发展化和以元素硫为基础的脱/anammox (NS0DA) 工艺,用于主流的去除
Yuanjun Liu1, Yangfan Deng1, Mark C M van Loosdrecht2
1Department of Civil and Environmental Engineering, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and Water Technology Center, The Hong Kong University of Science and Technology, Hong Kong, China; The Hong Kong University of Science and Technology, Shenzhen Research Institute, Shenzhen 518000, China.
Water research
|May 23, 2025
概括
一个新的NS0DA工艺通过化和基于硫的脱/anammox稳定地从废水中去除. 这种碳中和方法显著减少了氧化排放和有机碳需求.
科学领域:
- 环境工程 环境工程
- 微生物学 微生物学
- 生物技术是生物技术.
背景情况:
- 主流的无氧氨氧化 (anammox) 提供碳中和的废水处理,但难以稳定化物供应.
- 传统的化/脱化工艺有较高的氧气和有机碳需求,可以排放氧化.
研究的目的:
- 开发和评估一种新的化和基于元素硫的部分自化脱/anammox (NS0DA) 工艺,以有效地消除主流.
- 评估系统的去除效率,氧化排放和微生物社区动态.
主要方法:
- 两个反应堆系统:一个化反应堆和一个基于元素硫的化和anammox (S0DA) 反应堆.
- 在集成之前,每个反应堆的独立启动和优化.
- 同位素实验,动力分析,高通量测序和元基因组分析以阐明机制和微生物群落.
主要成果:
- 在主流条件下 (48.5 mg NH4+-N/L, 25 °C) NS0DA 系统实现了 89.1% 的总去除效率.
- 该系统在短HRT (2小时) 的S0DA反应堆中证明了低N2O排放因子 (0.23%) 和高去除率 (0.53公斤N/(m3·d)).
- 鉴定出亚纳莫克斯细菌 (Candidatus Brocadia) 和硫氧化细菌 (Thiobacillus) 是关键的参与者,其中聚硫化物增强了硫利用率.
结论:
- NS0DA 工艺为废水处理中的主流除提供了稳定,高效和具有成本效益的解决方案.
- 这项技术最大限度地降低了氧气需求,消除了有机碳需求,与传统方法相比,显著减少了N2O排放.
- NS0DA过程为实现碳中和废水处理目标提供了一个有希望的替代方案.
相关概念视频
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
Overview of Nitrogen Metabolism
8.6K
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...
8.6K
Inorganic Nitrogen Assimilation
120
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...
120
Anoxygenic Photosynthesis
193
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...
193
Bioremediation
20.4K
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.
20.4K
Environmental Applications of Microorganisms
309
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...
309


