La production de nitrites lors de la dénitrification des eaux usées par biofiltration - Stratégie de contrôle et de réduction des concentrations résiduelles

Abstract : The recent popularity of post-denitrification processes in the greater Paris area wastewater treatmentplants has caused a resurgence of the presence of nitrite in the Seine River. Controlling the productionof nitrite during the post-denitrification process has thus become a major technical issue. Researchstudies have been led in the MOCOPEE program (www.mocopee.com) to better understand theunderlying mechanisms behind the production of nitrite during wastewater denitrification and todevelop technical tools (measurement and control solutions) to assist on-site reductions of nitriteproduction. Prior studies have shown that typical methanol dosage strategies produce a varyingcarbon-to-nitrogen ratio in the reactor, which in turn leads to unstable nitrite concentrations in theeffluent. The possibility of adding a model-free control to the actual classical dosage strategy has thusbeen tested on the SimBio model, which simulates the behavior of wastewater biofilters. Thecorresponding “intelligent” feedback loop, which is using effluent nitrite concentrations, compensatesthe classical strategy only when needed. Simulation results show a clear improvement in averagenitrite concentration level and level stability in the effluent, without a notable overcost in methanol.
Complete list of metadatas

Cited literature [11 references]  Display  Hide  Download

https://hal-polytechnique.archives-ouvertes.fr/hal-01640983
Contributor : Michel Fliess <>
Submitted on : Monday, November 20, 2017 - 8:55:55 PM
Last modification on : Wednesday, March 27, 2019 - 4:41:28 PM
Long-term archiving on : Wednesday, February 21, 2018 - 1:50:40 PM

File

Denitrif_RevSciEau.pdf
Files produced by the author(s)

Identifiers

Citation

Vincent Rocher, Cédric Join, Stéphane Mottelet, Jean Bernier, Sabrina Rechdaoui-Guérin, et al.. La production de nitrites lors de la dénitrification des eaux usées par biofiltration - Stratégie de contrôle et de réduction des concentrations résiduelles. Journal of Water Science / Revue des Sciences de l'Eau, Lavoisier (Hermes Science Publications), 2018, 31 (1), pp.61-73. ⟨10.7202/1047053ar⟩. ⟨hal-01640983⟩

Share

Metrics

Record views

1053

Files downloads

1081