消毒剂在不同的部分化-安纳摩克斯合脱化系统中诱导不同的代谢机制:能量转化和微生物应激反应
Yi Guo1, Jingfeng Gao1, Hanyi Wang1
1National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Department of Environmental Engineering, Beijing University of Technology, Beijing 100124, China.
Journal of hazardous materials
|October 7, 2025
概括
硫自脱系统 (PNA/SAD) 在消毒剂压力下优于异脱 (PNA/HD),保持更高的去除效率和增强的微生物稳定性,用于先进的废水处理.
科学领域:
- 环境微生物学 环境微生物学
- 废水处理工程 废水处理工程
- 生物化学工程 生物化学工程
背景情况:
- 优化部分化 (PNA) 系统中的去除对于先进的废水处理至关重要.
- 在消毒剂压力下了解系统性能对于过程弹性至关重要.
研究的目的:
- 在消毒剂压力下比较PNA/异型脱 (PNA/HD) 和PNA/硫自型脱 (PNA/SAD) 系统的性能和抗应力机制.
- 阐明影响这些系统中去除效率和微生物稳定性的分歧机制.
主要方法:
- 在不同消毒剂度下对PNA/HD和PNA/SAD系统进行比较分析.
- 评估去除效率,细胞外聚合物物质 (EPS) 生产和基因表达 (氨氧化,硫氧化,抗性基因).
- 评估微生物群落的功能,包括能源供应途径和定数感应调节.
主要成果:
- 在高消毒剂水平下,PNA/SAD实现了明显更高的无机总去除 (93.97%) 与PNA/HD (75.46%) 相比.
- PNA/SAD表现出增强的EPS产量,更高的氨氧化基因丰度和稳定的硫氧化,确保了连续的能源供应.
- PNA/SAD通过通过定数感应对生物膜稳定性,耐药性基因和毒性因子的协同调节,表现出优越的抗压能力.
结论:
- 与 PNA/HD 相比,PNA/SAD 在消毒剂压力较大的环境中提供更高的去除效率和长期稳定性.
- 增强的EPS生产,强大的微生物能量供应,以及定数感应介导的抵抗机制,有助于PNA/SAD的弹性.
- 这些发现为优化PNA系统提供了理论基础,以便在具有挑战性的废水处理条件下提高性能和稳定性.
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