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在微氧条件下增强Feammox的氨氧化和铁循环

Tuo Wang¹, Mou Zhang¹, Nana Jiang¹

¹MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin 300350, China.

Environmental research

|March 21, 2025

概括

微氧显著增强无氧氧化与Fe(III) 减少 (Feammox) 的作用,提高了废水处理的铁循环速度和维持铁循环. 这种方法支持关键的细菌功能,并为低C/N废水挑战提供了切实可行的解决方案.

科学领域:

环境科学环境科学
微生物学微生物学
水处理技术水处理技术

背景情况:

自营无氧氨氧化与Fe(III) 减少 (Feammox) 结合,是一种有前途的废水处理技术.
目前的Feammox应用面临由于氨氧化速度缓慢和需要连续Fe (III) 源的限制.

研究的目的:

研究微氧策略的有效性,以提高Feammox的性能.
阐明微氧对氧化和铁循环的影响背后的机制.

主要方法:

在Feammox系统中实施微氧战略.
监测氨氧化率和铁物种化 (维维亚尼特和白酸盐).
分析氨一氧化酶 (AMO) 基因表达和酶活性.

主要成果:

与无氧条件相比,微氧增加了氧化率高达5.7倍.
微氧战略有效地推动了铁循环,促进了Fe (II) 和Fe (III) 的相互转化.
氨氧化被证实是AMO依赖的,在微氧下,AMO基因表达和AMO活性显著增加.

结论:

微氧是一种可行的策略,可以克服Feammox瓶,提高效率和可持续性.
这项研究提供了Feammox的机理洞察力,突出了AMO和铁循环的作用.
这种方法为Feammox在低C/N废水处理中的实际应用提供了宝贵的见解.

关键词:

氨基单氧化酶是一种氨基氧化酶.氨氧化氧化的氨.在Feammox中使用Feammox.铁的循环铁的循环微氧环境是一个微氧环境.

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