作者
Yuxiang Zhao, Jiajie Hu, Weiling Yang, Jiaqi Wang, Zhongjun Jia, Ping Zheng, Baolan Hu
发表日期
2021/2/10
期刊
Science of the Total Environment
卷号
755
页码范围
142580
出版商
Elsevier
简介
The discovery of complete ammonia oxidizer (comammox) was a breakthrough in the study of nitrification. However, slow growth of comammox bacteria makes it challenging to distinguish them from traditional ammonia oxidizing microorganisms. Genomic data indicated that comammox bacteria encoded genes that can metabolize urea and had higher nitrite tolerance, which could only be found in several ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB). This implies that using nitrite and urea as nitrogen sources may accelerate comammox bacteria's enrichment efficiency. In this study, two reactors using nitrite and urea as substrates, respectively, were operated for 390 days. At the end of cultivation, the reactor fed with urea exhibited higher nitrification potential than the reactor fed with nitrite. Comammox bacteria outcompeted AOA and AOB, regardless of whether they were cultured with …
学术搜索中的文章
Y Zhao, J Hu, W Yang, J Wang, Z Jia, P Zheng, B Hu - Science of the Total Environment, 2021