Possible material and manufacturing process for readymade Ecosan (UDDT) pan

  • kharallaxman
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Possible material and manufacturing process for readymade Ecosan (UDDT) pan

We are planning of developing new model of read-ymade ecosan (UDDT) pan in few hundreds to begin with. In this would appreciate hearing if you (a) have any view on the “material” the pan could be best developed in, and (b) know about possible manufacturing processes. Thanks.

Asia WASH Adviser, Terre des hommes
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  • JKMakowka
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Re: Possible material and manufacturing process for readymade Ecosan (UDDT) pan

The problem you will have is the "few hundreds" part, as most efficient plastic forming processes require expensive molds that only become cost efficient at a few thousand pieces or so.

You can make concrete/ferrocement pans with a kind of "liquid tile" or epoxy paint, but by the nature of the material, they are heavy to transport and crack prone.

Fibreglass is another not too uncommon method, especially when weight and durability during transport is an important factor (such as here in Nepal, where fibreglass pans can be found in remote mountain areas).

It might be also worth looking into foam core fibreglass (aka "surfboards") for building complete light-weight slabs, but I have not seen that practically done. However by cutting the foam to the right shape, it might be a quite easy production method.

Last but not least: you can make relatively nice UDDT slabs on site by embedding large plastic funnels into normal concrete slabs where the urine is going to be collected. Just connect a rubber hose to the bottom of the funnel afterwards.

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  • kharallaxman
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Re: Possible material and manufacturing process for readymade Ecosan (UDDT) pan

Thanks Makowka.
We may go for few thousands in that case. What may be the “prototype development - testing - refinement” process and what may be possible on this in Nepal? At present we are working on development of 3D drawing.

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  • canaday
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Re: Possible material and manufacturing process for readymade Ecosan (UDDT) pan

Dear Kharallaxman,

Please tell more about your project. Where will it be done? Who are the beneficiaries? What is the acceptable unit price? Why not use the beautiful, inexpensive Chinese or Indian manufactured squat pans?
www.gtz.de/en/dokumente/giz2011-en-appen...s-suppliers-list.pdf

Ferrocement floors for the entire rooms (120 x 120 cm? 3 cm thick) could be easily made at a central workshop, and then carried by 4-6 persons to trucks that transport them to the sites, if these are accessible by road.

Kris's mention of the possibility of using standard, factory-made, plastic funnels for the urine is, in fact, entirely feasible. I recommend the use of ones that are 25-cm diameter, placed at roughly a 45° angle.
inodoroseco.blogspot.com/2011/06/elegant...odoros-secos-de.html

I further recommend building single-chambered UDDTs with woven polypropylene sacks as interchangeable containers, since this reduces construction costs and gives us more control over potential flies and smells.
forum.susana.org/34-urine-diversion-syst...-southern-india#7558

We look forward to hearing more from you about this case.

Best wishes,
Chris Canaday

Conservation Biologist and EcoSan Promoter
Omaere Ethnobotanical Park
Puyo, Pastaza, Ecuador, South America
inodoroseco.blogspot.com
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  • kharallaxman
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Re: Possible material and manufacturing process for readymade Ecosan (UDDT) pan

Dear Canaday and Colleagues,

I attach here the pdf of the AutoCAD drawing of the pan in 2D that I just completed. We will go next to develop its 3D drawing.
Thanks, Laxman

Asia WASH Adviser, Terre des hommes

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  • watsanchandra
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Re: Possible material and manufacturing process for readymade Ecosan (UDDT) pan

Saw that. We can make it much more robust without need of cement slab too. Can you tell me how many sets you need to start with and what would be the long term quantity, so that I can send you the quote or both the pilot as well as regular lots. Material will be ibre glass. Mail to chandra@ watsan.in
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  • canaday
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Re: Possible material and manufacturing process for readymade Ecosan (UDDT) pan

Dear Kharallaxman,

Thank you for this drawing. It seems to me that it would be more complicated for users to shift to the side for anal washing, instead of shifting backward, especially given the fecal drop hole.

Also, construction cost will be much less if it is a single-chambered UDDT with interchangeable containers, like the common polypropylene sacks that I mentioned.

Please tell us more about the overall context. Who are these toilets for? Who will build them? What are the budget constraints? Why not use beautiful manufactured Chinese or Indian squat pans? What part of Nepal? What is the climate like there?

Best wishes,
Chris Canaday

Conservation Biologist and EcoSan Promoter
Omaere Ethnobotanical Park
Puyo, Pastaza, Ecuador, South America
inodoroseco.blogspot.com
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