侧流生物P和主流anammox在BNR过程中与上游碳捕获
Kester McCullough1,2, Stephanie Klaus2, Christopher Wilson2
1modelEAU, Département de génie civil et de génie des eaux, Université Laval, Québec City, Québec, Canada.
概括
这项研究表明,在A/B过程中,成功的生物去除 (bio-P) 与快捷去除 (SNR) 相结合. 将发酵废弃物活性污泥 (WAS) 添加到侧流反应堆中,使生物能即使具有较低的挥发性脂肪酸 (VFA) 影响.
科学领域:
- 环境工程 环境工程
- 废水处理技术 废水处理技术
- 生物技术是生物技术.
背景情况:
- 由于碳需求相互冲突,将生物去除 (bio-P) 与捷径去除 (SNR) 整合起来很困难.
- 对于SNR的上游碳转移减少了挥发性脂肪酸 (VFA),阻碍了生物P.
研究的目的:
- 在一个上游碳捕获系统中实现同时SNR (通过PNA或PdNA) 和生物P.
- 在A/B过程中评估侧流反应堆的有效性,在A/B过程中为生物P添加发酵剂.
主要方法:
- 试点规模的A/B工艺与侧流生物P反应堆和三级anammox MBBR.
- 从A阶段向侧流反应堆添加发酵废物活性污泥 (WAS).
- 监测酸盐的积累,氨的去除,和废水总无机 (TIN).
主要成果:
- 生物去除在B阶段实现了,尽管rbCOD的影响很低,由于添加了发酵剂.
- 亚酸盐的积累是通过部分脱和部分化 (NOB外选择) 来发生的.
- 废水总无机 (TIN) 低于2 mg/L,使用三级anammox MBBR抛光实现.
结论:
- 添加发酵剂的侧流反应器可以在B阶段系统中实现生物P,VFA的影响最小.
- 增强的生物去除对间歇性通风具有坚固性,并且在各种SRT中稳定.
- 部分化和部分脱是可行的化生产下游的anammox在A/B过程中与侧流生物-P.
相关概念视频
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
01:15Metabolism of Chemolithotrophs
45
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.
45
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
01:28Carbon-dioxide Fixation
40
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...
40
01:20Overview of Nitrogen Metabolism
8.1K
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...
8.1K
01:22Inorganic Nitrogen Assimilation
48
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...
48