Simultaneous ferric reduction with ammonia oxidation phenomena in activated sludge in anaerobic environment

被引：0
|
作者：
Li X. [1 ,2 ]
Lin X. [1 ,2 ]
Yang P.-B. [1 ,2 ]
Huang Y. [1 ,2 ]
Liu H.-W. [1 ,2 ]
机构：
[1] School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou
[2] Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou
来源：
| 1600年 / Science Press卷 / 37期
关键词：
Activated sludge; Anaerobic environment; Denaturing gradient gel electrophoresis (DGGE); Ferric reduction and ammonia oxidation; Microbial community;
D O I：
10.13227/j.hjkx.2016.08.037
中图分类号：
学科分类号：
摘要：
In recent years, a few phenomena of ferric reduction and ammonia oxidation (Feammox) have been discovered in Paddy soil, lake sediments and wetland soil, but none was observed in activated sludge. Thus, the Feammox process and the dynamic response of corresponding microbial community in activated sludge were explored by conventional chemical analyses and microbial community denatured gradient gel electrophoresis (DGGE) technique. After 24 d of operation, ammonia transformation occurred. Nitrate and ferrous ion were detected in the reactor, indicating the existence of Feammox process in activated sludge with a reduction of nitrate and ferrous ion accompanied by a small amount of nitrogen gas. After 84 days of culture, the highest inversion of ammonia was 29.85 mg·L-1, the conversion rate of ammonia reached 59.7%, and the highest nitrate concentration of the reactor effluent was 24.56 mg·L-1. Feammox in activated sludge was a process that resulted in acid leading, which decreased the pH value. The structure of community bands changed during the whole incubation, some communities were retained and part of the dominant bacteria were enriched in the reaction of activated sludge. © 2016, Science Press. All right reserved.
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页码：3114 / 3119
页数：5
相关论文
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