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Article Dans Une Revue Science of the Total Environment Année : 2020

French vertical flow treatment wetlands in a subtropical climate: Characterization of the organic deposit layer and comparison with systems in France

Résumé

This paper presents an advanced characterization of the organic fraction of the top deposit layer collected in a French vertical flow treatment wetland (first stage) in operation in Brazil (two units with different organic deposit layer accumulation times), and compares the results with those obtained from studies in France. The organic and inorganic constituents of the samples collected were analysed by biological, chemical and thermochemical methods. The unit with the organic deposit with longer accumulation time (almost 10 years) was characterized as amature one (organicmatter - OM: 51.3 and 52.7%, thermal index - R-TGA: 0.79and 0.85, humification index - HI: 0.61 and 1.16, respectively for the depths of 0-5 cm and 5-10 cm). The unit with the deposit organic with less than three years of accumulation also presented characteristics of a mature deposit (OM: 61.2%, R-TGA: 0.79, HI: 1.01 for the depth of 0-5 cm), indicating a rapid mineralization of the deposit under the existing subtropical environment. Despite several differences in term of conception, hydraulic and mass loading rates and accumulation rates, the characteristics of the OM of Brazilian deposits were found to be quite similar to the French ones. (C) 2020 Elsevier B.V. All rights reserved.
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Dates et versions

hal-02895284 , version 1 (09-07-2020)

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Camila Maria Trein, Camille Banc, Kévin Maciejewski, Amanda de Moraes Motta, Rémy Gourdon, et al.. French vertical flow treatment wetlands in a subtropical climate: Characterization of the organic deposit layer and comparison with systems in France. Science of the Total Environment, 2020, 742, pp.140608. ⟨10.1016/j.scitotenv.2020.140608⟩. ⟨hal-02895284⟩
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