揭示Fe降解诱导的无氧氨氧化和Fe降解/氧化细菌之间的协同作用,用于高效的去除
Xiaojing Hao1, Wei Zeng1, Qingteng Gong1
1National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Department of Environmental Engineering, Beijing University of Technology, Beijing 100124, China.
Bioresource technology
|September 18, 2025
概括
这项研究介绍了废水处理的创新铁系统,实现了97%的总去除. 该系统通过整合铁循环来增强无氧氨氧化 (Anammox),提高效率和稳定性.
科学领域:
- 环境微生物学 环境微生物学
- 环境化学环境化学
- 废水处理技术 废水处理技术
背景情况:
- 无氧氨氧化 (Anammox) 是废水处理的能源效率,但面临的挑战是酸盐供应和酸盐积累.
- 酸盐的积累和不稳定的酸盐的可用性限制了传统Anammox工艺的效率和稳定性.
- 开发强大而高效的去除策略对于可持续的废水管理至关重要.
研究的目的:
- 开发和评估一种创新的铁- (Fe-N) 合系统,以提高废水中的去除.
- 在有限的酸盐供应条件下,研究Anammox和铁循环之间的协同作用.
- 阐明Fe-N合系统中涉及的微生物机制和代谢途径.
主要方法:
- 实施了一种创新的铁 (Fe-N) 合系统,可控制Fe2O3的添加.
- 使用同位素追踪来量化Anammox和Feammox对去除的贡献.
- 采用分子分析,包括转录基因分析,以确定微生物群落及其功能.
主要成果:
- 该Fe-N合系统实现了97%的总去除,低NO2--N/NH4+--N摩尔比率 (0.75) 和3.69mM Fe2O3.3.
- 在NH4+-N氧化过程中,anammox占67%,而Feammox在限制酸盐的条件下补充了该过程.
- 通过Feammox产生的Fe (II) 促进了酸盐的减少,维持了系统内的铁和基质循环.
- 转录组分析证实了Feammox在关键属 (Candidatus Brocadia,Candidatus Kuenenia) 的活性,表明了微生物协同作用.
结论:
- 开发的铁联系统显著提高了废水处理中的去除效率和稳定性.
- 通过铁循环介导的Anammox和Feammox的协同微生物网络有效地解决了酸盐的限制和酸盐的积累.
- 这种方法通过利用微生物协作,为先进的废水处理提供了可持续和高效的战略.
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