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Influences of granule properties on the performance of autotrophic nitrogen removal granular reactor: A model-based evaluation.
- Source :
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Bioresource technology [Bioresour Technol] 2022 Jul; Vol. 356, pp. 127307. Date of Electronic Publication: 2022 May 12. - Publication Year :
- 2022
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Abstract
- This work studied the impacts of key granule properties on the granular reactor performing partial nitritation/anammox from the modeling perspective. The results could guide not only future reliable modeling but also practical startup/operation of the reactor. To achieve high total nitrogen (TN) removal whilst avoiding significant N <subscript>2</subscript> O production, inoculated granules should be big and anammox-enriched. The optimum boundary layer thickness for maximum TN removal increased with the decreasing diffusivity of soluble components in the granule structure. Even though a thick boundary layer could protect anammox bacteria from elevated dissolved oxygen (DO) (e.g., 0.5 g-O <subscript>2</subscript> /m <superscript>3</superscript> ) and obtain high TN removal (>90.0%) and low N <subscript>2</subscript> O production (<1.8%), even complete removal of the boundary layer would fail to provide sufficient substrate for anammox and therefore couldn't increase TN removal to 90.0% and decrease N <subscript>2</subscript> O production to <2.4% at insufficient DO (e.g., 0.3 g-O <subscript>2</subscript> /m <superscript>3</superscript> in the presence of lifted influent NH <subscript>4</subscript> <superscript>+</superscript> concentration).<br /> (Copyright © 2022 Elsevier Ltd. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 356
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 35569712
- Full Text :
- https://doi.org/10.1016/j.biortech.2022.127307