The effect of poly-β-hydroxyalkanoates degradation rate on nitrous oxide production in a denitrifying phosphorus removal system

Yan Wei; Shuying Wang; Bin Ma; Xiyao Li; Zhiguo Yuan; Yuelan He; Yongzhen Peng

doi:10.1016/j.biortech.2014.06.012

The effect of poly-β-hydroxyalkanoates degradation rate on nitrous oxide production in a denitrifying phosphorus removal system

Yan Wei
, Shuying Wang
, Bin Ma
, Xiyao Li
, Zhiguo Yuan
, Yuelan He
, Yongzhen Peng

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

35 Citations (Scopus)

Abstract

Poly-β-hydroxyalkanoates (PHAs) and free nitrous acid (FNA) have been revealed as significant factors causing nitrous oxide (N₂O) production in denitrifying phosphorus removal systems. In this study, the effect of PHA degradation rate on N₂O production was studied at low FNA levels. N₂O production always maintained at approximately 40% of the amount of nitrite reduced independent of the PHA degradation rate. The electrons distributed to nitrite reduction were 1.6 times that to N₂O reduction. This indicated that electron competition between these two steps was not affected by the PHA degradation rate. Continuous feed of nitrate was proposed, and demonstrated to reduce N₂O accumulation by 75%. While being kept low, a possible compounding effect of a low-level FNA could not be ruled out. The sludge used likely contained both polyphosphate- and glycogen-accumulating organisms, and the results could not be simply attributed to either group of organisms. © 2014 Elsevier Ltd.

Original language	English
Pages (from-to)	175-182
Journal	Bioresource Technology
Volume	170
DOIs	https://doi.org/10.1016/j.biortech.2014.06.012
Publication status	Published - Oct 2014
Externally published	Yes

Bibliographical 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].

UN SDGs

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

SDG 14 Life Below Water

Research Keywords

Denitrifying phosphorus removal
Nitrite
Poly-β-hydroxyalkanoates (PHAs)

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10.1016/j.biortech.2014.06.012

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title = "The effect of poly-β-hydroxyalkanoates degradation rate on nitrous oxide production in a denitrifying phosphorus removal system",

abstract = "Poly-β-hydroxyalkanoates (PHAs) and free nitrous acid (FNA) have been revealed as significant factors causing nitrous oxide (N2O) production in denitrifying phosphorus removal systems. In this study, the effect of PHA degradation rate on N2O production was studied at low FNA levels. N2O production always maintained at approximately 40\% of the amount of nitrite reduced independent of the PHA degradation rate. The electrons distributed to nitrite reduction were 1.6 times that to N2O reduction. This indicated that electron competition between these two steps was not affected by the PHA degradation rate. Continuous feed of nitrate was proposed, and demonstrated to reduce N2O accumulation by 75\%. While being kept low, a possible compounding effect of a low-level FNA could not be ruled out. The sludge used likely contained both polyphosphate- and glycogen-accumulating organisms, and the results could not be simply attributed to either group of organisms. {\textcopyright} 2014 Elsevier Ltd.",

keywords = "Denitrifying phosphorus removal, Nitrite, Poly-β-hydroxyalkanoates (PHAs)",

author = "Yan Wei and Shuying Wang and Bin Ma and Xiyao Li and Zhiguo Yuan and Yuelan He and Yongzhen Peng",

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 = "2014",

month = oct,

doi = "10.1016/j.biortech.2014.06.012",

language = "English",

volume = "170",

pages = "175--182",

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TY - JOUR

T1 - The effect of poly-β-hydroxyalkanoates degradation rate on nitrous oxide production in a denitrifying phosphorus removal system

AU - Wei, Yan

AU - Wang, Shuying

AU - Ma, Bin

AU - Li, Xiyao

AU - Yuan, Zhiguo

AU - He, Yuelan

AU - Peng, Yongzhen

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 - 2014/10

Y1 - 2014/10

N2 - Poly-β-hydroxyalkanoates (PHAs) and free nitrous acid (FNA) have been revealed as significant factors causing nitrous oxide (N2O) production in denitrifying phosphorus removal systems. In this study, the effect of PHA degradation rate on N2O production was studied at low FNA levels. N2O production always maintained at approximately 40% of the amount of nitrite reduced independent of the PHA degradation rate. The electrons distributed to nitrite reduction were 1.6 times that to N2O reduction. This indicated that electron competition between these two steps was not affected by the PHA degradation rate. Continuous feed of nitrate was proposed, and demonstrated to reduce N2O accumulation by 75%. While being kept low, a possible compounding effect of a low-level FNA could not be ruled out. The sludge used likely contained both polyphosphate- and glycogen-accumulating organisms, and the results could not be simply attributed to either group of organisms. © 2014 Elsevier Ltd.

AB - Poly-β-hydroxyalkanoates (PHAs) and free nitrous acid (FNA) have been revealed as significant factors causing nitrous oxide (N2O) production in denitrifying phosphorus removal systems. In this study, the effect of PHA degradation rate on N2O production was studied at low FNA levels. N2O production always maintained at approximately 40% of the amount of nitrite reduced independent of the PHA degradation rate. The electrons distributed to nitrite reduction were 1.6 times that to N2O reduction. This indicated that electron competition between these two steps was not affected by the PHA degradation rate. Continuous feed of nitrate was proposed, and demonstrated to reduce N2O accumulation by 75%. While being kept low, a possible compounding effect of a low-level FNA could not be ruled out. The sludge used likely contained both polyphosphate- and glycogen-accumulating organisms, and the results could not be simply attributed to either group of organisms. © 2014 Elsevier Ltd.

KW - Denitrifying phosphorus removal

KW - Nitrite

KW - Poly-β-hydroxyalkanoates (PHAs)

UR - https://www.scopus.com/pages/publications/84906048474

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84906048474&origin=recordpage

U2 - 10.1016/j.biortech.2014.06.012

DO - 10.1016/j.biortech.2014.06.012

M3 - RGC 21 - Publication in refereed journal

C2 - 25129233

SN - 0960-8524

VL - 170

SP - 175

EP - 182

JO - Bioresource Technology

JF - Bioresource Technology

ER -

The effect of poly-β-hydroxyalkanoates degradation rate on nitrous oxide production in a denitrifying phosphorus removal system

Abstract

Bibliographical note

UN SDGs

Research Keywords

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