Results 171 to 180 of about 2,030 (196)

Competitive enrichment of comammox Nitrospira in floccular sludge

Water Research
The discovery of complete ammonium oxidation (comammox) has subverted the traditional perception of two-step nitrification, which plays a key role in achieving biological nitrogen removal from wastewater. Floccular sludge-based treatment technologies are being applied at the majority of wastewater treatment plants in service where detection of various ...
Bing-Jie Ni, Xueming Chen, Min Zheng
exaly   +3 more sources

Abundance, diversity and physiological preferences of comammox Nitrospira in urban groundwater

Science of The Total Environment, 2023
Complete ammonia oxidizer (comammox Nitrospira), catalyze complete nitrification process in a single organism, are frequently detected in groundwater ecosystem. However, the ecological niches and environmental driving factors of comammox Nitrospira in urban groundwater are largely unknown.
Xiufeng, Tang, Ye, Li, Min, Liu, Lijun, Hou, Ping, Han   +4 more
openaire   +2 more sources

Niche specialization of comammox Nitrospira clade A in terrestrial ecosystems

Soil Biology and Biochemistry, 2021
Abstract Comammox Nitrospira are a newly discovered group of nitrifying prokaryotes and might be key contributors to nitrogen cycling in terrestrial ecosystems. Their large-scale distribution patterns and the dominant environmental factors shaping their ecological niches are not yet well documented.
Chaoyu Li, Hang-Wei Hu, Qing-Lin Chen, Zhen-Zhen Yan, Bao-Anh Thi Nguyen, Deli Chen, Ji-Zheng He   +6 more
openaire   +2 more sources

Comammox bacterial abundance, activity, and contribution in agricultural rhizosphere soils

Science of The Total Environment, 2020
The newly identified complete ammonia oxidation (comammox), which is capable of oxidizing ammonia directly to nitrate, has complemented our knowledge of nitrification in the global nitrogen (N) cycle. However, understanding the contribution and ecological roles of comammox in complex soil environments is still in its infancy.
Xiaomin Wang, Shanyun Wang, Yingying Jiang, Jiemin Zhou, Chang Han, Guibing Zhu   +5 more
openaire   +2 more sources

Specific Micropollutant Biotransformation Pattern by the Comammox Bacterium Nitrospira inopinata

Environmental Science & Technology, 2019
The recently discovered complete ammonia-oxidizing (comammox) bacteria occur in various environments, including wastewater treatment plants. To better understand their role in micropollutant biotransformation in comparison with ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA), we investigated the biotransformation capability of ...
Ping Han, Yaochun Yu, Lijun Zhou, Zhenyu Tian, Zhong Li, Lijun Hou, Min Liu, Qinglong Wu, Michael Wagner, Yujie Men   +9 more
openaire   +4 more sources

Comammox biogeography subject to anthropogenic interferences along a high-altitude river

Water Research, 2022
The recent discovery of comammox Nitrospira performing complete ammonia oxidation to nitrate has overturned the long-held dogma of two-step nitrification on Earth, yet little is known about the effect of urbanization interference on their distribution.
Shufeng Liu, Hetong Cai, Xiaohui Zhao, Zongzhi Wu, Qian Chen, Xuming Xu, Sining Zhong, Weiling Sun, Jinren Ni   +8 more
openaire   +2 more sources

Predominance of comammox bacteria among ammonia oxidizers under low dissolved oxygen condition

Chemosphere, 2022
Although low-oxygen nitrification can significantly cut down the aeration demand in wastewater treatment plants, little is known about the community dynamics of relevant microorganisms under different oxygen concentrations. Here, by conducting a series of bioreactors with oxygen concentrations of 0%, 2%, 5%, 10%, 20%, 40%, and 70%, we provided a ...
Maosheng Zheng, Guangli Mu, Anqi Zhang, Jiawen Wang, Fang Chang, Junfeng Niu, Xinwei Wang, Tian Gao, Zhirong Zhao   +8 more
openaire   +2 more sources

The environmental detection of comammox Nitrospira

2017
Vor kurzem wurden die ersten Mikroorganismen entdeckt, die in der Lage sind Ammonium komplett zu Nitrat zu oxidieren (‘comammox’), und dadurch das Dogma, über die Arbeitsteilung in der Nitrifikation in zwei aufeinanderfolgenden Schritten, für ungültig erklärt.
openaire   +1 more source

[Research progress on primers and molecular ecology of comammox Nitrospira].

Ying yong sheng tai xue bao = The journal of applied ecology, 2021
Nitrification is a key process in nitrogen cycling, which has received considerable attention in the research field of soil biochemistry. In 2015, the discovery of complete ammonia oxidizers (Comammox) challenged conventional two-step nitrification perspective, which represented a paradigm shift in the understanding of soil nitrogen cycling.
Fu-Yun, Gao, Ya-Ying, Li, Huai-Ying, Yao
openaire   +1 more source

Comammox and AOA responses to ammonia loading rate in oligotrophic environments

Water Research
Nitrification is a central process in the global nitrogen cycle, yet the ecological niches and growth strategies of ammonia-oxidizing microorganisms in oligotrophic environments remain poorly understood. To investigate the ecological responses of complete ammonia oxidizers (Comammox) and ammonia-oxidizing archaea (AOA), a membrane bioreactor (MBR ...
Run, Su, Litong, Shi, Yan, Wei, Bin, Ma
openaire   +2 more sources