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Nitrification kinetics, N(2)O emission, and energy use in intermittently aerated hybrid reactor under different organic loading rates

This study investigated the impact of intermittent aeration strategies and reduction in the reactor’s organic and nitrogen loading rates on the course of particular stages of the nitrification process, as well as energy consumption and N(2)O emissions in a hybrid reactor with nitrification/denitrifi...

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Autores principales: Zajac, O., Zubrowska-Sudol, M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9765392/
https://www.ncbi.nlm.nih.gov/pubmed/36567805
http://dx.doi.org/10.1007/s13762-022-04715-6
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author Zajac, O.
Zubrowska-Sudol, M.
author_facet Zajac, O.
Zubrowska-Sudol, M.
author_sort Zajac, O.
collection PubMed
description This study investigated the impact of intermittent aeration strategies and reduction in the reactor’s organic and nitrogen loading rates on the course of particular stages of the nitrification process, as well as energy consumption and N(2)O emissions in a hybrid reactor with nitrification/denitrification. Each of the analysed series revealed the greatest ammonia oxidation activity in activated sludge flocs. The highest activity of nitrite nitrogen oxidation was demonstrated in the case of biofilm. A reduction in the reactor’s organic and nitrogen loading rate value had a greater effect on changes in the activity of ammonia-oxidizing bacteria than nitrite-oxidizing bacteria. In a system where the operation of air pumps was controlled through switching them and off according to the adopted ratio between non-aerated and aerated sub-phase times and the assumed oxygen concentration, a reduction in the duration of aerated sub-phases caused no decrease in energy use for aeration. Lower N(2)O emission was recorded when the reactor operated with a longer duration of aerated sub-phases. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s13762-022-04715-6.
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spelling pubmed-97653922022-12-21 Nitrification kinetics, N(2)O emission, and energy use in intermittently aerated hybrid reactor under different organic loading rates Zajac, O. Zubrowska-Sudol, M. Int J Environ Sci Technol (Tehran) Original Paper This study investigated the impact of intermittent aeration strategies and reduction in the reactor’s organic and nitrogen loading rates on the course of particular stages of the nitrification process, as well as energy consumption and N(2)O emissions in a hybrid reactor with nitrification/denitrification. Each of the analysed series revealed the greatest ammonia oxidation activity in activated sludge flocs. The highest activity of nitrite nitrogen oxidation was demonstrated in the case of biofilm. A reduction in the reactor’s organic and nitrogen loading rate value had a greater effect on changes in the activity of ammonia-oxidizing bacteria than nitrite-oxidizing bacteria. In a system where the operation of air pumps was controlled through switching them and off according to the adopted ratio between non-aerated and aerated sub-phase times and the assumed oxygen concentration, a reduction in the duration of aerated sub-phases caused no decrease in energy use for aeration. Lower N(2)O emission was recorded when the reactor operated with a longer duration of aerated sub-phases. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s13762-022-04715-6. Springer Berlin Heidelberg 2022-12-20 /pmc/articles/PMC9765392/ /pubmed/36567805 http://dx.doi.org/10.1007/s13762-022-04715-6 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Original Paper
Zajac, O.
Zubrowska-Sudol, M.
Nitrification kinetics, N(2)O emission, and energy use in intermittently aerated hybrid reactor under different organic loading rates
title Nitrification kinetics, N(2)O emission, and energy use in intermittently aerated hybrid reactor under different organic loading rates
title_full Nitrification kinetics, N(2)O emission, and energy use in intermittently aerated hybrid reactor under different organic loading rates
title_fullStr Nitrification kinetics, N(2)O emission, and energy use in intermittently aerated hybrid reactor under different organic loading rates
title_full_unstemmed Nitrification kinetics, N(2)O emission, and energy use in intermittently aerated hybrid reactor under different organic loading rates
title_short Nitrification kinetics, N(2)O emission, and energy use in intermittently aerated hybrid reactor under different organic loading rates
title_sort nitrification kinetics, n(2)o emission, and energy use in intermittently aerated hybrid reactor under different organic loading rates
topic Original Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9765392/
https://www.ncbi.nlm.nih.gov/pubmed/36567805
http://dx.doi.org/10.1007/s13762-022-04715-6
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