The cross-border sewage treatment plant in Wissembourg assures the treatment of waste water and rain coming from the collection systems of the Town of Wissembourg and neighbouring German communities; Schweigen-Rechtenbach, Schweighoffen and the Saint-Germanshof hamlet.

Examples of technical solutions implemented

This station, with the latest generation of technology, proposes two leading innovations:

  • Technique related to the process with the installation of hybrid type air boosters, allowing energy to be saved at the main area it is consumed: ventilation.
  • The management of ventilation with the latest technology sensors (ammonium/nitrates) allows energy consumption to be optimised, and reach an excellent treatment level, particularly for various forms of nitrogen.

Summary of know-how on the site

The operation of the station: a double parking station allowing continuity of treatment to be ensured in the event of large interventions.
The Green Rejection Area, created between the disposal point of the station and Lauter, which namely ensures a biotope role.

Key figures

Commissioning date: October 2014
Treatment capacity: 30,000 population-equivalents (35,000 in harvest period)
Daily volume of waste water treated in dry weather: 4,000 – 5,000 m3/day
Daily volume of effluent treatable in rainy weather: 13,500 m3/day
Volume of ventilation basins: 2 x 4,600 m3
Surface of clarifiers: 2 x 426 m ²
2,700 kg of raw sludge treated per hour (at 22% dryness)
750 tons of dry matter i.e. approximately 3,400 tonnes of dehydrated sludge produced annually.

More on the operation of this station:

Main stakeholder

Syndicat des Eaux et de l'Assainissement Alsace-Moselle (SDEA)

Espace Européen de l'Entreprise - Schiltigheim - 1 rue de Rome CS10020


Players involved and their roles

Syndicat des Eaux et de l'Assainissement Alsace-Moselle (SDEA) - Périmètre de Wissembourg

SDEA - Pôle Etudes - Bureau d'Etudes Epuration

Ville de Wissembourg