Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Zhu, Jing, Xu, Xingkun, Yuan, Mengdong, Wu, Hanghang, Ma, Zhuang, Wu, Weixiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2017
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
_version_ 1783244163535339520
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
work_keys_str_mv AT zhujing optimumo2ch4ratiopromotesthesynergybetweenaerobicmethanotrophsanddenitrifierstoenhancenitrogenremoval
AT xuxingkun optimumo2ch4ratiopromotesthesynergybetweenaerobicmethanotrophsanddenitrifierstoenhancenitrogenremoval
AT yuanmengdong optimumo2ch4ratiopromotesthesynergybetweenaerobicmethanotrophsanddenitrifierstoenhancenitrogenremoval
AT wuhanghang optimumo2ch4ratiopromotesthesynergybetweenaerobicmethanotrophsanddenitrifierstoenhancenitrogenremoval
AT mazhuang optimumo2ch4ratiopromotesthesynergybetweenaerobicmethanotrophsanddenitrifierstoenhancenitrogenremoval
AT wuweixiang optimumo2ch4ratiopromotesthesynergybetweenaerobicmethanotrophsanddenitrifierstoenhancenitrogenremoval