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.
Procédé Ammonair


Process for controlling aeration in extended aeration activated sludge wastewater treatment plants.

Aqua-RM® membrane process for wastewater treatment


The AQUA-RM® process combines activated sludge biological treatment and submerged plate-membrane filtration for wastewater, making it particularly well-suited to the constraints of sensitive environments and coastal areas. Stations equipped with them are three times more compact than a conventional station.

Stereau's Aqua-RM® / CarboPlus® process


The combination of the AQUA-RM® submerged-plate membrane bioreactor and the CARBOPLUS® continuously-renewing Fluidized Activated Carbon reactor represents the best available technology for the complete treatment of urban and industrial wastewater, from pollutants to micropollutants.


The BEFLOW® AGS process offers a sustainable and efficient solution for wastewater treatment, combining a reduced footprint with improved plant capacity and efficiency.

Procédé Biolest - Stereau


Biological treatment by biofiltration on Biozzolane, BIOLEST® is particularly well-suited to compact plants with varying loads or dilute effluents that need to be integrated into a sensitive environment.


CARBOPLUS® EAUX USEES works on the principle of an activated carbon reactor on a fluidized bed with continuous renewal for the elimination of micropollutants.  

Telgruc-sur-Mer wastewater treatment plant (Finistère)


The COMPACT-RM® plant is an innovative wastewater treatment concept for small communities, industrial plants or neighborhoods not connected to the sewage network.  

Cyclaflux process - water treatment


An alternative to the conventional activated sludge process, CYCLAFLUX® is an activated sludge biological treatment process of the Sequential Biological Reactor (SBR) type. Biological treatment and sludge settling are not carried out continuously in separate, successive structures, but alternately in the same structure.  

Delreb® process - Stereau.


DELREB® technology is used for physico-chemically-assisted settling, combining coagulation, flocculation, separation of suspended solids by lamellar settling at high water head, and sludge recovery by rotary scraping.

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