在不同反流比的部分化/anammox过程中去除和氧化排放
Zexi Zhang1, Wei Xing1, Jia Lu1
1Beijing International Scientific and Technological Cooperation Base of Water Pollution Control Techniques for Antibiotics and Resistance Genes, Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Beijing 100044, PR China.
The Science of the total environment
|October 3, 2023
概括
优化部分化/亚纳摩克斯 (PN/A) 工艺以200%的反流率显著提高了去除效率,并减少了N2O排放. 这种废水处理方法提高了微生物群体的平衡,以提高性能.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 部分化/亚纳摩克斯 (PN/A) 工艺在废水处理中受到青,因为其对空气的需求较低,并且缺乏外部碳源的要求.
- 在PN/A过程中化物的积累会对的去除产生负面影响,并增加氧化 (N2O) 的排放.
- 废水反流可以减轻酸盐的积累,平衡去除效率和N2O释放.
研究的目的:
- 研究不同反流比对PN/A过程中去除效率的影响.
- 为了确定在PN/A处理过程中最大限度地减少N2O排放的最佳反流比.
- 为了阐明微生物群落的变化,以应对不同的反流率.
主要方法:
- 该研究采用了联合和酸盐氧化 (CANON) 工艺,影响的度约为300 mg/L.
- 反流率从0%到300%之间有系统地变化.
- 分析了去除效率,N2O排放因子和微生物群体组成 (特别是氨氧化细菌和无氧氨氧化细菌).
主要成果:
- 200%的反流比产生了最高的氨 (98.2 ± 0.8%) 和总 (77.8 ± 2.3%) 清除效率.
- 200%的反流率导致了最低的N2O排放因子 (2.21%),与没有反流相比减少了31.74%.
- 最佳反流比与更高的无氧氨氧化细菌 (30.98%) 和较低的氨氧化细菌 (9.57%) 相相关.
结论:
- 对于PN/A工艺来说,200%的反流比是最优的,最大限度地去除和最大限度地减少N2O排放.
- 废水反流有效地管理化物积累,提高工艺稳定性和环境性能.
- 这些发现为优化PN/A流程提供了理论基础,以提高废水处理的效率和减少温室气体排放.
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