硫介导细菌在缺乏碳的废水中优于糖原积聚生物:影响C/S比率的关键作用
Boyi Cheng1, Lei Chen1, Lichang Zhou1
1School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China.
Fundamental research
|February 6, 2026
概括
在缺乏碳的废水中,添加元素硫 (S0) 可以通过促进硫介导细菌 (SMB) 超过糖原积累生物 (GAO) 来增强生物营养物质的去除,从而提高生物营养物质的去除. 优化碳与S0的比率是抑制GAO扩散和提高废水处理效率的关键.
科学领域:
- 环境微生物学 环境微生物学
- 水处理工程水处理工程
- 生物地质化学生物地质化学
背景情况:
- 由于有机碳来源有限,生物营养物质的去除往往面临挑战.
- 这种限制可能导致糖原蓄积生物 (GAO) 的过度生长,阻碍治疗效率.
- 元素硫 (S0) 是废水处理的潜在经济性电子捐赠者.
研究的目的:
- 调查碳 (C) 到S0比对硫媒介细菌 (SMB) 和 GAO之间的竞争的长期影响.
- 探索使用S的可行性,以部分取代碳来源并抑制GAO的扩散.
- 为了揭示在不同的C/S0条件下,中小企业和一般政府组织之间的竞争机制.
主要方法:
- 四个并行生物反应器运行了约100天,不同的酸盐-COD与S比率 (0.28,0.14,0.07和0).
- 基质组成包括酸-COD和一定量的元素硫 (S).
- 监测了细菌群体的动态和代谢活动,以评估中小企业和 GAO之间的竞争.
主要成果:
- 高 (0.28) 和低 (0.07,0) 的C/S比率促进了S代谢 (减少或氧化),有利于SMB增长而不是GAO.
- 0.14的C/S0比率导致GAO占主导地位,因为它们的酸盐吸收率更高.
- 特定的细菌系如*Desulfobacter*,*Desulfuromonas*和*Thiobacillus*与SMB有关,而*Candidatus_Competibacter*代表了GAO.
结论:
- 适当的C/S比对于提高中小企业在生物废水处理中对GAO的竞争力至关重要.
- 在碳有限的环境中,可以有效地利用元素硫来管理GAO的扩散.
- 这项研究提供了一种机制性策略,以促进中小企业超过GAO,提高营养物质去除效率.
相关概念视频
Key Elements for Plant Nutrition
24.3K
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
24.3K
The Sulfur Cycle
52.0K
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
52.0K
The Roles of Bacteria and Fungi in Plant Nutrition
47.4K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
47.4K
Sulfur Assimilation
356
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...
356
The Carbon Cycle
43.9K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
43.9K
Organic Compounds
57.5K
All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
57.5K


