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Yue Wang¹, Yihan Bai¹, Liang Xu¹

¹School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.

Environmental research

|January 7, 2025

概括

(Mn) 氧化物通过自的Mnammox和MnOAD过程有效地去除废水中的氨 (NH4+-N). δ-MnO2反应器显示出最高的效率,丰富了关键细菌和Mn循环基因,以增强去除.

科学领域:

环境科学环境科学
微生物学微生物学
水处理工程水处理工程

背景情况:

与氨氧化 (Mnammox) 结合的降解对自然界的循环至关重要.
在废水处理中使用氧化去除自身的方法尚未得到充分研究,并且应用有限.

研究的目的:

建立和评估由不同氧化 (MnOx) 介导的自营氨去除污泥反应器.
在不同的负荷和pH条件下研究NH4+-N去除的性能和机制.
探索微生物群落和循环在增强去除中的作用.

主要方法:

使用 δ-MnO2,β-MnO2,α-MnO2 和天然矿石的污泥反应堆的建造和运行.
在不同操作参数下,在330天内监测NH4+-N去除效率.
微生物社区分析 (16S rRNA基因测序) 和关键功能基因 (Mn循环和N代谢) 的量化.

主要成果:

NH4+-N去除效率按照以下顺序进行: δ-MSR > α-MSR > β-MSR > MOSR.
观察到金属降解和二氧化细菌 (例如,Candidatus Brocadia,Dechloromonas,Pseudomonas) 的显著丰富,特别是在d-MSR中.
一个活跃的循环,证明了生物的MnOx形成和增加的Mn循环基因的丰富性,加上丰富的N代谢基因,促进了有效的去除.

结论:

该研究成功地将Mnammox和依赖的自脱 (MnOAD) 通过废水处理反应堆中的活性循环结合起来.
δ-MnO2介导反应器由于增强的微生物丰富和循环,表现出卓越的性能.
这项研究为在废水处理中应用自身移除技术提供了新的视角.

关键词:

氨的去除氨的去除的周期周期的周期的氧化过程中的.氧化物氧化物驱动氨氧化氧化的MnOx.

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