Sustainable and circular public toilet

Plant-based unisex urinal treating wastewater in an integrated vertical constructed wetland ecosystem. Treated wastewater is reused for flushing. Nutrients in urine are transformed into fertilizer.LooPi scheme graphic

Intelligent alternative for cities, companies, technology centers, uni & sport campuses, shopping malls, zoos etc. wherever people are in need for a toilet!

LooPiAdvantages of LooPi:

    • Reducing water consumption by 90%
    • Transformating nutrients from urine in fertilizer
    • Being gender neutral and child-friendly
    • Capturing CO2 from atmosphere
    • Cooling and humidifying surrounding air
    • Increasing biodiversity on species and ecosystem level

Technical data:

    • Size: 2,5 m l x 2,5 m h x 2,3 m w
    • Weight: 12 t, distributed on 8 supporting points
    • Capacity: treatment of 30 L urine / 24 hr
    • Energy consumption: 5 kWh / d
    • >200 plants from <30 species


Requirements for locations:

    • Connection to rainwater drainage nearby
    • Connection to energy grid nearby
    • Connection to fresh water withdrawal nearby (optional)

We are looking for

  • Early Adopters
  • Distribution partners
  • Investors for further development

LooPi is a functional green infrastructure supporting sustainability and circular economy.

Addressing the following SDGs:

SDGs LooPi

Closing the water cycle and the nutrient cycle.
LooPi is designed to be dismantled and reused/recycled.


Green Concept Award Winner 2021 innovate4nature

Press (in german):

Futurezone “Pflanzen-Klo spart Wasser und reinigt sich selbst”
Die Presse “Hinter’s Gebüsch hockerln? Das geht jetzt ökologisch sinnvoll!”
Die Presse “Weltpremiere in Wien: Ein Urinal als Teil einer Umweltmission”
Kurier “Das fliegende Pflanzen-Urinal im Esterházypark”
Mein Bezirk “Eine Toilette sorgt für besseres Klima”
brutkasten “Award für mit 280.000 Euro gefördertes Unisex-Pflanzen-Urinal”
Wien “Nachhaltiges Klo soll Umgebung kühlen”
DerStandard “Kreislaufwirtschaft auf dem stillen Örtchen”