The Contribution of Autotrophic Nitrogen Oxidizers to Global Nitrogen Conversion
The accumulation of ammonium (NH4+-N) and nitrous oxide (N2O-N) in the environment is causing concern due to their ecological impacts and contribution to global warming. Autotrophic nitrogen oxidizers, including aerobic ammonium-oxidizing archaea and bacteria, anaerobic ammonium oxidizer and nitrite...
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| Autores principales: | , , |
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| Formato: | Capítulo de libro |
| Lenguaje: | inglés |
| Publicado: |
IntechOpen
2023
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| Materias: | |
| Acceso en línea: | https://www.intechopen.com/chapters/88017 |
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| Sumario: | The accumulation of ammonium (NH4+-N) and nitrous oxide (N2O-N) in the environment is causing concern due to their ecological impacts and contribution to global warming. Autotrophic nitrogen oxidizers, including aerobic ammonium-oxidizing archaea and bacteria, anaerobic ammonium oxidizer and nitrite oxidizers, play a crucial role in the nitrogen cycle by facilitating the removal of nitrogenous residues from the environment. Nitrogen oxides (NOx) like nitrite (NO2−-N) and nitrate (NO3−-N) are produced as key immediate products during the conversion of NH4+-N or N2O-N. Additionally, these autotrophic microbes utilize carbon dioxide (CO2) for cell synthesis, thereby mitigating the greenhouse effect. Preliminary results pointed out that nitrogen oxidizers could effectively remove NH4+-N and NOx from sewage and wastewater systems at the loading rate lower than 0.5 kg N/m3-day. Moreover, this family could also reduce the greenhouse N2O-N through oxidizing pathway, attaining the maximum reduction of 25.2-fold the annual N2O production. |
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| ISBN: | 978-1-83768-963-7 |
| DOI: | 10.5772/intechopen.112709 |