Results 81 to 90 of about 163 (120)

Copper availability controls niche differentiation between comammox Nitrospira and ammonia-oxidizing bacteria

ISME Communications
Abstract The biological oxidation of ammonia, the first step of nitrification, is central to biological water purification processes for nitrogen removal. For drinking water treatment, particularly sourced from groundwater, low concentrations of available copper often limit the efficiency of nitrification.
Kazuyoshi Koike, Garrett J Smith, Nao Okuda, Ryoma Konno, Shizuka Watanabe, Yoshihito Kusunoki, Shuji Kawakami, Theo A van Alen, Maartje A H J van Kessel, Ryoko Yamamoto-Ikemoto, Sebastian Lücker, Norihisa Matsuura   +11 more
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Metatranscriptomic analysis reveals synergistic activities of comammox and anammox bacteria in full-scale attached growth nitrogen removal system

Environmental Science & Technology
0- Abstract Leveraging comammox Nitrospira and anammox bacteria for shortcut nitrogen removal can drastically lower the carbon footprint of wastewater treatment facilities by decreasing aeration energy, carbon, alkalinity, and tank volume requirements while also ...
Juliet Johnston, Katherine Vilardi, Irmarie Cotto, Ashwin Sudarshan, Kaiqin Bian, Stephanie Klaus, Megan Bachmann, Mike Parsons, Christopher Wilson, Charles Bott, Ameet Pinto   +10 more
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Arbuscular mycorrhiza suppresses microbial abundance, and particularly that of ammonia oxidizing bacteria, in agricultural soils

Frontiers in Microbiology
Interactions between arbuscular mycorrhizal (AM) fungi and ammonia-oxidizing (AO) microorganisms, two important microbial guilds contributing to soil-plant mineral nutrient cycling, are complex, given the high variability of soil biological, physical ...
Daquan Sun, Petr Šmilauer, Petra Pjevac, Martin Rozmoš, Sándor T. Forczek, Michala Kotianová, Hana Hršelová, Petra Bukovská, Jan Jansa   +8 more
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The long-term effects of using nitrite and urea on the enrichment of comammox bacteria

Science of the Total Environment, 2021
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 ...
Zhongjun Jia, Hu Baolan, Jiajie Hu
exaly   +3 more sources

Diversity and abundance of comammox bacteria in the sediments of an urban lake [PDF]

Journal of Applied Microbiology, 2020
Although comammox have been discovered in a variety of ecosystems, there are few studies in urban lakes. This paper attempted to confirm whether this ammonia-oxidizing microbe exists in urban lakes and to determine the factors influencing its existence.This study investigated the diversity and abundance of comammox bacteria in sediments of a typical ...
Jianwei Zhao
exaly   +4 more sources

Biogeographic distribution of comammox bacteria in diverse terrestrial habitats

Science of the Total Environment, 2020
Comammox, the microbial group capable of completely oxidizing ammonia to nitrate, challenged the traditional two-step nitrification process where ammonia is oxidized by ammonia-oxidizing archaea (AOA) and bacteria (AOB), and nitrite by nitrite-oxidizing bacteria (NOB).
Guibing Zhu, Yao Shi
exaly   +3 more sources

Comammox bacteria predominate among ammonia-oxidizing microorganisms in municipal but not in refinery wastewater treatment plants

Journal of Environmental Management, 2022
Comammox bacteria have proved to be one dominant and significant ammonia-oxidizing microorganisms (AOMs) in municipal wastewater treatment plants (WWTPs), however, it still remains unknown about their abundance and diversity in industrial WWTPs. In this study, activated sludge samples from 8 municipal WWTPs and 6 industrial WWTPs treating refinery ...
MAOSHENG Zheng, Shishi He, Zhirong Zhao   +2 more
exaly   +3 more sources

Effects of dam building on the occurrence and activity of comammox bacteria in river sediments and their contribution to nitrification

Science of The Total Environment, 2022
The recent discovery of complete ammonia oxidizers (comammox) has fundamentally changed our understanding of nitrification. However, studies on the occurrence and activity of comammox bacteria and their contribution to nitrification remain unclear. Here, we investigated the abundance, activity, and diversity of comammox bacteria and their contribution ...
Yuantao, Wang, Shenghua, Zhang, Huixia, Jin, Jiwei, Chen, Ketao, Zhou, Jinxi, Chen, Jinfang, Chen, Guibing, Zhu   +7 more
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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
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The abundance of comammox bacteria was higher than that of ammonia-oxidizing archaea and bacteria in rhizosphere of emergent macrophytes in a typical shallow lake riparian

International Microbiology, 2023
Complete ammonia oxidation (comammox) bacteria can complete the whole nitrification process independently, which not only challenges the classical two-step nitrification theory but also updates long-held perspective of microbial ecological relationship in nitrification process.
Yuchun Wang, Mingming Hu, Jianwei Zhao   +2 more
exaly   +3 more sources