解释完整的氨氧化细菌和正规的酸盐氧化细菌在主流废水条件下从基质亲和关系的角度共存
Runan Yang1, Shukang Cui1, Jiaying Hou1
1College of Environment and Safety Engineering, Fuzhou University, Fuzhou, 350116, China.
Environmental research
|November 19, 2025
概括
完全氧化氨 (comammox) 细菌和氧化亚酸盐 (NOB) 细菌 Nitrospira 由于对亚酸盐和氧气的亲和力不同而共存. 这种利基区分驱动着它们在生物去除系统中的稳定共存.
科学领域:
- 微生物学 微生物学
- 环境科学 环境科学
- 生物地质化学生物地质化学
背景情况:
- 完整的氨氧化 (comammox) 细菌重新塑造了对生物去除 (BNR) 的理解.
- 对于comammox Nitrospira和酸盐氧化细菌 (NOB) Nitrospira之间的共存机制还没有完全了解.
- 以前的研究探讨了comammoxNitrospira与氨氧化细菌的相互作用,但没有NOBNitrospira.
研究的目的:
- 调查允许comammoxNitrospira和NOBNitrospira的共存的动力机制.
- 在实验室条件下比较comammoxNitrospira和NOBNitrospira的基质亲和度.
- 阐明区分在这些化细菌的稳定共存中的作用.
主要方法:
- 在实验室规模的连续养反应堆中,在151天内缩comammoxNitrospira.
- 对comammoxNitrospira主导和NOBNitrospira主导污泥的比较动力分析.
- 对两种微生物群体的酸盐和氧的亲和常数的确定.
主要成果:
- 康马莫克斯Nitrospira占主导地位的污泥显示酸盐的亲和力明显低 (0.417 ± 0.015毫克-N/L) 比NOBNitrospira占主导地位的污泥 (0.650 ± 0.018毫克-N/L).
- 与comammox Nitrospira 主导的污泥 (0.019 ± 0.001 mg-O2/L) 相比,NOB 尼托斯皮拉主导的污泥表现出较低的氧 afinity (0.009 ± 0.001 mg-O2/L).
- 这些不同的亲和力表明基于基质可用性的利基分区.
结论:
- 双重亲和驱动的利基分区,其中comammoxNitrospira利用基质和NOBNitrospira利用剩余氧气,支持它们的稳定共存.
- 这种动力平衡允许尽管代谢竞争,稳定的共存.
- 这些发现提高了对化剂生态相互作用的理解,并为可持续的BNR制定了战略.
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