在不同的操作条件下电活性生物膜的适应:从结构,组成和代谢活动的角度进行综合分析
1College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong, China.
Environmental science and pollution research international
|September 25, 2023
概括
优化操作条件,如电极类型,基质度和电阻,可以显著提高废物处理的电活性生物膜 (EAB). 碳刷电极,低基板和1000 Ω电阻产生了最佳的EAB性能和功率密度.
科学领域:
- 环境微生物学 环境微生物学
- 生物电化学 生物电化学
- 废物处理技术 废物处理技术
背景情况:
- 电活性生物膜 (EAB) 对于废物处理中的细胞外电子转移至关重要.
- 不同的操作条件对EAB的形成和功能的影响仍然不清楚.
研究的目的:
- 调查阳极电极类型,基质度和外部电阻对EAB适应和性能的影响.
- 了解这些因素如何影响EAB微生物结构,组成和代谢活动.
主要方法:
- 在各种条件下培养EAB,操纵阳极材料,基质度 (1.0g L-1 vs. 3.0g L-1),外部电阻 (1000 Ω).
- 性能指标包括启动时间,功率密度,氧化还原能力和内部电阻.
- 分析了微生物社区组成和代谢基因表达.
主要成果:
- 最佳条件 (碳刷电极,1.0 g L-1 基板,1000 Ω 电阻) 导致最短的启动时间 (127.3 h) 和最高功率密度 (0.84 W m-2).
- 这些最佳条件也导致了更强的氧化还原能力,更低的内部电阻,以及更有组织的细菌结构.
- 微生物分析显示,在最佳条件下,电活性细菌的多样性较低,丰度较高 (46.68%),其中直接电子转移 (DET) 主导.
结论:
- 操作条件极大地影响EAB的形成,结构和电化学活性.
- 低基质度和特定的电极/电阻选择促进了高效的电活性细菌群落.
- 结果为优化EAB提供了洞察力,以提高废物处理效率和发电.
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