Our solutions

A wide range of solutions to help you make the water transition in your region

Water treatment technologies and facilities play a central role in public health, providing access to quality drinking water, combating pollution, preserving the environment and biodiversity, and enhancing the resilience of communities. With the challenges posed by climate change and emerging pollutants, the water sector requires increasingly advanced and innovative solutions.

To address these challenges, Stereau develops and implements innovative processes tailored to various types of water and new sources of pollution. These processes are among the most effective and competitive in the market, and they contribute to:

  • adapt processes to variations in water quality,
  • effectively combat micropollutants,
  • optimize energy and reagent consumption,
  • preserve resources by regenerating them (reuse of treated wastewater and recycling of raw materials),
  • agronomic and energy recovery from sewage sludge,
  • reduce the production of greenhouse gases by limiting the use of fossil fuels.
Digesthane process - Stereau


Sludge reduction and energy recovery process optimizing the performance of conventional anaerobic digestion. The anaerobic digestion process is enhanced and accelerated by ultrasonic sludge pre-treatment.  

Greenhouse equipped with Stereau's Helisol solar drying process.


Based on evaporation, the HELISOL™ natural sludge drying process is an ecological and economical answer to the difficulties of sludge storage and disposal by using the properties of air and sunlight.  

Lanodor® process


Biological Treatment of Odors from Wastewater and Sludge Treatment.

Stereau's Sonoflux sludge recovery process.


A physical ultrasonic cell lysis process for the pretreatment of biological sludge, SONOFLUX® optimizes the performance of anaerobic or aerobic sludge digestion.  

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