亚纳莫克斯和分散性酸盐降解细菌之间的协同作用维持了反应器在可变负载比率的性能
Christian White1, Edmund Antell1, Sarah L Schwartz1
1Department of Civil & Environmental Engineering, University of California, Berkeley, Berkeley, CA, United States.
Frontiers in microbiology
|August 28, 2023
概括
在废水处理中改变与酸盐的比率会影响微生物群落. 亚纳莫克斯和异样化酸盐降解 (DNRA) 细菌之间的相互关系支持去除效率.
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
- 生物反应器微生物生态学
背景情况:
- 无氧氨氧化 (anammox) 细菌对于废水侧流中的去除至关重要.
- 亚纳莫克斯细菌与异质型细菌相互作用,影响去除效率.
- 影响和化物 (NH4+:NO2-) 的比例显著影响anammox工艺性能.
研究的目的:
- 研究可变NH4+:NO2-比对anammox生物反应器微生物生态学的影响.
- 了解在不同的基质条件下anammox细菌和其他微生物群落之间的关系.
- 评估微生物群落的转移与去除效率的相关性.
主要方法:
- 使用实验室规模的anammox膜生物反应器 (MBR).
- 在实验期间操纵了入的NH4+:NO2-比率.
- 采用16S rRNA基因和中枪元基因组测序来进行微生物社区分析.
主要成果:
- 氨去除效率随NH4+:NO2-比率而变化,在较低的比率下降,但随着调整而恢复.
- 尽管氨去除的波动,但去除效率仍然相对稳定.
- 浮游生物 (anammox 细菌) 的相对丰度下降,而具有 DNRA 基因 (nrfAH) 的细菌在较低的比例上增加.
结论:
- 较高的DNRA细菌相对丰富与持续的生物反应器性能相关,这表明与anammox细菌的相互相互作用.
- 了解这些微生物相互作用是优化在可变负载条件下生物反应器运行的关键.
- 这项研究强调了除过程的弹性,尽管微生物成分因基质比率的改变而发生变化.
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