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Updated: Nov 17, 2025

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
Published on: December 25, 2015
Effects of operating conditions on microbial consortium of the heterotrophic ammonia oxidation process
Zhikai Yin1, Xiaolong Yang1, Xingyu Wang1
1Department of Environmental Science and Engineering, Fudan University, 2005 Songhu Road, Shanghai 200433, PR China.
Abstract:
This study aimed to investigate the ammonia removal by the consortium mainly comprising of ammonia-oxidizing bacteria under different initial pH, temperatures and stress of heavy metals. The results showed that the consortium exhibited a strong adaptation for broad pH ranging from 5 to 9. When the temperature dropped to 15℃, its ammonium removal and nitrate accumulation rates decreased by 72.23% and 95.12%, respectively. Meanwhile, the temperature correction coefficients of the ammonium removal and nitrate accumulation rates reached the maximum. In addition, the consortium could survive in the solutions containing 0-1.0 mg·L-1 Cu2+ and 0-5.0 mg·L-1 Fe3+. Moreover, the inhibition of free nitrous acid (FNA) against nitrite oxidation activity was found to be much more significant than that low-temperature treatment. Microbial diversity analysis showed that the bacterial community structure was shift significantly by the temperature drop, especially change the abundance of Nitrosomonas, Paracoccus, Pseudomonas and Nitrospirae.
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