在适应盐度的部分化系统中生产N2O的机制,用于处理含氨量高的废水
Xiang Li1, Yingxin Jin1, Yanying He1
1School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
Water research X
|February 26, 2025
概括
高盐度显著抑制了废水处理中的部分化 (PN),通过刺激化物减少,增加了氧化 (N2O) 排放. 这项研究揭示了盐度.
科学领域:
- 环境科学 环境科学
- 环境工程 环境工程
- 微生物学 微生物学
背景情况:
- 部分化/安纳莫克斯 (PN/A) 提供有效的生物去除,但面临的挑战是氧化 (N2O) 排放.
- 废水中的高盐度使PN/A过程和N2O排放控制复杂化.
研究的目的:
- 调查盐度对PN性能和N2O排放的长期影响.
- 了解PN系统中盐度诱导的N2O生产背后的机制.
主要方法:
- 在不同盐度条件下对PN反应堆进行比较 (0,2.5和10g NaCl/L).
- 测量氨氧化速率和N2O排放因子.
- 同位素路径分析以确定N2O生产机制.
- 研究污泥特性和微生物群落的变化.
主要成果:
- 高盐度 (10g NaCl/L) 显著抑制了氨氧化和化.
- 随着盐度的增加,N2O排放因子增加,特别是在有氧和无氧阶段.
- 盐度增加了N2O的产量,主要是通过化物还原途径.
结论:
- 盐度对PN性能产生负面影响,并增加N2O排放,主要是通过化物减少.
- 结果为PN/A在高盐度,高氨废水处理中的应用提供了洞察力.
- 了解盐度影响对于减轻PN系统中N2O排放至关重要.
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