Influences of Fe2+/Fe3+ and Mn2+ on total nitrogen removal and nitrogen transformations during low-oxygen aeration

Jianmin LI; Qing YANG; Zhibin LIU; Runyu LIU; Bin CUI

doi:10.11949/0438-1157.20190211

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Influences of Fe²⁺/Fe³⁺ and Mn²⁺on total nitrogen removal and nitrogen transformations during low-oxygen aeration

更新时间：2026-03-25

- Influences of Fe²⁺/Fe³⁺ and Mn²⁺on total nitrogen removal and nitrogen transformations during low-oxygen aeration
- CIESC Journal Vol. 70, Issue 9, Pages: 3503-3510(2019)
- 作者机构：
  
  北京工业大学环境与能源工程学院,北京,100124
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190211
  CLC： TQ028.8
- Online First：05 September 2019，
  
  Published：05 September 2019
- 稿件说明：
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Jianmin LI, Qing YANG, Zhibin LIU, et al. Influences of Fe²⁺/Fe³⁺ and Mn²⁺on total nitrogen removal and nitrogen transformations during low-oxygen aeration[J]. CIESC Journal, 2019, 70(9): 3503-3510. DOI: 10.11949/0438-1157.20190211.
DOI：

Jianmin LI, Qing YANG, Zhibin LIU, et al. Influences of Fe²⁺/Fe³⁺ and Mn²⁺on total nitrogen removal and nitrogen transformations during low-oxygen aeration[J]. CIESC Journal, 2019, 70(9): 3503-3510. DOI: 10.11949/0438-1157.20190211. DOI：

摘要

为短期快速实现实际生活污水自养脱氮，采用含有厌氧氨氧化菌的实际污水处理厂活性污泥，针对Fe2+/Fe3+和Mn2+对低氧曝气过程中氮的去除效果进行了研究，分析确定了氮素转化的途径。研究结果表明，Fe2+/Fe3+和Mn2+均可提高活性污泥中厌氧氨氧化菌（AnAOB）丰度，但由于Fe2+/Fe3+对氨氧化菌（AOB）也存在一定抑制作用，因此，短期投加Fe2+/Fe3+条件下，低氧曝气过程中总无机氮去除率为25%，但投加Mn2+条件下总无机氮去除率可达44%。通过氮素平衡分析，发现投加Fe2+/Fe3+条件下，氮素主要通过反硝化作用去除；而投加Mn2+条件下，氮素主要通过厌氧氨氧化（anammox）作用去除。因此，传统活性污泥可通过短期投加Mn2+增强厌氧氨氧化活性，促进低氧曝气过程中氮的去除，利于快速实现一体化自养脱氮。

Abstract

To quickly realize the autotrophic denitrification of actual domestic sewage in the short term

the activated sludge from the actual sewage treatment plant containing anammox bacteria was used to study the removal effect of nitrogen in the process of hypoxia aeration for Fe2+/Fe3+ and Mn2+. The results showed that both Fe2+/Fe3+ and Mn2+ can increase the abundance of anammox bacteria (AnAOB) in activated sludge

but Fe2+/Fe3+ had a certain inhibitory effect on ammonia oxidizing bacteria (AOB); therefore

the total inorganic nitrogen removal rate was 25% in the presence of Fe2+/Fe3+ under short-term dosing

but the total inorganic nitrogen removal rate was 44% in the presence of Mn2+. Nitrogen balance analysis showed that nitrogen transformation was mainly denitrification under the condition of Fe2+/Fe3+; but was mainly anaerobic ammonium oxidation (anammox) process under the condition of Mn2+. Therefore

the anammox activity could be enhanced in traditional activated sludge by short-term addition of Mn2+

promoting the removal of nitrogen during the low-oxygen aeration

and facilitating the rapid achievement of integrated autotrophic nitrogen removal.

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