Ecological and landscaped


The design is energy efficient and reduces the use of complex industrial products generating greenhouse gas emissions. This ecological and on-site septage treatment principle meets the strong demand and growing interest for:

  1. developing non-sewered systems
  2. finding local solutions to the problem of treating septage, in a spirit of autonomy to the countryside, of reduced trucking and improved carbon footprints…
  3. finding sustainable development alternatives to the current intensive solutions with their high transport and energy consumption
  4. economic constraints favouring CW solutions, slightly less expensive in investment costs and far less expensive in operating costs.

This request is identified at different levels:

  • nationwide: 5 million individual installations in 2006 + 200 000/ year (source: IFEN)
  • Europe-wide: 20 million individual installations in 2010, potential of 100 million in the near future

worldwide: important potential for latrine equipment, optimum sanitation system for poor countries, currently inhibited by a lack of extensive septage treatment technology.


The plant merges with the local landscape:

  • the receiving unit, the aerated storage tank, the buffer basin, the pumping units are built mostly underground
  • the reed beds are mostly excavated and the reed heads, when they emerge from the basins (at maximum sludge level), are in harmony with the rural environment
  • the technical buildings are of local architectural appearance.

The design follows the landscape charter of the Midi-Quercy County.

roseaux filtre les MES
French constructed wetland’s history

The WTP was the biggest French constructed wetland plant when it was constructed.


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