自由氨,自由酸,溶解氧和盐度对高盐化稳定性的影响
Samah Abasi1, Sheldon Tarre1, Michal Green1
1Faculty of Civil and Environmental Engineering, Technion - Israel Institute of Technology, Haifa, 32000, Israel.
Chemosphere
|July 22, 2025
概括
使用高度的自由氨 (FA) 实现了稳定的高酸盐化,即使在重复的酸盐氧化细菌 (NOB) 繁殖的情况下也是如此. 高盐度选择性地抑制了NOB,为废水处理提供了洞察力.
科学领域:
- 环境微生物学环境微生物学
- 废水处理工程 废水处理工程
- 生物反应器的设计和运行
背景情况:
- 含有氨的和高的工业废水越来越普遍,需要有效的除策略.
- 部分化-安纳摩克斯工艺需要稳定的化反应器,特别是在研究较少的高度条件下.
- 了解酸盐氧化细菌 (NOB) 的抑制作用对于优化高盐酸化至关重要.
研究的目的:
- 在连续和混合固定床反应堆中研究高盐化稳定性和性能.
- 检查自由氨 (FA),自由酸 (FNA),溶解氧 (DO) 和盐度对NOB抑制的影响.
- 确定关键的微生物参与者以及成功的高盐化条件.
主要方法:
- 高盐度 (4%盐度) 化反应堆的长期 (202天) 运行.
- 控制自由氨 (FA),自由酸 (FNA) 和溶解氧 (DO) 水平的变化.
- 监测化性能和微生物群落的转移,包括NOB的扩散.
主要成果:
- 在高盐水条件下使用高FA度 (1-10毫克N/L) 维持稳定的化202天.
- 低FA水平 (<1毫克N/L) 导致NOB (尼托斯) 的增殖和化损失,无论DO.
- 高FA使得NOB扩散后的化恢复成为可能. 高盐度 (>5%) 选择性抑制NOB而不影响化. 在高FNA (0.11毫克N/L) 的情况下,尼特洛科克斯繁殖.
结论:
- 高FA度对于稳定的高盐化和从NOB增殖中恢复至关重要.
- 盐度本身作为对NOB的选择性压力,增强了反应器的稳定性.
- 研究结果为设计高效的高盐化反应堆,用于工业废水处理提供了关键的见解.
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