通过细胞外电子受体生物炭增强无氧氨氧化性能的机制研究
Li Zhang1, Qi Jiang1, Diannan Huang1
1School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang, People's Republic of China.
Environmental technology
|July 21, 2023
概括
生物炭可以作为无氧氨氧化 (Anammox) 废水处理中的电子受体. 这项研究证明了它的有效性,实现了超过60%的氨去除,并促进了特定的功能性细菌.
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
- 生物地质化学循环是什么
背景情况:
- 无氧氨氧化 (Anammox) 是传统脱化的一种经济有效的替代方案.
- 生物炭在Anammox过程中作为电子受体的作用需要进一步调查.
- 了解电子转移机制对于优化去除至关重要.
研究的目的:
- 研究使用生物炭作为无氧氨氧化中的电子受体的可行性.
- 为了确定废水中生物炭介导Anammox的最佳条件.
- 为了分析微生物社区在应对生物炭应用时的变化.
主要方法:
- 在无氧氨氧化系统中使用生物炭进行了批量和长期实验.
- 确定了最佳的工艺变量,包括氨的度和生物炭剂量.
- 进行了微生物社区分析,以确定主导细菌和转移.
主要成果:
- 生物炭添加促进了无氧氨氧化,达到超过60%的NH4+-N去除效率.
- ΔNO3−-N/ΔNH4+-N 的比率接近 0.19 的理论值.
- 稳定的系统电压波动表明,使用生物炭作为电子接受器的功能性细菌占主导地位.
- 观察到 *norank_f__norank_o__SBR1031* (Chloroflexi) 的显著增加和 *Candidatus_Kuenenia* 的轻微减少.
结论:
- 生物炭在废水处理的无氧氨氧化中有效地作为电子受体起作用.
- 在特定条件下 (30-50 mg/L NH4+-N,10 g/L 生物炭) 这个过程是可行的.
- 生物炭的应用改变了微生物群落的结构,有利于特定的功能性细菌来增强去除.
相关概念视频
01:15Metabolism of Chemolithotrophs
48
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.
48
01:22Inorganic Nitrogen Assimilation
49
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...
49
01:29Fermentation
115.4K
Most eukaryotic organisms require oxygen to survive and function adequately. Such organisms produce large amounts of energy during aerobic respiration by metabolizing glucose and oxygen into carbon dioxide and water. However, most eukaryotes can generate some energy in the absence of oxygen by anaerobic metabolism.
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
115.4K
00:46Bioremediation
19.0K
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.
19.0K
01:28Microbial Nutrition
89
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...
89
01:30Environmental Applications of Microorganisms
61
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...
61