What is the current summary on Urine-diverting Flush Toilets? - and example of UD flush squatting pan from China

  • canaday
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What is the current summary on Urine-diverting Flush Toilets?

Hi everyone,

What is the current summary on Urine-diverting Flush Toilets?
(Of course, I mostly promote UDDTs, but some users are not ready for them yet.)

I am designing a system in which a reasonable amount of water can also join the urine, since the urine + some greywater will go immediately to the soil where crops are grown.

I am starting to think that the most practical option is to have a Waterless Urinal, like I make with a 20-liter plastic bottle
( inodoroseco.blogspot.com/2015/12/un-nuev...inario-sin-agua.html )
... sit on the edge of the flush toilet bowl ... and pee into the urinal (held leaning toward the toilet), while pooping into the toilet (which should be feasible for both men and women).

On that front, which is the best brand of water-conserving flush toilet?

Thanks,
Chris Canaday

Conservation Biologist and EcoSan Promoter
Omaere Ethnobotanical Park
Puyo, Pastaza, Ecuador, South America
inodoroseco.blogspot.com
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  • prince
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Re: What is the current summary on Urine-diverting Flush Toilets?

I support this urine+water to recycle abandoned farms because of land infertility. Hope this research will help more farmers in Uganda and Kenya if we replicate it here. Thanks Prince Maloba
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  • muench
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Re: What is the current summary on Urine-diverting Flush Toilets?

Hi Chris,
You asked: "What is the current summary on Urine-diverting Flush Toilets?". I have no updated information on this. I had the feeling that perhaps they are a bit "out" (not that they have ever been really "in"). Although recently Aimee Smith from PRG in Durban (Chris Buckley's group) told me:

I have a question that I hope you can assist me with. We are working on a project for one of the municipal buildings in Durban and they are considering installing UD toilets in one of their buildings. Do you have a list, or know of, any municipal buildings worldwide that currently have UD toilets installed in them (for both staff and customer usage)?

The Durban Municipality wants to make a presentation to some of the senior level management and we wanted to include some info about whether they will be the first municipal building to put such a toilet system in their customer care center. There is also a urine-to-fertilizer treatment plant in the basement of the customer care center that is currently connected to the male urinals. The toilets will be flush based (these chosen pedestals save 80% of water) and both the staff and customers will use them.

There is currently a stigma in the rural communities that only "poor" people use UD/non-sewered toilet systems (all of these alternative systems are usually seen as temporary solutions to a lot of the communities) therefore we want to engage with the public and emphasise the importance of water conservation, resource recovery and promote non-sewered sanitation.


I hope Aimee or someone from the team can elaborate?

Regarding low-flush toilets in general, there was a similar question here on the forum which only got a reply from me and one other person so far:
forum.susana.org/low-flush-pour-flush-fo...-saving-flush-toilet

Regards,
Elisabeth

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  • goeco
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Re: What is the current summary on Urine-diverting Flush Toilets?

Hi Elisabeth, Perhaps this recent post is more relevant to this topic?
forum.susana.org/india/22276-ecological-...india-is-it-possible

cheers
Dean

Dean Satchell, M For. Sc.
Go-Eco Sustainable Solutions
www.go-eco.co.nz
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  • mutware
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Re: What is the current summary on Urine-diverting Flush Toilets?

I think that ECOSAN is very important for avoiding faeces-related illnesses and using urine as fertilizer. I wish that ECOSAN should be expanded widely in low-income developing countries.
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  • scottchen
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Re: What is the current summary on Urine-diverting Flush Toilets?

hi, Chris:
I do have a very creative urine-diverting flush ceremic toilet , very unique design with very good separation. There is no chance that the urine is to be pollutted by the solid waste.

Here is a photo:



Please send me email at This email address is being protected from spambots. You need JavaScript enabled to view it. for more details.
best wishes
chen xiang yang

Chen Xiang Yang, an apple dealer,is growing apples and cherries with the human waste collected from 31 school UDDTs donated by SOHO China Foundation, based in Tianshui City, Gansu Province , China. This email address is being protected from spambots. You need JavaScript enabled to view it., tel:0086 151 9380 3972
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  • muench
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Re: What is the current summary on Urine-diverting Flush Toilets?

Hi Scott,

Thanks for this picture of a "urine-diverting flush squatting pan". The black hole at the front of the picture is for urine, yes?

Are you able to tell us more on this forum or is it a business secret? My questions would be:
- How much does one cost?
- Who is the supplier? Website?
- How many of these have been sold? Who is buying them and why?
- Does the urine get collected and reused?
- Do the users ever mess it up by squatting over it the wrong way around?

Regards,
Elisabeth

Community manager and chief moderator of this forum
funded via SEI project until January 2019 ( www.susana.org/en/resources/projects/details/127 )

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  • bowenarrow
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Re: What is the current summary on Urine-diverting Flush Toilets?

My apologies if my reply is repeated.
It is interesting to see that apples and cherries are being grown with re-use principles in mind. Congratulation as to me it is the way forward.
I would like to make comments on the design of this ceramic squat plate from a manufacturers/ designers point of view. The deign is a "recess" type of shape having vertical sides all around that give rise to lodgement, cleaning and appearance problems. I would reshape the collection area from a recess to a bowl shape, having sloping sides all around and create a funnel shape for the solids hole. This would allow a better exit for the solids and make cleaning easier.
Just my personal view.
Ross
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  • scottchen
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Re: What is the current summary on Urine-diverting Flush Toilets?

hi, Ross:
Thank you for your comments on the toilet.
90% cherries and apples were frozen to death while the tress were blossoming in mid April .We have never seen such a cold climate.
Possibly that is one of the reasons for us to discuss toilet design here to cope with the cliamte change.
This doulble flush toilets were made for several hundred public toilets in Hainan island. The purposes are :
1, reduce the urine flush water by women.
After the pee, they can leave and the urine woudl be flushed automatically with less than half a liter water.
2, collecting the urine as raw materials for making medicine.

The major advantage of this toiet is It can avoid the the pollution of solid waste to urine because it is made from a normal flush toilet with a hole drilled for urine on site.
Is is unavoidalbe that some people will use the urine diverting toilet not to our design ,..putting in their shit on the front bowl you are planning to design. It is very common that some pupils are doing this in UDDTs of the schools as shown in the attached picture, everyday.

It is better to have a slop for urine collection part instead of a bowl. It is easily washed away even if there are little solid waste there.

That is my oppinion.

best wishes
Scott

Chen Xiang Yang, an apple dealer,is growing apples and cherries with the human waste collected from 31 school UDDTs donated by SOHO China Foundation, based in Tianshui City, Gansu Province , China. This email address is being protected from spambots. You need JavaScript enabled to view it., tel:0086 151 9380 3972
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  • scottchen
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Re: What is the current summary on Urine-diverting Flush Toilets?

hi, Elisabeth:
Sorry for my late answer to you.
Yes, the black hole , a metal grid, at the front of the picture is for urine. It is a hole drilled on a normal flush toilet actually.
The cost is almost the same as a normal flush toilet.
The supplier is a company in Beijing. They equip this urine hole with a patented odour trap device which is the best in world , I think. Unfortuantely, they do not want sell the toilet to any countries before they apply the patent.
Only several hundred pans are being installed in Hainan island for collecting urine to make medicine in the publice toielts.
As i replied to Ross, even someone misused the the toilet, it would be very easy to flush it away because of the normal slope.
best wishes
Scott

Chen Xiang Yang, an apple dealer,is growing apples and cherries with the human waste collected from 31 school UDDTs donated by SOHO China Foundation, based in Tianshui City, Gansu Province , China. This email address is being protected from spambots. You need JavaScript enabled to view it., tel:0086 151 9380 3972
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  • bowenarrow
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Re: What is the current summary on Urine-diverting Flush Toilets?

Good morning Scott.
That attached pic is a much better design. The large sloping bowl (over generous to me) area at the front would allow a fast flow and the solids hole is large enough, although I would like to see sloped sides to this. One feature I do like is that the unit is narrow and not so much of a plate. Squat toilets by nature suffer from shoe scuffing whereas this design allows for the shoes to be away from the glazed surface and onto the tiled floor. This design would lend itself to glassfibre production.
I have a friend I Hainan at the moment so I'll get him to check them out.
Cheers Ross
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  • muench
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Re: What is the current summary on Urine-diverting Flush Toilets?

Dear Scott,

Your posts are always so interesting! I think you are the only active contributor from China we have on this forum. Thank you for being with us!

Just a small question. You said:
"Only several hundred pans are being installed in Hainan island for collecting urine to make medicine"

What kind of medicine? I am thinking "Traditional chinese medicine" and quickly checked on Wikipedia:
en.wikipedia.org/wiki/Traditional_Chinese_medicine
There it says:

Traditional Chinese Medicine also includes some human parts: the classic Materia medica (Bencao Gangmu) describes the use of 35 human body parts and excreta in medicines, including bones, fingernail, hairs, dandruff, earwax, impurities on the teeth, feces, urine, sweat, organs, but most are no longer in use.[112][113][114]


But I guess that's not it? Are they perhaps extracting certain hormones from the urine? I was once part of a scheme in the Netherlands where a pregnancy hormone (hCG) was extracted from the urine of pregnant women which was then utilised to help other women with fertility problems: en.wikipedia.org/wiki/Human_chorionic_gonadotropin#Production

So I am curious to know which medicine this is.

Elisabeth

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funded via SEI project until January 2019 ( www.susana.org/en/resources/projects/details/127 )

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This email address is being protected from spambots. You need JavaScript enabled to view it. Twitter: @EvMuench
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