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A new generation of membranes using a specific bioreactor for the reuse of wastewater in urban areas

May 2021
Gallery NEOSTEP 1
Gallery NEOSTEP 1


The environmental impact of wastewater is constantly increasing with the demographic explosion and access to drinking water is becoming more and more difficult. The NEOSTEP solution developed by NEREUS transforms wastewater into recovered water. Thanks to its flexibility, water uses range from agricultural to drinking water. The NEOSTEP® solution embeds the latest generation of membranes allowing dynamic nanofiltration coupled with biological treatment and a final stage of filtration by reverse osmosis. Neostep is made to be energy-efficient, modular, robust and cheap ! NEREUS is the first water company to be labeled by the French environment ministry GreenTech "Acceleration" for its innovation potential.

  • /
Label Date May 5, 2021
By Nereus
From France
Maturity stage Medium and large scale commercialization
Looking For Network, New clients, Visibility, Funding

The environmental benefits

  • Up to 95% of the wastewater is recycled
  • The extracted water is 100% reusable
  • Dynamic nanofiltration consumes 5 times less energy than tangential filtration
  • 2850 m3 of reused water, the equivalent of an olympic pool of drinking water saved every year
  • Up to 49.7 kWh of recovered heat each year, 9.2 tons of Co2 emissions avoided
  • 0 liquid discharge on the wastewater network

The Financial benefits

  • 5 times less energy consumption than conventional static membrane
  • Less than 4,9 euros per m3 of recycled water on a Neostep unit, amortized over 12 years
  • Control of water quality according to needs throughout the year

Activity Region

  • /
  • Headquarters
  • Activity

Company Profile


NEREUS provides innovative and sustainable recycling systems for effluents like digestate, wastewater...

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Headquarters 34230 Popian, France

Networking Partner


#French #Water #Cluster. 250 members. Competitivenes. Innovation. International. #Occitanie #PACA

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Solutions Associated 15
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The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator Nereus has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.