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氧与和的比率作为微氧生物氧化氧化中氧气供应管理的指标

Xiaofang Yan¹, Dandan Liu², Sanne M de Smit¹

¹Environmental Technology, Wageningen University & Research, P.O. Box 17, 6700 AA Wageningen, the Netherlands.

|July 5, 2024

概括

控制微生物电解细胞 (MEC) 中的氧气供应是清除氨的关键. 氧2/NH4+-N比率有效平衡氧化速率和气选择性,优于溶解氧水平.

科学领域:

环境科学环境科学
生物技术是生物技术.
化学工程是化学工程的重要组成部分.

背景情况:

微生物电解细胞 (MEC) 对于氨 (NH4+) 氧化是有效的.
氧 (O2) 对于MEC的高去除率至关重要,但需要精确的控制.
目前的方法重点是溶解氧 (DO),但正在寻找更有效的参数.

研究的目的:

介绍并评估O2/NH4+-N比率作为MEC的新控制参数.
将O2/NH4+-N比率与DO水平的有效性进行比较.
优化氧气剂量,以有效地去除氨和气选择性.

主要方法:

在不同氧气条件下的MEC中研究了氨氧化.
引入并监测O2/NH4+-N比率作为控制参数.
分析的产品分布 (N2,NO3,N2O) 和微生物群落.

主要成果:

在氧气供应方面,O2/NH4+-N比率比DO更为相关的指标.
一个O2/NH4+-N比率为0.5,优化了N2选择性 (51.4%) 和氧化率 (344.6 mg-N/L*d).
添加氧气增加了NH4+氧化,但有利于酸盐的产生;电极的使用有利于N2的产生.

结论:

氧2/NH4+-N比为MEC中氧气剂量提供了更好的控制.
最佳的氧气水平平衡了氧化效率与所需的产品选择性 (N2).
这些发现为加强MEC的氨去除策略提供了实际指导方针.

关键词:

氨氧化的氨氧化过程生物解热器是生物解热器.功能性微生物的.的选择性的选择性提供氧气供应提供氧气供应

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