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

被引：0
|
作者：
Li J. [1 ]
Yang Q. [1 ]
Liu Z. [1 ]
Liu R. [1 ]
Cui B. [1 ]
机构：
[1] College of Environmental and Energy Engineering, Beijing University of Technology, Beijing
来源：
Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 09期
关键词：
Conventional activated sludge; Iron ion; Manganese ion; Nitrogen removal; Nitrogen transformation;
D O I：
10.11949/0438-1157.20190211
中图分类号：
学科分类号：
摘要：
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. © All Right Reserved.
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页码：3503 / 3510
页数：7
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