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Topics in Category: Innovations and research in toilet design - SuSanA Forum http://forum.susana.org Fri, 26 May 2017 03:36:31 +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: fcharlesc http://forum.susana.org/106-user-interface-technology-innovations/8209-south-african-sanitation-technology-demonstration-programme-sastep-reinvented-toilet-technology-demonstration-and-roadmap-to-commercialization?start=12#20422 http://forum.susana.org/106-user-interface-technology-innovations/8209-south-african-sanitation-technology-demonstration-programme-sastep-reinvented-toilet-technology-demonstration-and-roadmap-to-commercialization?start=12#20422
I have been working around a similar concept but this one include both the superstructure and the semi-attached slab to facilitate emptying. However funds limit has been the main constraint. I will be able to share a full design once I finalise it]]>
Innovations and research in toilet design Sun, 12 Feb 2017 13:27:29 +0100
The Nano Membrane Toilet (Cranfield University, UK) - latest results and publications since 2016 - by: AParker http://forum.susana.org/106-user-interface-technology-innovations/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-since-2016?start=12#20026 http://forum.susana.org/106-user-interface-technology-innovations/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-since-2016?start=12#20026
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).

Alison]]>
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 http://forum.susana.org/106-user-interface-technology-innovations/19036-all-the-toilets-supported-by-bmgf-are-very-expensive-luxary-sophisticated-and-expensive-in-china#19600 http://forum.susana.org/106-user-interface-technology-innovations/19036-all-the-toilets-supported-by-bmgf-are-very-expensive-luxary-sophisticated-and-expensive-in-china#19600 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
Scott]]>
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 http://forum.susana.org/106-user-interface-technology-innovations/13252-introduction-to-hygienic-water-free-toilet-reinvent-the-toilet-challenge-india-institute-of-chemical-technology-mumbai-india#17770 http://forum.susana.org/106-user-interface-technology-innovations/13252-introduction-to-hygienic-water-free-toilet-reinvent-the-toilet-challenge-india-institute-of-chemical-technology-mumbai-india#17770 Innovations and research in toilet design Wed, 20 Apr 2016 03:14:47 +0200 The ArumLoo microflush toilet (South Africa) - by: SudhirPillay http://forum.susana.org/106-user-interface-technology-innovations/16704-the-arumloo-microflush-toilet-south-africa#16704 http://forum.susana.org/106-user-interface-technology-innovations/16704-the-arumloo-microflush-toilet-south-africa#16704 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.)

Background:

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:





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Note by moderator:
See also a related forum threads about pour flush toilets in South Africa here:
forum.susana.org/forum/categories/141-ot...dea-for-south-africa

forum.susana.org/forum/categories/141-ot...-with-biogas-systems ]]>
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 http://forum.susana.org/106-user-interface-technology-innovations/5228-development-of-superhydrophobic-surfaces-for-sanitation-solutions-university-of-rochester-usa#16287 http://forum.susana.org/106-user-interface-technology-innovations/5228-development-of-superhydrophobic-surfaces-for-sanitation-solutions-university-of-rochester-usa#16287


Thank you,

Chunlei


* 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: www.gatesfoundation.org/How-We-Work/Quic...s/2014/11/OPP1119542

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 http://forum.susana.org/106-user-interface-technology-innovations/4913-using-waste-to-move-waste-using-urine-to-flush-waste-nature-healing-nature-usa-and-cambodia#15875 http://forum.susana.org/106-user-interface-technology-innovations/4913-using-waste-to-move-waste-using-urine-to-flush-waste-nature-healing-nature-usa-and-cambodia#15875
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,
milli]]>
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 http://forum.susana.org/106-user-interface-technology-innovations/10818-hydrocyclone-separator-flush-toilet-for-on-site-sanitation-swedish-company-aquatron?start=12#15477 http://forum.susana.org/106-user-interface-technology-innovations/10818-hydrocyclone-separator-flush-toilet-for-on-site-sanitation-swedish-company-aquatron?start=12#15477 ]]> Innovations and research in toilet design Fri, 16 Oct 2015 04:25:23 +0200 Industrial Ultrasound in redesigned toilet seat - by: ChrisBuckley http://forum.susana.org/106-user-interface-technology-innovations/11116-industrial-ultrasound-in-redesigned-toilet-seat#15265 http://forum.susana.org/106-user-interface-technology-innovations/11116-industrial-ultrasound-in-redesigned-toilet-seat#15265 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
( prg.ukzn.ac.za/visiting-researchers/info...visiting-researchers )

Chris Buckley
This email address is being protected from spambots. You need JavaScript enabled to view it.
Pollution Research Group
UKZN]]>
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 http://forum.susana.org/106-user-interface-technology-innovations/13529-blue-diversion-autarky-a-self-sustaining-toilet-off-the-grid-eawag-switzerland#14676 http://forum.susana.org/106-user-interface-technology-innovations/13529-blue-diversion-autarky-a-self-sustaining-toilet-off-the-grid-eawag-switzerland#14676
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,
Stefanie]]>
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 http://forum.susana.org/106-user-interface-technology-innovations/4890-breathable-membrane-enclosures-for-fecal-sludge-stabilization-university-of-delaware-usa?start=36#14569 http://forum.susana.org/106-user-interface-technology-innovations/4890-breathable-membrane-enclosures-for-fecal-sludge-stabilization-university-of-delaware-usa?start=36#14569
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.

Thanks,
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 http://forum.susana.org/106-user-interface-technology-innovations/2956-grant-on-advanced-toilet-with-on-site-water-recovery-eawag-and-eoos-switzerland-and-austria-blue-diversion-toilet?start=36#14106 http://forum.susana.org/106-user-interface-technology-innovations/2956-grant-on-advanced-toilet-with-on-site-water-recovery-eawag-and-eoos-switzerland-and-austria-blue-diversion-toilet?start=36#14106
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,
Stefanie]]>
Innovations and research in toilet design Wed, 08 Jul 2015 15:06:21 +0200
Water diverting toilet solutions - by: kengelly http://forum.susana.org/106-user-interface-technology-innovations/4351-water-diverting-toilet-solutions#14089 http://forum.susana.org/106-user-interface-technology-innovations/4351-water-diverting-toilet-solutions#14089
I'd love to hear an update on these various projects!
Specifically searching for a solution suitable for urban, densely populated environments.

Many thanks!
Genevieve]]>
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 http://forum.susana.org/106-user-interface-technology-innovations/3409-the-nano-membrane-toilet-cranfield-university-uk-new-phase-of-funding-until-jan-2016?start=36#12596 http://forum.susana.org/106-user-interface-technology-innovations/3409-the-nano-membrane-toilet-cranfield-university-uk-new-phase-of-funding-until-jan-2016?start=36#12596
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!

Alison


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Note by moderator: This thread is now closed. Further discussions can take place in this thread:
forum.susana.org/forum/categories/105-pr...lts-publishing-stage ]]>
Innovations and research in toilet design Tue, 24 Mar 2015 11:59:37 +0100
Low-Cost Sanitation for Emergencies, tested in Haiti (Aerosan, USA and Haiti) - by: Andrew http://forum.susana.org/106-user-interface-technology-innovations/3425-low-cost-sanitation-for-emergencies-tested-in-haiti-aerosan-usa-and-haiti?start=12#12451 http://forum.susana.org/106-user-interface-technology-innovations/3425-low-cost-sanitation-for-emergencies-tested-in-haiti-aerosan-usa-and-haiti?start=12#12451
Thanks for your comments! The bags are made of the same material as the cubicles--the used vinyl billboard fabric. In the ones in Haiti they were somewhat large (1.5 m3) with the idea that the first part of the composting would occur at the toilet site. In practice, we found that it was better to compost everything at a secondary site and so we moved the partially full bags of the five arrays in operation (5 toilets per array) and set that up. It's not ideal and moving the material was difficult. Having the toilet superstructures be moved back and forth onto two bins (like a giant fossa alterna) was the idea, but it was harder to do in practice than we had originally thought. So the Haiti toilets are still functioning and not filling very fast (due to a level of composting which is decreasing volume even if it's not performing the hygienization process that we want), so they are working but the emptying of those systems remains a challenge. We are working on a different design which will be for single toilet units and which will be much easier to handle as far as maintenance is concerned.

I like the cylindrical approach as well--there are a lot of structural benefits to building them that way. We have only built these ones you see in the videos for the Delhi show. We are looking at going to single units and will be emphasizing the pack-ability/ship-ability issue, but I don't have a video of that. My new idea has us going away from the cylinders (at least for the moment) for a few reasons. Not sure how that will work out at the moment, but I feel like we have some good ideas.

The flexible strips for the walls were a problem in the India units--we had used masonite, which I didn't like, but it worked for the time being. I want to use strips cut from the 2 x 4s and am experimenting with that a bit.

We do not have a tech guide as of yet in Kreyol.

The rate of filling was one of the pleasant surprises to us--we found that they just weren't filling up and when we went to look at them 9 months after initial set-up, they were not full then, but we changed out the bags anyway, as described above. The thing is, I think there is a fair amount of volume loss due to the decomposition like you say, and I would like to be able to quantify that at some point.

As far as temperature monitoring, we did that while we were living in Cite Soleil with our own compost pile and found that we could regularly get temperatures over 70 C. We turned our compost often and experienced the spike at least 5 times before it gradually decreased. We were composting in Vodrey (our village) on the edge of Cite Soleil.

And yes, SOIL we know very well--Sasha and her team have made a ton of progress as far as promoting composting as a treatment method for sanitation. GiveLove, with whom I've also worked, has done a lot in that area as well.

Sorry for the late reply--I am not checking these posts often enough! Please feel free to ask anything else. There are some things about our design that I'm not satisfied with, and I think that's why I'm still trying some new ideas. The one thing I can say that I think we have a better handle on is the building style using wood and billboard fabric with each iteration. Each time we build something from these materials we learn more about how to perfect the building style itself--which is separate from all the process stuff, but a necessary part of a low-cost humanitarian solution.

Regards,

Andrew]]>
Innovations and research in toilet design Thu, 12 Mar 2015 03:33:49 +0100