XXII Triennale di Milano: Circular Flows

Official Austrian Contribution with EOOS

Official Austrian Contribution: CIRCULAR FLOWS

It is one of the most pressing environmental problems of our time and yet largely unknown: the pollution of our waters by nitrogen. The renowned Viennese design studio EOOS has developed the revolutionary prototype of a toilet for urine separation (urine trap), which offers a systemic design solution to fight the global nitrogen problem. The official Austrian contribution to the XXII Triennale di Milano presents the urine trap in a flush toilet developed together with the Swiss ceramics manufacturer LAUFEN, and embedded in a multimedia installation (by Process Studio, Vienna, with a light display by Zumtobel) that illustrates the ecological interaction of coastal waters, sewage systems and agriculture. The EOOS exhibition shows the contribution the urine separation toilet can make to the repair of the nitrogen cycle and thus to the preservation of the ecological boundaries of our planet.


The project is based on research by Eawag, the Swiss Federal Institute of Aquatic Science and Technology, for the Bill & Melinda Gates Foundation, and EOOS is responsible for the design of the urine trap. As an internationally active design studio working for brands such as Adidas, Armani, bulthaup, Walter Knoll, LAUFEN, Herman Miller, Zumtobel, i.a., EOOS has been dedicated to projects in social and sustainable design since several years. The Austrian contribution was commissioned by MAK – Museum of Applied Arts, Vienna and financed by the Federal Chancellery of Austria.

Circular Flows @ triennale.org
Circular Flows @ MAK.at
Official Press Release (german)

Winner of the XXII Triennale di Milano Silver Award.

CIRCULAR FLOWS: The Toilet Revolution

Official Austrian Contribution
XXII Triennale di Milano 2019 International Exhibition
Milan, Italy, 1 March – 1 September 2019

Christoph Thun-Hohenstein
MAK General Director and Artistic Director, MAK

Marlies Wirth
MAK Curator Digital Culture and Design Collection, MAK

Concept, Design, and Installation

Animation and Graphic Design
Process Studio
Creative Direction, Technical Direction, Design: Martin Grödl and Moritz Resl
Particles Animation: Herwig Scherabon

Urine Trap Toilet

Light Display

Federal Chancellery of Austria
MAK – Museum of Applied Arts, Vienna

Tove Larsen (Swiss Federal Institute of Aquatic Science and Technology)
Austrian Cultural Forum Milan


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