Nègrepelisse 4000-6000 p.e.

One of the largest and most efficient wastewater treatment plant with french system reed bed filter in France.

Nominal capacity : 4000 p.e. with an extension to 6000 p.e. 

Two stage vertical flow treatment plant designed for 4000-6000 p.e.

Additional Info

  • In operation since: 2009
  • Type of wastewater treated: Domestic
  • Hydraulic load: 720-1080 m³/day
  • Organic load (PE): 4000-6000 PE
  • Organic design load (kg BOD/day): 240-360
  • Location: Nègrepelisse, Departement of Tarn-et-Garonne (France)
  • Client: Com de Comm. Terrasses et Vallées de l'Aveyron
  • Stage 1 type: Vertical flow, non-saturated
  • Stage 1 surface area (m²): 800
  • Stage 2 type: Vertical flow, unsaturated
  • Stage 2 surface area (m²): 600
  • Needs:

    Integration of existing ponds, high outlet quality required for a discharge into the river, sustainable development

  • Solution:

    French system 2-vertical flow stages of treatment integrating the existing ponds.

  • Benefits:

    The plant discharges into the river a water quality similar to that released by the usual intensive treatment processes with operating costs twice as low, a markedly lower carbon impact and a greater reliability. The integration of the initial ponds into the treatment process improves nitrogen and phosphorus removal during summer time. It offers landscape preservation and a reduction of non renewable energy consumption as well as greehouse gases.

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