寻找氧化物减少细菌存在于氧化物养的Anammox生物膜中
Kohei Oba1, Toshikazu Suenaga2,3, Shohei Yasuda3,4
1Department of Chemical Engineering, Tokyo University of Agriculture and Technology.
Microbes and environments
|March 27, 2024
概括
在anammox反应堆中研究了减少N2O的细菌. 提供额外的N2O丰富的特定细菌,增强N2O减少和识别温室气体减排中的关键微生物参与者.
科学领域:
- 环境微生物学 环境微生物学
- 生物地质化学循环的过程
- 温室气体减排措施 温室气体减排措施
背景情况:
- 氧化 (N2O) 是一种强大的温室气体,在生物除过程中产生.
- 减少N2O的细菌对于减轻N2O排放至关重要.
- 在anammox过程中N2O降解剂的作用仍然不太清楚.
研究的目的:
- 在一个anammox反应堆中调查N2O减速剂的身份,遗传潜力和活性.
- 测试N2O限制和外源N2O供应丰富特定的N2O减少细菌的假设.
- 确定关键的细菌群体,负责在anammox系统中减少N2O.
主要方法:
- 在使用膜生物膜反应器 (MBfRs) 的anammox联盟中化N2O降低细菌1200天.
- 应用15N标记测试来评估N2O沉积潜力.
- 定量PCR,16S rRNA amplicon测序,以及用于微生物社区和遗传分析的猎枪元基因组学.
主要成果:
- 外源N2O供应丰富的生物质,具有更高的N2O沉积潜力.
- 携带N2O的降低N2O的细菌,包括Anaerolineae和Ignavibacteria,被确定为关键的N2O降低剂.
- 发现dehalococcoidia和clostridia是主要的N2O下水槽,这可能是由于它们的维生素B12依赖的代谢途径.
结论:
- 这项研究阐明了特定的减少N2O的细菌在anammox过程中的关键作用.
- 外源N2O供应可以丰富和增强这些有益微生物的活动.
- 这些发现有助于制定有针对性的战略,以减少废水处理中的N2O排放.
相关概念视频
Overview of Nitrogen Metabolism
7.9K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
7.9K
2° Amines to N-Nitrosamines: Reaction with NaNO2
4.2K
Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.
4.2K
Bioremediation
18.3K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.3K
Preparation of Amines: Reduction of Oximes and Nitro Compounds
3.6K
Oximes can be reduced to primary amines using catalytic hydrogenation, hydride reduction, or sodium metal reduction. The reduction of aliphatic and aromatic nitro compounds to primary amines takes place by either catalytic hydrogenation or by using active metals like Fe, Zn, and Sn in the presence of an acid.
Though catalytic hydrogenation can reduce nitrobenzenes, the reduction is nonselective in the presence of other functional groups. For instance, if nitrobenzene contains an aldehyde group,...
Though catalytic hydrogenation can reduce nitrobenzenes, the reduction is nonselective in the presence of other functional groups. For instance, if nitrobenzene contains an aldehyde group,...
3.6K
The Nitrogen Cycle
52.1K
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
52.1K
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview
3.3K
Nitrous acid and nitric acids are two types of acids containing nitrogen, among which nitrous acid is weaker than nitric acid. Nitrous acid with a pKa value of 3.37 ionizes in water to give a nitrite ion and the hydronium ion.
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
3.3K


