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Topics in Category: Innovations and research in toilet design - SuSanA Forum Sat, 24 Jun 2017 08:50:33 +0200 Joomla! - Open Source Content Management /media/kunena/images/icons/rss.png Topics in Category: Innovations and research in toilet design - SuSanA Forum en-gb South African Sanitation Technology Demonstration Programme (SASTEP) - Reinvented Toilet Technology Demonstration and Roadmap to Commercialization - by: SudhirPillay ) Programme under controlled conditions in eThekwini Municipality before being moved to its final destination in rural Eastern Cape.

The units have both pedestals and urinals, and are separated according to sex.

Please see photos attached.]]>
Innovations and research in toilet design Tue, 13 Jun 2017 12:40:06 +0200
An Alternative to the Pit Latrine - by: dandreatta
This is an alternative to the simple pit latrine, It uses a barrel on its side, then the barrel is emptied by one of two means. The simplest version just has a spout, into which the contents of the barrel can be poured. The more complex version has a flexible tube attached to the barrel, which can server as part of a VIP style chimney, and as the barrel emptying method. Either method is neat and tidy.

The best way to show the system is the following video:

and I've attached a few still from the video below.

I expect this system will work well in places with a high water table or flooding, since it is a sealed container above ground level. I expect this will work well in places with loose soil, where an unlined pit latrine would collapse. I expect this would work well in places where sanitation must be set up in a hurry, and leftover barrels from some other task could be pressed into service. Perhaps a refugee camp? Of course, some organizational system must be in place to empty the barrel and transport the sludge away.

One person asked about the liquidity of the barrel contents. If it's a combination of urine and feces, it will be liquid enough to pour. Trash will flow easily through the large openings. Any flush water will make the content even more liquid. I would think this will not work with a composting or urine diverting toilet.


Dale Andreatta]]>
Innovations and research in toilet design Sun, 07 May 2017 18:44:07 +0200
The Nano Membrane Toilet (Cranfield University, UK) - latest results and publications since 2016 - by: AParker
The membrane will be modular. However, we would be nervous about installing the toilet without the membrane as the untreated liquid component will still be pretty nasty - basically feacally contaminated urine, which could cause significant groundwater contamination, depending on the local conditions. Our energy modelling suggests we will be able to get enough energy out of the faces to enable the membrane processes.

The membranes are hydrophobic so fouling is not too much of a problem (a paper on this is in preparation).

Innovations and research in toilet design Mon, 09 Jan 2017 12:36:13 +0100
All the toilets supported by BMGF are very expensive, luxary, sophisticated and expensive in China - by: scottchen Half a year ago, there was a toilet competition in China funded by Gatets foundation. All the winnners come with advanced and sophiscated systems and claim theie device can turn the waste into drinkingable water...
As for the toilet you mentioned , i think 300 USD is not cheap at all comparing with normal flush toielts.
I would be very please if you could tell me more infomation about it.
best wishes
Innovations and research in toilet design Fri, 18 Nov 2016 16:49:01 +0100
Introduction to Hygienic Water Free Toilet (Reinvent the Toilet Challenge India) - Institute of Chemical Technology, Mumbai, India - by: ekellogg Innovations and research in toilet design Wed, 20 Apr 2016 03:14:47 +0200 The ArumLoo microflush toilet (South Africa) - by: SudhirPillay Research Manager: Mr Jay Bhagwan (This email address is being protected from spambots. You need JavaScript enabled to view it.)
Project Leader: Jonny Harris (This email address is being protected from spambots. You need JavaScript enabled to view it.)


The WRC funded the innovation of a Micro Flush toilet, with the objective of reducing the amount of water required for flushing. The final prototype – branded as the “Arumloo” as its design mimics water movement in nature’s Arum Lily plant. The Arumloo uses between 1 to 2,5 litres of water per flush, using a dual-flush mechanism. A flush is achieved using an innovative pan design that creates a vortex to remove stools more efficiently and a gush of water (‘gush flush”) that enters into the P-trap (see photo). The elongated P-Trap with an inverted egg shape profile enables effective conveyance of waste at low water volumes and the convex shape toilet pan promotes an accelerating vortex action for effective clearing of waste. The prototype has been tested with synthetic stools made from soya paste and newspaper and toilet paper, and has passed the international MaP tests used for testing of toilets.

Please see videos of flushing action. Notice the origin of the flush in videos:

Note by moderator:
See also a related forum threads about pour flush toilets in South Africa here: ]]>
Innovations and research in toilet design Tue, 26 Jan 2016 08:35:30 +0100
Development of superhydrophobic surfaces for sanitation solutions (University of Rochester, USA) - by: guo

Thank you,


* Note by moderator: This project started in 2011 with a GCE grant for 100,000 USD and was extended into a second phase which lasts until December 2016 with a grant value of 421,300 USD, see:

Purpose: to develop low cost, self-cleaning and anti-fouling superhydrophobic plastics that will require virtually no operation and maintenance costs, which can be used in sanitation solutions

For more information about this project, please scrol up to the beginning of this thread.]]>
Innovations and research in toilet design Thu, 17 Dec 2015 04:00:59 +0100
Using waste to move waste - using urine to flush waste (Nature Healing Nature, USA and Cambodia) - by: milli
interesting aspects, reading about your project!

I am actually wondering how you solved the problem of possible odour emissions. I would imagine, if urine gets collected it would start to smell. how did you avoid that?

Best regards,
Innovations and research in toilet design Thu, 12 Nov 2015 15:21:49 +0100
Hydrocyclone separator flush toilet for on-site sanitation (Swedish company Aquatron) - by: sudheer ]]> Innovations and research in toilet design Fri, 16 Oct 2015 04:25:23 +0200 Industrial Ultrasound in redesigned toilet seat - by: ChrisBuckley Tina Velkushanova (This email address is being protected from spambots. You need JavaScript enabled to view it.) has been working on variants of the Delhi Fair faeces recipe for people with different needs. I suggest you contact her as we are able to work with fresh faeces in our laboratory and thus could undertake side by side tests with faeces and stimulant.

Alternatively you could send a student to work in our lab with your actual equipment. See our web site for details about working in Durban
( )

Chris Buckley
This email address is being protected from spambots. You need JavaScript enabled to view it.
Pollution Research Group
Innovations and research in toilet design Sun, 04 Oct 2015 11:08:28 +0200
Blue Diversion AUTARKY - A self-sustaining toilet off the grid (EAWAG, Switzerland) - by: SteffiE
thank you very much for your critical comments, we really welcome them.

It is true that the Autarky toilet requires constant electricity, but this energy demand will be covered by a solar panel. To switch the toilet on or respectively heating up the feces module, a generator or a plug is needed once. The installation of the toilet must be done by trained stuff which involves the provision of a generator for this first heating up. We consider it more complicated to get energy from outside as you proposed.

Regarding your doubts on the feces treatment, we think it would be a very big step if we could treat feces on household scale and a tremendous cost reduction from an environmental and social point of view. The reactor concept consists of materials which are available in almost all parts of the world and not of high-tech nature, we always have the cost argument in mind (it is difficult but we really do).

We will develop a modular toilet where urine, water and feces should be treated independently but in one toilet system and thereby being able to respond to different demands and conditions. It might be an option that urine is distributed to the soil in less populated areas, however it is not the safest way and in this project we have the goal to develop a toilet especially for the urban context where no space is available to do so.

I hope I could answer your questions - if not, please let me know.
Thanks a lot for your comments,
Innovations and research in toilet design Tue, 25 Aug 2015 14:30:47 +0200
Breathable membrane enclosures for fecal sludge stabilization (University of Delaware, USA) - by: shraysaxena88
Thank you for your question.
We currently have a ventilation pipe for the toilets to reduce odors from spreading inside the house. We 'guess' that it increases the drying rates however small that may be. Further laboratory testing is under way to quantify this amount.
Our next phase of testing is a change in design from a large 55-gallon drum to a smaller 10.5 gallon drum size. This allows for a higher volume to surface area ratio. But as shown in my presentation that Elisabeth has posted, the drying rate is dependent a lot more on the ambient temperature and humidity conditions.
The drying rates are slow for a over-populated nation of washers but it should work well for drier and hotter climates where water stress is an issue.

Shray Saxena]]>
Innovations and research in toilet design Tue, 18 Aug 2015 14:06:24 +0200
Grant on Advanced Toilet with On-Site Water Recovery (Eawag and EOOS, Switzerland and Austria) – Blue diversion toilet - by: SteffiE
Thank you very much for your message and interest in the Blue Diversion Toilet. So far we have been testing our prototype in Uganda and Kenya with very promising results, however, nothing has been done in Ethiopia so far. We would of course be very interested in field testing in Ethiopia, especially regarding the business model which we couldn't apply under real conditions so far, but technically wise this won't be possible. Our prototype needs to undergo a reengineering before going into the field again, implementing our findings from Nairobi.

At the moment we are seeking for industrial partners or investors in order to do so. You are a bit too early with your request since there are no "other" prototypes available.

I hope we could help you with this answer. If there is any path change, we will definitely give you an update.

All the best,
Innovations and research in toilet design Wed, 08 Jul 2015 15:06:21 +0200
Water diverting toilet solutions - by: kengelly
I'd love to hear an update on these various projects!
Specifically searching for a solution suitable for urban, densely populated environments.

Many thanks!
Innovations and research in toilet design Tue, 07 Jul 2015 23:04:24 +0200
The Nano Membrane Toilet (Cranfield University, UK) - new phase of funding until Jan. 2016 - by: AParker
Thanks again for your insightful question. We're still not concerned about biofouling due to the membrane materials. But we are a bit concerned about the formation of salt crystals on the membrane surface - these would be derived predominantly from urine. So this is what one of our post docs, Olivier Autin, is looking at.

I hope this clarifies this and if you have any other questions then Olivier and I can try to answer them!



Note by moderator: This thread is now closed. Further discussions can take place in this thread: ]]>
Innovations and research in toilet design Tue, 24 Mar 2015 11:59:37 +0100