电介导的阴极氧驱动了电活性细菌的呼吸链电子转移,以增强耐火有机生物氧化
Guang Yang1, Yudong Luo2, Yanhong Bian2
1State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
Water research
|October 8, 2024
概括
这项研究揭示了阴极中的氧气如何影响电介导生物系统 (EMBS). 高电机力通过影响微生物新陈代谢和电子转移来增强耐火有机降解,这对于废水处理至关重要.
科学领域:
- 环境微生物学环境微生物学
- 生物技术是生物技术.
- 电化学 电化学 电化学
背景情况:
- 电介导生物系统 (EMBS) 使用生物反应堆中的生物阳极和阴极.
- 供应给阴极的氧气可以扩散,影响阳极的无氧环境.
- 了解氧气对阳极代谢和电子运输的影响对于EMBS优化至关重要.
研究的目的:
- 调查阴极氧对EMBS中耐火有机降解的影响.
- 阐明微生物新陈代谢和在电机力下调节电子运输链的机制.
- 评估氧气扩散在阳极微生物社区结构和功能中的作用.
主要方法:
- 利用一个电介导的生物系统与生物阳极和阴极组件.
- 引入了N,N-二甲基形式胺 (DMF) 作为一种耐火有机污染物的模型.
- 采用元基因组分析来研究微生物社区结构和代谢途径.
- 在不同的电机力条件下测量了降解速率和氨化百分比.
主要成果:
- 高电机力加速了DMF降解 (0.53h-1) 和氨化 (26.6%).
- 升高的电机力丰富了电活性细菌,并增强了阳极的电子转移.
- 阳性微空气条件破坏了微生物群落,抑制了降解.
- 甲基因组学表明,阴极氧气上调 pyruvate 代谢和 TCA 循环,产生 NADH 和 ATP.
结论:
- 电极氧通过电机力通过调节微生物新陈代谢和电子运输来增强耐火有机氧化.
- 在EMBS中优化氧气管理对于防止阳极污染和最大限度地提高效率至关重要.
- 结果为开发工业废水预处理的先进EMBS提供了洞察力.
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