自由酸引导的微生物重组使得在酸性部分化过程中能够选择性丰富候选酸
Tianyi Zhang1, Min Ye2,3, Shen Cui2
1Department of Frontier Sciences for Advanced Environment, Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aoba, Aramaki-Aza, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
Environmental science & technology
|October 26, 2025
概括
自由酸 (FNA) 的积累,不仅仅是低pH值,驱动了耐酸氨氧化细菌 (AOB) 候选氧化菌在部分化 (PN) 系统中的统治地位. 这一策略通过抑制酸氧化细菌 (NOB) 在酸性条件下实现稳定的PN.
科学领域:
- 环境微生物学环境微生物学
- 污水处理 污水处理 污水处理
- 生物地质化学循环是什么
背景情况:
- 选择性丰富耐酸氨氧化细菌 (AOB),特别是Candidatus Nitrosoglobus,对于在酸性条件下稳定的部分化 (PN) 是至关重要的.
- 了解控制Ca.的生态机制和操作策略. 对于优化低pHPN系统而言,色球体的主导地位至关重要.
研究的目的:
- 调查使Ca.成为可能的生态机制和操作策略. 在低pH的PN系统中,尼特罗斯球体占主导地位.
- 为了比较自由酸 (FNA) 预处理与没有预处理对微生物群体结构和PN性能的影响.
主要方法:
- 两个并行空气升降反应堆运行:一个具有FNA预处理 (FNA-PR),一个没有 (wFNA-PR).
- 使用16S rRNA基因测序分析了微生物社区的组成.
- 通过批量测试和物流建模,评估了氧化活性.
主要成果:
- FNA-PR反应器实现了强大的酸盐积累,并抑制了酸盐氧化细菌 (NOB),促进了从Nitrosomonas转变为Ca. 尼特罗斯球体.
- 在wFNA-PR反应堆未能丰富Ca. 仅仅表示低pH值的尼特罗斯球体是不够的.
- 长期FNA积累被确定为利基选择和微生物继承向Ca.的主要驱动因素. 在酸性-FNA条件下增强AOB活性的尼罗斯球体.
结论:
- 持续的FNA积累是的有针对性的缩的一个关键因素. 低pHPN系统中的尼特罗斯球体.
- FNA预处理有效地抑制NOB并促进耐酸AOB的主导地位,为设计稳定的PN过程提供了实际指导.
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