Wastewater treatment plant for 1250 p.e., in a very touristic site in the south of France, separative sewerage system, constructed in 1998.

“French sytem” treating raw unsettled sewage in a 2 stage vertical flow reed bed filter without electricity


1st stage 1050 m² (3*350 m²), fed directly by a siphon after coarse, manual screening only

2nd stage 500 m² (2 * 250 m²), fed by a siphon

No electricity on site

Designed and constructed by SINT / EPUR NATURE



Additional Info

  • In operation since: 1998
  • Type of wastewater treated: Domestic
  • Hydraulic load: 187,5 m³/day
  • Organic load (PE): 1250 PE
  • Organic design load (kg BOD/day): 75 kg BOD/day
  • Location: Vallée des fées
  • Client: Municipality of Rousssilon
  • Stage 1 type: French system
  • Stage 1 surface area (m²): 1050
  • Stage 2 type: Vertical flow, unsaturated
  • Stage 2 surface area (m²): 500
  • Needs:

    The town of Roussillon had to replace their old trickling filter to treat the wastewater of the village, with a very important tourist population in the summer, in a very sensitive environment.  No electricity on site.

  • Solution:

    Two stage reed bed filters, fed by gravity flow siphons, which don't need electricity.  There is no primary treatment, the raw, only manually coarse screened sewage is fed directly on the first stage beds    

  • Benefits:

    The reed beds blend completly into the valley, which is visited by many tourists.   Since it was put into operation , the plant has been treating an average pollution load of 1320 p.e. in the high summer season and of 550 p.e. in the low winter season.  The beds were desludged for the first time in september 2011, after 13 years of operation.

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