Low nitrous oxide production in intermittent-feed high performance nitritating reactors

Qingxian Su; Malene M. Jensen; Barth F. Smets

Low nitrous oxide production in intermittent-feed high performance nitritating reactors

Qingxian Su, Malene M. Jensen, Barth F. Smets

Technical University of Denmark

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Abstract

Nitrous oxide (N₂O) production from autotrophic nitrogen removal processes, especially nitritating systems, is of growing concern. N₂O dynamics were characterized and N₂O production factors were quantified in two lab-scale intermittent-feed nitritating SBRs. 93 ± 14% of the oxidized ammonium was converted to nitrite, with the average total net N₂O production of 2.1 ± 0.7% of the ammonium oxidized. Operation with intermittent feeding appears an effective optimization approach to mitigate N₂O emissions from nitritating systems. Net N₂O production rates transiently increased with a rise in pH after each feeding, indicating a potential role of pH in N₂O production.

Original language	English
Publication date	2017
Number of pages	1
Publication status	Published - 2017
Event	Frontiers International Conference on Wastewater Treatment (FICWTM2017): FICWTM 2017 - Palermo, Italy Duration: 21 May 2017 → 24 May 2017 http://www.ficwtmod2017.it/conference/

Conference

Conference	Frontiers International Conference on Wastewater Treatment (FICWTM2017)
Country/Territory	Italy
City	Palermo
Period	21/05/2017 → 24/05/2017
Internet address	http://www.ficwtmod2017.it/conference/

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title = "Low nitrous oxide production in intermittent-feed high performance nitritating reactors",

abstract = "Nitrous oxide (N2O) production from autotrophic nitrogen removal processes, especially nitritating systems, is of growing concern. N2O dynamics were characterized and N2O production factors were quantified in two lab-scale intermittent-feed nitritating SBRs. 93 ± 14% of the oxidized ammonium was converted to nitrite, with the average total net N2O production of 2.1 ± 0.7% of the ammonium oxidized. Operation with intermittent feeding appears an effective optimization approach to mitigate N2O emissions from nitritating systems. Net N2O production rates transiently increased with a rise in pH after each feeding, indicating a potential role of pH in N2O production.",

author = "Qingxian Su and Jensen, {Malene M.} and Smets, {Barth F.}",

year = "2017",

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TY - ABST

T1 - Low nitrous oxide production in intermittent-feed high performance nitritating reactors

AU - Su, Qingxian

AU - Jensen, Malene M.

AU - Smets, Barth F.

PY - 2017

Y1 - 2017

N2 - Nitrous oxide (N2O) production from autotrophic nitrogen removal processes, especially nitritating systems, is of growing concern. N2O dynamics were characterized and N2O production factors were quantified in two lab-scale intermittent-feed nitritating SBRs. 93 ± 14% of the oxidized ammonium was converted to nitrite, with the average total net N2O production of 2.1 ± 0.7% of the ammonium oxidized. Operation with intermittent feeding appears an effective optimization approach to mitigate N2O emissions from nitritating systems. Net N2O production rates transiently increased with a rise in pH after each feeding, indicating a potential role of pH in N2O production.

AB - Nitrous oxide (N2O) production from autotrophic nitrogen removal processes, especially nitritating systems, is of growing concern. N2O dynamics were characterized and N2O production factors were quantified in two lab-scale intermittent-feed nitritating SBRs. 93 ± 14% of the oxidized ammonium was converted to nitrite, with the average total net N2O production of 2.1 ± 0.7% of the ammonium oxidized. Operation with intermittent feeding appears an effective optimization approach to mitigate N2O emissions from nitritating systems. Net N2O production rates transiently increased with a rise in pH after each feeding, indicating a potential role of pH in N2O production.

M3 - Conference abstract for conference

T2 - Frontiers International Conference on Wastewater Treatment (FICWTM2017)

Y2 - 21 May 2017 through 24 May 2017

ER -

Low nitrous oxide production in intermittent-feed high performance nitritating reactors

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