在依赖酸盐的硫化基自营性脱过程中释放长期的超性压力:解密过程崩和谷氨酸驱动的功能恢复
Kaiyu Zhang1, Xin Zhang1, Fangjian Xu1
1Zhejiang Key Laboratory of Solid Waste Pollution Control and Resource Utilization, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China.
Journal of environmental management
|November 26, 2025
概括
过性破坏了基于硫的自性脱,破坏了污泥并抑制了关键的微生物. 谷氨酸还通过减轻压力和促进有益的微生物相互作用,部分恢复了的去除.
科学领域:
- 环境微生物学环境微生物学
- 生物技术是生物技术.
- 污水处理 污水处理 污水处理
背景情况:
- 基于硫的自无化是一种有前途的碳中和去除方法.
- 过度对这些过程的稳定性和效率构成重大挑战.
研究的目的:
- 在高盐度下研究依赖酸盐的硫化物自化 (NiSAD) 的失败机制.
- 评估谷氨酸补充剂对于过程恢复的有效性.
主要方法:
- 模拟过盐的条件 (5.14%盐度) 诱导压力.
- 评估微生物社区的结构和功能.
- 测量了关键性能指标,如亚酸盐去除效率和活性氧物种 (ROS) 水平.
- 利用分子生态网络分析来研究社区集会.
主要成果:
- 在超度下,由于污泥分解和离子毒性,酸盐去除效率降至22.21%.
- 关键的微生物属 (Sulfurovum,Thiobacillus) 减少,社区集会变得随机.
- 谷氨酸补充剂 (1 mmol/L) 提高了化物和硫化物去除率,分别为47.30%和77.28%.
- 谷氨酸降低了ROS,增加了ATP水平,并将社区集会转向确定性过程.
结论:
- 过度严重损害了NiSAD的表现,因为它破坏了微生物的结构和功能.
- 谷氨酸显示了减轻高盐度压力的潜力,并恢复了NiSAD的效率.
- 了解微生物社区动态对于优化在具有挑战性的环境中的脱过程至关重要.
相关概念视频
Metabolism of Chemolithotrophs
733
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.
733
Inorganic Nitrogen Assimilation
436
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...
436
Sulfur Assimilation
302
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
302
Carbon-dioxide Fixation
602
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...
602
Anoxygenic Photosynthesis
1.1K
Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green...
1.1K
Microbial Nutrition
1.0K
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...
1.0K


