技术
- 生物地质化学循环是什么
背景情况:
- 铜 (Cu ((II)) 是一种常见的工业污染物,存在于富含的废水中.
- 亚纳摩克斯脱过程对于废水处理中的去除至关重要.
- 了解铜对这种合系统的影响对于有效的治疗策略至关重要.
研究的目的:
- 调查Cu (II) 暴露对anammox-脱结合系统的短期和长期影响.
- 为了确定Cu (II) 的抑制度及其对去除效率的影响.
- 阐明铜毒性和微生物在系统中的适应机制.
主要方法:
- 进行不同度的短期和长期实验.
- 测量总去除效率和微生物活动.
- 分析污泥中的铜积累和微生物社区结构 (蛋白质细菌,Candidatus Brocadia).
- 使用PICRUSt2分析代谢途径的变化.
主要成果:
- 的半抑制度 (IC50) 确定为35.54 mg/L.
- 在10 mg/L Cu (II) 时,去除效率从93%降至33%.
- 污泥中大量的铜积累 (14.54 mg/g SS) 抑制了微生物活动,触发了细胞外聚合物质 (EPS) 的产生.
- 蛋白质细菌表现出高耐受性,而Candidatus Brocadia在更高的铜度下受到抑制.
- PICRUSt2揭示了抑制的代谢活动和诱导的防御反应,导致微生物死亡.
结论:
- (II) 显著损害了anammox脱效率,显著影响超过5mg/L.
- 微生物群落通过积累铜和产生EPS来适应,但在较高度时会发生严重的代谢干扰.
- 这项研究提供了关于铜在anammox脱系统中的抑制机制的见解,这对于废水处理优化至关重要.
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