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Association d'un lagunage naturel et d'infiltration-percolation : résultats des pilotes et stations de démonstration d'Aurignac

Abstract : Many small French communities have been equipped with Waste Stabilisation Ponds (WSP). Their effluent quality is relatively good for N and P but this treatment system is known to have a poor efficiency with regards to organic matter. Pilot trials show that it is possible to decrease 50% of the outlet SS and to obtain an additional nitrification thanks to one additional filtration on a 25 cm sand height. The follow-up of a self-priming siphon has shown its capacity to function with only one centimetre height of tidal range, while discharging more than 70 m3.h-1. The owner of Aurignac has accepted to built a demonstration WSP plant, followed by Intermittent Sand Filters (ISF), to treat the wastewater of about 300 PE. He has submitted in November 2001 this project to the EEC in the LIFE-environment program. The primary sludge which accumulates at the inlet of the 1st pond will be spread each day on four Sludge Dewatering Reed Bed Filters(SDRBF). The beginning of the plant's construction is planned during autumn 2002. This paper gives the results of pilot trials and of the siphon functioning. It describes the demonstration plant, explains our objectives and presents the planned specific monitoring program.
Mots-clés : CEMAGREF QELY EPU AURIGNAC
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Submitted on : Thursday, June 3, 2021 - 10:04:36 PM
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  • HAL Id : hal-02581050, version 1
  • IRSTEA : PUB00011077

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Catherine Boutin, A. Liénard, N. Bilotte, J.P. Naberac. Association d'un lagunage naturel et d'infiltration-percolation : résultats des pilotes et stations de démonstration d'Aurignac. 14ème rencontre régionale de l'environnement (ARPE), Antibes, 23 octobre 2002, Oct 2002, Antibes, France. pp.13. ⟨hal-02581050⟩

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