Electron competition among nitrogen oxides reduction during methanol-utilizing denitrification in wastewater treatment

Yuting Pan; Bing-Jie Ni; Philip L. Bond; Liu Ye; Zhiguo Yuan

doi:10.1016/j.watres.2013.02.054

Electron competition among nitrogen oxides reduction during methanol-utilizing denitrification in wastewater treatment

Yuting Pan, Bing-Jie Ni, Philip L. Bond, Liu Ye, Zhiguo Yuan

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

258 Citations (Scopus)

Abstract

Limited availability of carbon sources has been regarded as an important factor leading to N₂O accumulation during denitrification in wastewater treatment. By varying the carbon (methanol) loading rate to a methanol utilizing denitrifying culture in the presence of various electron acceptors (nitrate, nitrite, N₂O and their combinations), this study quantitatively investigated the electron distribution among different nitrogen oxide reductases during denitrification. The results showed that electron competition occurs under not only carbon limiting but also carbon abundant conditions. The electron distribution among the nitrogen oxide reductases is affected by the carbon loading rate, with a lower fraction of electrons distributed to the N₂O reductase with reduced carbon loading rate. N₂O accumulation occurs when the electron flux going to nitrite reduction is higher than that going to N₂O reduction. The study also showed that, for the culture investigated, the carbon to nitrogen ratio is not a key factor leading to N₂O accumulation. © 2013 Elsevier Ltd.

Original language	English
Pages (from-to)	3273-3281
Journal	Water Research
Volume	47
Issue number	10
DOIs	https://doi.org/10.1016/j.watres.2013.02.054
Publication status	Published - 15 Jun 2013
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

Denitrification
Electron competition
Nitrous oxide

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "Electron competition among nitrogen oxides reduction during methanol-utilizing denitrification in wastewater treatment",

abstract = "Limited availability of carbon sources has been regarded as an important factor leading to N2O accumulation during denitrification in wastewater treatment. By varying the carbon (methanol) loading rate to a methanol utilizing denitrifying culture in the presence of various electron acceptors (nitrate, nitrite, N2O and their combinations), this study quantitatively investigated the electron distribution among different nitrogen oxide reductases during denitrification. The results showed that electron competition occurs under not only carbon limiting but also carbon abundant conditions. The electron distribution among the nitrogen oxide reductases is affected by the carbon loading rate, with a lower fraction of electrons distributed to the N2O reductase with reduced carbon loading rate. N2O accumulation occurs when the electron flux going to nitrite reduction is higher than that going to N2O reduction. The study also showed that, for the culture investigated, the carbon to nitrogen ratio is not a key factor leading to N2O accumulation. {\textcopyright} 2013 Elsevier Ltd.",

keywords = "Denitrification, Electron competition, Nitrous oxide",

author = "Yuting Pan and Bing-Jie Ni and Bond, {Philip L.} and Liu Ye and Zhiguo Yuan",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

year = "2013",

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doi = "10.1016/j.watres.2013.02.054",

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TY - JOUR

T1 - Electron competition among nitrogen oxides reduction during methanol-utilizing denitrification in wastewater treatment

AU - Pan, Yuting

AU - Ni, Bing-Jie

AU - Bond, Philip L.

AU - Ye, Liu

AU - Yuan, Zhiguo

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2013/6/15

Y1 - 2013/6/15

N2 - Limited availability of carbon sources has been regarded as an important factor leading to N2O accumulation during denitrification in wastewater treatment. By varying the carbon (methanol) loading rate to a methanol utilizing denitrifying culture in the presence of various electron acceptors (nitrate, nitrite, N2O and their combinations), this study quantitatively investigated the electron distribution among different nitrogen oxide reductases during denitrification. The results showed that electron competition occurs under not only carbon limiting but also carbon abundant conditions. The electron distribution among the nitrogen oxide reductases is affected by the carbon loading rate, with a lower fraction of electrons distributed to the N2O reductase with reduced carbon loading rate. N2O accumulation occurs when the electron flux going to nitrite reduction is higher than that going to N2O reduction. The study also showed that, for the culture investigated, the carbon to nitrogen ratio is not a key factor leading to N2O accumulation. © 2013 Elsevier Ltd.

AB - Limited availability of carbon sources has been regarded as an important factor leading to N2O accumulation during denitrification in wastewater treatment. By varying the carbon (methanol) loading rate to a methanol utilizing denitrifying culture in the presence of various electron acceptors (nitrate, nitrite, N2O and their combinations), this study quantitatively investigated the electron distribution among different nitrogen oxide reductases during denitrification. The results showed that electron competition occurs under not only carbon limiting but also carbon abundant conditions. The electron distribution among the nitrogen oxide reductases is affected by the carbon loading rate, with a lower fraction of electrons distributed to the N2O reductase with reduced carbon loading rate. N2O accumulation occurs when the electron flux going to nitrite reduction is higher than that going to N2O reduction. The study also showed that, for the culture investigated, the carbon to nitrogen ratio is not a key factor leading to N2O accumulation. © 2013 Elsevier Ltd.

KW - Denitrification

KW - Electron competition

KW - Nitrous oxide

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DO - 10.1016/j.watres.2013.02.054

M3 - RGC 21 - Publication in refereed journal

C2 - 23622815

SN - 0043-1354

VL - 47

SP - 3273

EP - 3281

JO - Water Research

JF - Water Research

IS - 10

ER -

Electron competition among nitrogen oxides reduction during methanol-utilizing denitrification in wastewater treatment

Abstract

Bibliographical note

Research Keywords

UN SDGs

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