在污水处理的高速无氧/微空气系统中获得了卓越的非化去除
Xiaojie Luo1, Mengya Guo1, Xiangnan Zheng1
1School of Environment, MOE Key Laboratory of Water and Sediment Sciences/State Key Lab of Water Environment Simulation, Beijing Normal University, Beijing, 100875, China.
Chemosphere
|May 20, 2024
概括
在微空气活性污泥系统中引入无氧区显著改善了生物和的去除. 这种增强源于无氧无化的去除和改造的微生物群落,导致更高效的废水处理.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 环境工程 环境工程
背景情况:
- 加强生物去除 (EBPR) 对于废水处理至关重要.
- 微空气活性污泥 (MAS) 系统具有高处理能力,但可以优化营养去除.
- 无氧区与EBPR微空气条件的作用需要进一步研究.
研究的目的:
- 为了研究将无氧区引入高速 MAS 系统 (A/M 系统) 的效果,以提高生物营养物质的去除.
- 评估对和去除效率,污泥特性和微生物群落结构的影响.
- 为了将A/M系统的性能与传统的生物营养去除过程进行比较.
主要方法:
- 实施高率无氧/微气氧 (A/M) 活性污泥系统.
- 对废水中物种 (NOx-N) 和营养物质去除效率 (总和总) 的分析.
- 使用高通量热测序来分析聚酸盐积聚生物 (PAO) 和氨氧化细菌群体的污泥含量的量化.
主要成果:
- 该A/M系统显著降低了废水中的NOx-N度 (7.2至1.5毫克L-1).
- 总去除率从75%提高到89%,总去除率从18%提高到60%.
- 污泥含量从1.48%增加到1.77% (干重),PAO总含量减少42%,特别影响非DPAO,而DPAO社区保持稳定. 氨氧化细菌的数量增加了39%.
结论:
- 将无氧区引入高速微空气系统可以通过无氧化去化去来增强和的去除.
- 该A/M系统修改了PAO社区结构,有利于特定的分类,同时保持了PAO人口的脱.
- 与传统方法相比,高速率的A/M工艺表现出优越的性能,降低了通风,容量更高,COD要求更低,废渣污泥产量明显减少.
相关概念视频
00:46Bioremediation
18.3K
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.
18.3K
01:20Overview of Nitrogen Metabolism
7.9K
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...
7.9K