硫化物促进了anammox低强度废水处理系统中的去除
Wenquan Chen1, Xinyuan Chen1, Yanxin Wu1
1College of Environment and Resources, Xiangtan University, Hunan Province, 411105, China.
Journal of environmental management
|September 22, 2024
概括
将硫化物添加到废水处理中,通过结合Anammox和硫自无化 (SAD) 来增强的去除. 这种协同作用提高了总去除效率 (TNRE) 和去除效率 (NRE),即使入量低.
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
- 生物地质化学循环的过程
背景情况:
- 氧化 (Anaerobic Ammonium Oxidation) 是一种具有成本效益的脱工艺,但废水中酸盐可以限制总去除效率 (TNRE).
- 硫自脱 (SAD) 提供了一种补充的去除方法.
- 整合Anammox和SAD可以克服局限性并增强整体去除.
研究的目的:
- 调查Anammox和SAD对增强TNRE的联合作用.
- 为了评估不同硫化物度对Anammox和SAD性能的影响.
- 阐明硫化物影响去除过程的机制.
主要方法:
- 一个长期测试是在上游无氧污泥毯 (UASB) 反应堆中进行的.
- 影响性氨度保持在30毫克L-1.
- 为了评估它们的影响,添加了不同度的硫化物 (0,10和20毫克L-1).
主要成果:
- 添加硫化物10毫克L-1显著增强NRE从92.55%到94.10%和TNRE从74.56%到89.51%.
- 硫化物度为20毫克L-1导致TNRE降至81.13%,表明抑制作用.
- 20毫克L-1硫化物的抑制作用在减少到0毫克L-1时是可逆的,微生物分析显示SAD相关人群增加.
结论:
- 硫化物作为SAD的电子捐赠体,促进酸盐转化为N2并降低废水中酸盐水平.
- 硫化物还抑制了化细菌的活动,可能优化了Anammox过程.
- 安纳莫克斯和SAD之间存在协同作用的关系,这表明在低强度废水中增强TNRE的潜力.
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