耐寒细菌联盟在低温下通过高效的去除
Yilin Xu1, Nyambane Clive Ontita1, Weimin Zeng2
1School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
Bioresource technology
|June 16, 2025
概括
一个新的耐寒细菌联盟 (M2) 在低温下有效地去除废水处理中的. 这一突破解决了寒冷气候地区的一个关键挑战,即改善冬季废水管理.
科学领域:
- 环境微生物学 环境微生物学
- 废水处理工程 废水处理工程
背景情况:
- 污水处理工艺在低温 (<15°C) 时除效率降低的情况下扎.
- 感冒引起的压力对负责循环的微生物联盟产生负面影响.
研究的目的:
- 开发和评估一种耐寒细菌联盟 (M2),用于在低温废水处理中增强去除.
- 调查M2在寒冷压力下的弹性和效率背后的机制.
主要方法:
- 开发一种耐寒细菌联盟 (M2).
- 在低温下评估去除效率 (NH4+-N,NO3--N,NO2--N).
- 微生物群落组成的分析 (占主导地位的属).
- 超基因组分析以确定抗寒基因和途径.
主要成果:
- 财团M2实现了高除效率:NH4+-N的97.34%,NO3--N的97.13%,NO2--N的59.92%.
- 在M2中占主导地位的是Comamonas,Pseudomonas和Acinetobacter,它们产生细胞外聚合物质 (EPS) 和不和脂肪酸.
- 基因组分析揭示了对寒冷冲击反应的基因 (例如,不和脂肪酸合成酶,cpsA),有助于抗寒性.
- 在寒冷压力下,M2表现出增强的同化和酸盐减少.
结论:
- 耐寒细菌联盟M2为改善冬季废水处理中的去除提供了一个实用的解决方案.
- M2的弹性归因于EPS的产生,不和脂肪酸和特定的冷冲击反应基因.
- 该战略有效地解决了冷气候废水管理的运营局限性.
更多相关视频
08:05Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
Published on: October 7, 2020
6.2K
09:05Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials
Published on: May 15, 2015
14.9K
相关概念视频
Hyperthermophilic Bacteria
114
Domain Bacteria includes some unique hyperthermophilic species. They exhibit remarkable adaptations that enable survival in extreme environments.Thermotoga species are rod-shaped, gram-negative, non-sporulating hyperthermophiles that form a sheath-like envelope called a toga. They ferment sugars or starch, producing lactate, acetate, CO₂, and H₂, and can also grow via anaerobic respiration using H₂ and ferric iron. Found in hot springs and hydrothermal vents, over 20% of their...
114
Carbon-dioxide Fixation
94
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
94
Metabolism of Chemolithotrophs
192
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.
192
Inorganic Nitrogen Assimilation
118
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...
118
Factors Influencing Microbial Growth: Temperature
265
Microorganisms display remarkable adaptations, enabling them to thrive in diverse ecological niches across a wide range of temperatures. Temperature profoundly influences microbial growth by affecting enzymatic activity, membrane fluidity, and other cellular processes.Each microorganism operates within a specific temperature range defined by three cardinal points: minimum, optimum, and maximum. Below the minimum temperature, membranes lose fluidity, halting transport processes. Above the...
265
Environmental Applications of Microorganisms
302
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...
302
