通过废铁废料增强亚纳莫克斯对盐度应激的抗性 添加:性能和微生物社区动态
Haozhe Xu1, Manyu Qin1, Zengyi Li1
1School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China.
Journal of environmental management
|July 10, 2025
概括
废铁废料在无氧氧化 (anammox) 系统中增强了耐盐性. 这种具有成本效益的方法在高盐条件下提高了去除率和微生物合作.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 废水处理工程 废水处理工程
背景情况:
- 无氧氨氧化 (anammox) 对于废水中去除至关重要.
- 高度对anammox系统的稳定性和效率构成重大挑战.
- 开发具有成本效益的策略来提高anammox中的盐分耐受性对于实际应用至关重要.
研究的目的:
- 为了研究废铁废料 (WIS) 在增强亚纳莫克斯细菌的盐分耐受性方面的有效性.
- 为了评估WIS对去除率和微生物群落结构在增加盐压力下的影响.
- 阐明WIS在高度环境中提高anammox性能的潜在机制.
主要方法:
- 使用两个anammox反应器进行比较研究:一个是对照反应器 (R1) 和一个是修改了WIS (R2) 的反应器.
- 在两个反应堆中,盐度应力从0%逐渐增加到2.75%.
- 使用网络分析监测去除率 (NRR) 和微生物群体组成.
- 分析涉及铁释放和微生物代谢途径的潜在机制.
主要成果:
- 使用WIS的R2反应堆在2%的盐度下,与R1 (2.3 kg/m3·d) 相比,显著提高了NRR (4.4 kg/m3·d) 的水平.
- 在2.75%的盐度下,R2保持稳定的性能 (NRR为1.8 kg/m3·d),而R1则完全崩.
- 在高盐度下,WIS加强了物种间的合作,并促进了布罗卡迪亚科未分类菌 (Brocadiaceae_unclassified) 的占主导地位,这是一种潜在的新型亚纳莫克斯细菌.
结论:
- 废铁废料是一种具有成本效益的添加剂,可以提高anammox系统的盐分抵抗力.
- WIS提高了高盐废水中去除效率和微生物稳定性.
- 从WIS中释放的铁可能会提高微生物度调节和能量代谢的调节,从而促进盐分耐受性.
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