The Nano Membrane Toilet

Treating human waste onsite without external energy or water.


The Nano Membrane Toilet will be able to treat human waste on-site without external energy or water. It is designed for single-household use (equivalent to 10 people) and will accept urine and faeces as a mixture. The flush uses a unique rotating mechanism without using any water whilst simultaneously blocking odour and the user’s view of the waste.

Solids separation (faeces) is principally accomplished through sedimentation. Loosely bound water (mostly from urine) is separated using low glass transition temperature hollow-fibre membranes. The unique nanostructured membrane wall facilitates water transport in the vapour state rather than as a liquid state which yields high rejection of pathogens and some odorous volatile compounds. The water will be collected for reuse at the household level in washing or irrigation applications.

Following release of unbound water, the residual solids are transported by mechanical screw into a combustor which will convert them into ash and energy. The energy will power the membrane processes, and there may be extra energy for charging mobile phones or other low voltage items.

Do you want to gain the skills to develop a technology like this? Apply now for our MSc courses in Water and Sanitation for Development, Renewable Energy, and our MDes course in Design Thinking





Green Gown Awards 2014


CleanEquity Monaco 2015 logo

Excellence in the Field of Environmental Technology Research
Patel Foundations logo
Kiran and Pallavi Patel Grand Innovation Award 2018

IWA logo
Gold award in the Breakthroughs in Research and Development category, IWA Project Innovation Awards

On twitter

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RT @iain_gray: Great news about @CranfieldUni #NanoMembrane #Toilet https://t.co/WcrJgaatvq ... equally important is the role that #DesignT…
Dec 06 2018

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RT @iain_gray: Great news about @CranfieldUni #NanoMembrane #Toilet https://t.co/WcrJgaatvq ... equally important is the role that #DesignT…
Dec 06 2018

Tweet by Iain Gray

Great news about @CranfieldUni #NanoMembrane #Toilet https://t.co/WcrJgaatvq ... equally important is the role that… https://t.co/GBNhMUoGjz
Dec 06 2018

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