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Fonctionnement dégradé de la station d'épuration Seine Aval (Yvelines) du 3 au 5 juillet 2019 suite à l’incendie de l’unité de clarifloculation - Analyse de l’impact environnemental de l’événement sur la Seine

Abstract : On Wednesday, July 3, 2019, at around 4:45 p.m., a fire broke out on the clarification unit of the Seine Aval wastewater treatment plant of the SIAAP (Yvelines, France). The treatment performance was temporarily degraded for 3 days; involving a significant supply of organic matter and nutrients to the natural environment. These inputs led to a strong deoxygenation of the Seine River up to 30 km downstream of the wastewater treatment plant discharge point : an estimated fish mortality of 7.5 tonnes (fish, algae and waste) was observed in this Seine River area. The Seine River quality monitoring networks were immediately mobilized to monitor potential changes in the quality of the natural environment caused by the incident. The mobilization of teams from SIAAP, Sorbonne University (Piren-Seine), Normandy University and GIP-Seine Aval, made it possible to set up environmental monitoring, from Conflans-Sainte-Honorine to Tancarville (280 km of linear length of the Seine River). This article discusses the impact of the incident on the natural environment and its mitigation during the transit of water over the Seine Normandy watershed area located at Paris conurbation downstream.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02440142
Contributor : Pierre Weill <>
Submitted on : Wednesday, January 15, 2020 - 8:44:50 AM
Last modification on : Sunday, October 25, 2020 - 7:04:17 AM

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  • HAL Id : hal-02440142, version 1

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Sabrina Guerin, Robin Richoux, Erwan Garcia-Gonzalez, Sam Azimi, Vincent Rocher, et al.. Fonctionnement dégradé de la station d'épuration Seine Aval (Yvelines) du 3 au 5 juillet 2019 suite à l’incendie de l’unité de clarifloculation - Analyse de l’impact environnemental de l’événement sur la Seine. Revue L'Eau, L'Industrie, Les Nuisances, Johanet, 2019, pp.65-75. ⟨hal-02440142⟩

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