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.