解读了n-DAMO和Anammox微生物的颗粒形成过程
Zhi-Cheng Zhao1, Ruo-Lin Li1, Sheng-Qiang Fan1
1State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
Environmental research
|May 23, 2024
概括
在酸盐/酸盐依赖的无氧甲氧化 (n-DAMO) 废水处理中的颗粒是由特定的微生物驱动的. n-DAMO 古代生物和 Anammox 细菌产生细胞外聚合物质 (EPS),使颗粒形成.
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:
- 亚酸盐/亚酸盐依赖的无氧甲氧化 (n-DAMO) 是一个关键的废水处理过程.
- 微生物生长速度缓慢和未解决的颗粒化机制阻碍了n-DAMO的应用.
- 颗粒形成对于高效的生物质积累和工艺性能至关重要.
研究的目的:
- 调查n-DAMO颗粒形成背后的微生物机制.
- 为了比较仅在n-DAMO系统中的粒度与将n-DAMO与Anammox合在一起的系统.
- 确定关键的微生物参与者和参与颗粒的因素.
主要方法:
- 培养n-DAMO颗粒和合的n-DAMO-Anammox颗粒.
- 使用元基因组学和元转录组学进行微生物社区分析.
- 细胞外聚合物质 (EPS) 的量化和调节分子的分析.
主要成果:
- 在与n-DAMO古菌和Anammox细菌丰富的系统中形成的密集颗粒,但在仅含n-DAMO细菌的系统中不会形成.
- 与n-DAMO细菌不同的是,n-DAMO古生物学和Anammox细菌在EPS生物合成中活跃.
- 较高的EPS产量与成功的颗粒发育相关,可能受到乙烯基同素乳和c-di-GMP的调节.
结论:
- 通过EPS生产,n-DAMO古菌和Anammox细菌在n-DAMO颗粒形成中起着至关重要的作用.
- 在n-DAMO过程中,EPS生物合成是颗粒化的关键因素.
- 结果为改善废水处理的基于颗粒的n-DAMO系统的管理提供了见解.
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