Field testing a mechanical waterless flush

Jan Hennigs, Ross Tiereny, Dani Barrington, Matt Collins, Bhavin Engineer, Athanasios J. Kolios, Ewan McAdam, Alison Parker, Kristin T. Ravndal, Pedro Talaia, Sean Tyrrel, Leon Williams

Research output: Contribution to conferencePosterpeer-review


In 2011, the Bill and Melinda Gates Foundation initiated the Reinvent The Toilet Challenge (RTTC), to find sustainable sanitation solutions for the 2.5 billion people worldwide who don’t have access to safe, affordable sanitation. In response to the RTTC, Cranfield University is developing the Nano Membrane Toilet (NMT), a novel technology which treats both liquid and solid fractions using a mechanical waterless flush, a settling tank for solid-liquid separation, membrane bundles and a dryer-combustor combination. (For more information visit A prototype of the toilet’s frontend – i.e. the user interface including the seat and the mechanical flush, which comprises a rotating bowl and a swipe to clean the bowl as it rotates downward to empty it’s contents into the settling tank – was tested in field trials at a research institution and peri-urban households in South Africa. Testing included physical tests as well as user surveys and –interviews. This poster focuses on the physical tests, the findings of which were later confirmed in controlled laboratory experiments using synthetic faeces, -urine, and -menstrual fluid.
Original languageEnglish
Publication statusPublished - 2018
EventUK-IWA Young Water Professionals Conference - Cranfield University, Cranfield, United Kingdom
Duration: 1 Mar 2018 → …


ConferenceUK-IWA Young Water Professionals Conference
Country/TerritoryUnited Kingdom
Period1/03/18 → …


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