沉积铁的现场先进氧化,用于下水道中的硫化物控制
Yanchen Liu1, Zhiqiang Zuo1, He Li1
1State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
Water research
|May 29, 2023
概括
这项研究引入了一种先进的氧化工艺,用于控制下水道硫化物. 通过氧化沉积物中的硫化铁 (FeS),它产生基基 (·OH) 以有效去除硫化物和减少微生物活动.
科学领域:
- 环境工程 环境工程
- 水质管理水质管理
- 微生物生态学 微生物生态学
背景情况:
- 硫化物控制是城市下水道系统的一个关键挑战.
- 目前的下水道化学剂量方法往往是昂贵和低效的.
- 高硫化物水平导致气味,腐蚀和健康风险.
研究的目的:
- 开发和评估一种新的现场先进氧化工艺,用于控制下水道沉积物中的硫化物.
- 调查硫化铁 (FeS) 氧化产生基基 (·OH) 的功效.
- 评估该过程对微生物硫酸盐减少活性和整体硫化物减少的影响.
主要方法:
- 在受控条件下的三个实验室下水道沉积物反应堆的长期运行.
- 在一个反应堆中实施先进的现场FeS氧化工艺.
- 硫化物度和微生物活性与只有氧或没有处理的控制反应堆的比较.
- 机理学研究以阐明基基 (·OH) 的作用.
主要成果:
- 先进的FeS氧化反应器显著降低了硫化物度,达到3.1±1.8毫克S/L.
- 对照反应堆的硫化物含量较高:9.2±2.7毫克/升 (仅氧气) 和14.1±4.2毫克/升 (没有处理).
- 机理学研究证实了OH在硫化物氧化和微生物群落调节中的关键作用.
结论:
- 拟议的现场先进的FeS氧化是一种高度有效的污水硫化物控制方法.
- 与传统方法相比,该工艺实现了优异的硫化物减少,铁剂量明显降低.
- 该方法为城市下水道管理提供了具有成本效益和效率的解决方案,减少了化学品的消耗.
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