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Autotrophic Denitrification Using Elemental Sulfur to Remove Nitrate from Saline Aquarium Waters.

Simard, Maire-Christine; Masson, Stéphane; Mercier, Guy; Benmoussa, Hamel; Blais, Jean-François; Coudert, Lucie (2015). Autotrophic Denitrification Using Elemental Sulfur to Remove Nitrate from Saline Aquarium Waters. Journal of Environmental Engineering , vol. 141 , nº 12. 04015037. DOI: 10.1061/(ASCE)EE.1943-7870.0000977.

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Résumé

The goal of this research was to elaborate an effective and economical treatment system to eliminate nitrates from a large marine basin at the Aquarium du Québec. Several configurations of an autotrophic denitrification system using elemental sulfur were tested. Results showed that inoculums taken from various environments (soil, sewage sludge, wetland, pig manure, marine sediment) could be used to prepare denitrifying microbial cultures for a marine environment. Subsequent trials using a continuous-flow configuration with columns containing sulfur granules showed that a hydraulic retention time (HRT) of 16–19 h allowed the removal of nearly all of the nitrates present in the water ([NO₃-N]ᵢ =25–30  mg L⁻¹). Furthermore, this study demonstrated that the insertion of oyster shell columns between the sulfur-containing columns led to an increase in pH and alkalinity of the treated water, maintaining a favorable denitrifying environment.

Type de document: Article
Mots-clés libres: denitrification; aquarium water; elemental sulfur; autotroph; oyster shell; nitrate; alkalinity
Centre: Centre Eau Terre Environnement
Date de dépôt: 23 avr. 2018 20:08
Dernière modification: 23 avr. 2018 20:08
URI: http://espace.inrs.ca/id/eprint/3938

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