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Optimum O(2):CH(4) Ratio Promotes the Synergy between Aerobic Methanotrophs and Denitrifiers to Enhance Nitrogen Removal
The O(2):CH(4) ratio significantly effects nitrogen removal in mixed cultures where aerobic methane oxidation is coupled with denitrification (AME-D). The goal of this study was to investigate nitrogen removal of the AME-D process at four different O(2):CH(4) ratios [0, 0.05, 0.25, and 1 (v/v)]. In...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5472701/ https://www.ncbi.nlm.nih.gov/pubmed/28670305 http://dx.doi.org/10.3389/fmicb.2017.01112 |
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author | Zhu, Jing Xu, Xingkun Yuan, Mengdong Wu, Hanghang Ma, Zhuang Wu, Weixiang |
author_facet | Zhu, Jing Xu, Xingkun Yuan, Mengdong Wu, Hanghang Ma, Zhuang Wu, Weixiang |
author_sort | Zhu, Jing |
collection | PubMed |
description | The O(2):CH(4) ratio significantly effects nitrogen removal in mixed cultures where aerobic methane oxidation is coupled with denitrification (AME-D). The goal of this study was to investigate nitrogen removal of the AME-D process at four different O(2):CH(4) ratios [0, 0.05, 0.25, and 1 (v/v)]. In batch tests, the highest denitrifying activity was observed when the O(2):CH(4) ratio was 0.25. At this ratio, the methanotrophs produced sufficient carbon sources for denitrifiers and the oxygen level did not inhibit nitrite removal. The results indicated that the synergy between methanotrophs and denitrifiers was significantly improved, thereby achieving a greater capacity of nitrogen removal. Based on thermodynamic and chemical analyses, methanol, butyrate, and formaldehyde could be the main trophic links of AME-D process in our study. Our research provides valuable information for improving the practical application of the AME-D systems. |
format | Online Article Text |
id | pubmed-5472701 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-54727012017-06-30 Optimum O(2):CH(4) Ratio Promotes the Synergy between Aerobic Methanotrophs and Denitrifiers to Enhance Nitrogen Removal Zhu, Jing Xu, Xingkun Yuan, Mengdong Wu, Hanghang Ma, Zhuang Wu, Weixiang Front Microbiol Microbiology The O(2):CH(4) ratio significantly effects nitrogen removal in mixed cultures where aerobic methane oxidation is coupled with denitrification (AME-D). The goal of this study was to investigate nitrogen removal of the AME-D process at four different O(2):CH(4) ratios [0, 0.05, 0.25, and 1 (v/v)]. In batch tests, the highest denitrifying activity was observed when the O(2):CH(4) ratio was 0.25. At this ratio, the methanotrophs produced sufficient carbon sources for denitrifiers and the oxygen level did not inhibit nitrite removal. The results indicated that the synergy between methanotrophs and denitrifiers was significantly improved, thereby achieving a greater capacity of nitrogen removal. Based on thermodynamic and chemical analyses, methanol, butyrate, and formaldehyde could be the main trophic links of AME-D process in our study. Our research provides valuable information for improving the practical application of the AME-D systems. Frontiers Media S.A. 2017-06-16 /pmc/articles/PMC5472701/ /pubmed/28670305 http://dx.doi.org/10.3389/fmicb.2017.01112 Text en Copyright © 2017 Zhu, Xu, Yuan, Wu, Ma and Wu. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Microbiology Zhu, Jing Xu, Xingkun Yuan, Mengdong Wu, Hanghang Ma, Zhuang Wu, Weixiang Optimum O(2):CH(4) Ratio Promotes the Synergy between Aerobic Methanotrophs and Denitrifiers to Enhance Nitrogen Removal |
title | Optimum O(2):CH(4) Ratio Promotes the Synergy between Aerobic Methanotrophs and Denitrifiers to Enhance Nitrogen Removal |
title_full | Optimum O(2):CH(4) Ratio Promotes the Synergy between Aerobic Methanotrophs and Denitrifiers to Enhance Nitrogen Removal |
title_fullStr | Optimum O(2):CH(4) Ratio Promotes the Synergy between Aerobic Methanotrophs and Denitrifiers to Enhance Nitrogen Removal |
title_full_unstemmed | Optimum O(2):CH(4) Ratio Promotes the Synergy between Aerobic Methanotrophs and Denitrifiers to Enhance Nitrogen Removal |
title_short | Optimum O(2):CH(4) Ratio Promotes the Synergy between Aerobic Methanotrophs and Denitrifiers to Enhance Nitrogen Removal |
title_sort | optimum o(2):ch(4) ratio promotes the synergy between aerobic methanotrophs and denitrifiers to enhance nitrogen removal |
topic | Microbiology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5472701/ https://www.ncbi.nlm.nih.gov/pubmed/28670305 http://dx.doi.org/10.3389/fmicb.2017.01112 |
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