对生物电化学反应堆中酸盐去除的性能和微生物社区分析
Han Li1,2,3,4, Ying Cui2, Fei Wang2
1School of Environment, Henan Normal University, Xinxiang, Henan, P. R. China.
PloS one
|September 14, 2023
概括
用各种微生物来源确定了电化学脱的最佳电压. 低电流增强了土壤中的微生物多样性,但在污泥中减少了微生物多样性,影响了特定的细菌群体,如 Pseudomonas 和 Fusibacter.
科学领域:
- 环境微生物学 环境微生物学
- 电化学 电化学 电化学
- 生物电化学系统 生物电化学系统
背景情况:
- 酸盐的去除对于水质管理至关重要.
- 微生物电解细胞 (MEC) 为脱提供了一个有前途的方法.
- 了解不同电化学条件下的微生物社区动态是必不可少的.
研究的目的:
- 在电化学装置中研究使用不同微生物注射剂去除酸盐的效率.
- 为了确定在反流污泥,通风污泥和根土中进行脱的最佳应用电压.
- 分析应用电压对微生物群落结构和多样性在正极生物膜中的影响.
主要方法:
- 利用反流污泥,通风污泥和根土作为微生物注射源.
- 采用电化学装置以变化应用电压进行脱.
- 在阴极生物膜上进行高通量测序,以分析微生物群落.
主要成果:
- 脱的最佳电压为反流污泥的0.7V,气污泥和根土的0.5V.
- 低电流增加了土壤注射物中的微生物多样性,但减少了污泥注射物中的微生物多样性.
- 施加的电压显著改变了关键的脱细菌的丰富性,包括 Pseudomonas 的减少和 Fusibacter 和 Azoarcus 的增加.
结论:
- 电化学脱效率取决于微生物注射源和应用电压.
- 施加的电压会影响微生物群落的结构和多样性,对不同的免疫物有不同的影响.
- MECs显示出去除酸盐的潜力,但要有效应用,需要仔细优化电压和微生物源.
相关概念视频
Metabolism of Chemolithotrophs
40
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
40
Environmental Applications of Microorganisms
55
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
55
Inorganic Nitrogen Assimilation
43
Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
43
Microbial Nutrition
57
Organisms exhibit remarkable metabolic diversity, categorized based on how they acquire energy and carbon. These strategies enable survival in various ecological niches and are essential for maintaining energy flow and nutrient cycling within ecosystems.Energy and Carbon SourcesOrganisms are classified as phototrophs or chemotrophs based on energy acquisition. Phototrophs use light as their energy source, while chemotrophs rely on oxidizing chemical compounds. Further differentiation arises...
57


