NoMix technology

Eawag has a long history of developing innovative processes for separating wastewater at source. These technologies include one whereby urine is separated out using the NoMix Toilet, a project which numerous Eawag researchers have been working on for many years.

The NoMix principle is quite simple: The toilet separates urine and faeces so that urine can be collected separately from the rest of the wastewater. Thanks to a recycling process developed at Eawag, the urine collected in-house is converted into a high-grade fertiliser. Nutrients can thus be recovered from urine, which means that fertilisers do not have to be produced artificially. The use of urine as a fertiliser also takes the burden off the wastewater treatment facility, where nitrogen and traces of pharmaceuticals have to be removed from urine in a highly energy-intensive process. The NoMix technology therefore promotes the protection of natural waters at the same time as saving resources.

Further links

Vuna as an Eawag-spin-off

The Vuna GmbH spin-off was established on the back of the former Vuna project at Eawag, commercialising the technology that was developed in the project. 

Current projects

We develop reactors for the separate treatment of urine, feces and water directly in the toilet.
NEST building
Sustainable urban water and wastewater management applied and implemented in the modular NEST building.
Is a space research program, aiming to develop a bioregenerative life support system for long-term space missions and space habitations for example on Mars.

Previous projects

Die Urinseparierung als neues Element der Abwasserreinigung mit dem Ziel Gewässer besser vor Nährstoffen und Mikroverunreinigungen zu schützen und Nährstoffkreisläufe zu schliessen.
The STUN project, in cooperation with UN-HABITAT Nepal, examines various possibilities to recover nutrients from source-separated urine.
By recovering nutrients from urine, we develop a sanitation system, which produces a valuable fertiliser
As part of the “VUNA” research project, researchers have developed the new VUNA recycling technique by which valuable nutrients can be extracted from urine and used as fertilisers. The liquid fertiliser “Aurin” is the result of the project.
Single house wastewater treatment with water reuse
A broad overview of sanitation systems and technologies in various contexts.

Blue Diversion Toilet

As part of the Reinvent the Toilet Challenge this NoMix Toilet was developed for the purposes of resource recovery. The next generation of this emerged in the form of the Autarky Toilet, with resource recovery in the toilet itself.

Literature focus

Larsen, T. A.; Udert, K. M.; Lienert, J. (2013) Source separation and decentralization for wastewater management, 491 p, doi:10.2166/9781780401072, Institutional Repository