转向生物学促进了地下水过器中高效的铁去除
Simon Müller1, Francesc Corbera-Rubio1, Frank Schoonenberg Kegel2
1Delft University of Technology, the Netherlands.
Water research
|July 27, 2024
概括
砂中的轻度通风可增强生物铁的去除效果,优于强度通风. 这种方法通过促进有益的微生物活动来减少堵塞并增加水产.
科学领域:
- 环境科学 环境科学
- 水处理工程水处理工程
- 微生物学 微生物学
背景情况:
- 快速沙子过器对于地下水处理至关重要,可以去除铁和等污染物.
- 传统的方法使用密集的通风,这可能导致过器因去除花铁而堵塞.
- 了解去除铁的途径是优化砂器性能的关键.
研究的目的:
- 为了比较不同通风强度在沙过器中去除铁的有效性.
- 阐明同质,异质和生物铁去除途径的作用.
- 为了确定有利于生物铁去除的操作控制.
主要方法:
- 两个全尺寸的沙子过器在不同的通风强度 (低与高) 下并行运行.
- 对铁的氧化率和去除效率进行了监测.
- 使用显微镜和DNA分析来识别铁的固体结构和微生物存在 (Gallionella ferruginea).
主要成果:
- 轻度通风 (低过器) 促进了生物铁的去除,与强度通风 (高过器) 相比,氧化率达到两倍.
- 在LOW过器中观察到Gallionella ferruginea的独特生物标志,其排水中的DNA复制数量是其排水中的10倍.
- 低过器中的生物铁固体导致阻塞速度较慢,减少反冲洗频率,并使每次运行的水产量增加四倍.
结论:
- 通过调整通风强度,可以积极控制和优化生物铁氧化,而不是物理化学路径.
- 轻度通风导致更紧和潜在的有价值的氧化铁固体.
- 减缓最初的铁氧化可以使生物过器中更有效地去除铁.
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