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

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

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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 languageEnglish
    Publication date2017
    Number of pages1
    Publication statusPublished - 2017
    EventFrontiers International Conference on Wastewater Treatment (FICWTM2017): FICWTM 2017 - Palermo, Italy
    Duration: 21 May 201724 May 2017
    http://www.ficwtmod2017.it/conference/

    Conference

    ConferenceFrontiers International Conference on Wastewater Treatment (FICWTM2017)
    Country/TerritoryItaly
    CityPalermo
    Period21/05/201724/05/2017
    Internet address

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