Recycling water

March 1, 2025

Save water

By treating and reusing greywater on-site, we consume less freshwater and reduce our environmental impact. In today's world, where climate change and population growth are exacerbating water scarcity, recycling is becoming not just a useful practice, but a vital one. In a typical household, this can save us around half of our freshwater consumption.

What is grey water?

Greywater refers to used but not heavily contaminated wastewater from the household, e.g. from hand washing, dishwashing, laundry washing.

Recycling greywater and greening the surroundings

Greywater can be treated and reused on-site. Due to its low contamination level, it is particularly well-suited for this purpose. Vuna plans and builds the reuse system that fits your construction project, e.g.:

• PhytotinyOur most compact plant filter – modular, portable and easy to use. Cleans the greywater of 2 to 4 people.
• Planted soil filters: They add greenery to the surroundings and blend seamlessly into the landscape. We would be happy to tailor them to your specific project.
• FamoS: combines greywater treatment and facade greening. The substrate boxes in the rear of the module function on the principle of a biofilter, supplying the plants with water via water-bearing layers. Developed in collaboration with Synercity. Visit the pilot plant at NEST building from Eawag and Empa!

FamoS – the facade module with synergy effect