Urine Disposal? - Renovating a public urinal maintained and built by a slum settlement in India

  • shayontoni
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Urine Disposal

Hello everyone.
I am currently in the process of renovating a public urinal maintained and built by a slum settlement. The urine flows directly into a drain (carrying greywater and stormwater- as is the usual case for slums).
After having gone through most information I could find online, i have the following queries for you:

1. What kind of wastewater treatments can I engage in before the urine wastewater becomes fit for being released in the drain.
2. What kind of treatment is needed before this wastewater can be soaked/leached into the soil without affecting the soil/ water table (the water table right now is estimated to be at 130)
3. What kind of treatment is needed before I can use it for irrigation.

My intent is to dispose it off having met certain BOD,etc criteria. The urinal caters to about 1000 men or less.
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  • DaveBates
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Re: Reply: Urine Disposal

If there is urinary schistosomiasis in hte community, the answer will be different.

-- *David A. Bates*
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  • muench
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Re: Urine Disposal? - Renovating a public urinal maintained and built by a slum settlement in India

Are you going to build waterless urinals or water-flushed ones? Have you estimated how much urine would be produced at this location each day?

If you use waterless urinals you would be collecting pure urine. In my opinion it would not be advisable to try and "treat" the urine for ammonia removal as that would require quite some treatment steps (see here in the discussion forum for some information on urine treatment: forum.susana.org/urine-treatment ). Can you rather utilise the urine as a fertiliser somewhere in the area? But then how would you organise the transport of the urine?

Here in this category you can find previous discussions about urine reuse and urine infiltration:

I am pretty sure you will find some useful information there.

Where does the existing drain discharge to? Will the small amount of urine added from your urinals really make much difference in the scheme of things (with regards to surface water or groundwater pollution)? Looking at your pictures you have a whole range of problems to deal with there...


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  • shayontoni
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Re: Urine Disposal? - Renovating a public urinal maintained and built by a slum settlement in India

Thank you Elizabeth for your response!
Some information for clarity:

1. The urinals are going to have pour flush. This is however not set in stone, depending on the eventual design. There is not going to be any fixtures as such but a sloping slab. I will attach a rough sketch for your understanding.
2. Number of users - 250-300 men per day
3. Nutrient retrieval for use as fertilizer is not an option due to a) lack of land/permissions b)Space constraints
4. My intent : To meet the basic requirements of wastewater disposal before disposing it off into the city drain (which has a lot of grey water coming from the rest of the settlement). Towards this extent, I would like to understand what form of rudimentary treatment can I inculcate.

Should I look at Tertiary Treatments for disposal of Urine?
1. Constructed wetlands (Free-Water Surface Constructed Wetland,etc.) / Reed beds or Non Planted filters?
2. layers of Sand Gravel
3. layers of sawdust and hay like in the Paris Urinals

Is there something I am missing? Urine has very low BOD and Pathogen Level so I am assuming a tertiary wastewater treatment via baffled reactor or root zone treatments

Thank you for your help!
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  • AjitSeshadri
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Re: Urine Disposal? - Renovating a public urinal maintained and built by a slum settlement in India

Dear Shanyatoni.

For your initiative for remediation of 300px urine say 400lit.0.4 cbm. can proceed in suggested line as below:

- Have a holding space- tank of say 4-5 days @ 2 kl 2000lit able to drain by gravity. Urinals and tank made on elevated ground. Process flow 1:100 gradient flow
- Into next primary stage anarebobic admixed with cow dung, bio mass eucalyptus. veg market kitchn wste.
Tank for 15 dys 25-30 kl.cbm. capacity.
- 2 tanks are maintained each 25kl to alternate.
- This bio matter would reduce in size to 30% level..
- Matter ideal for vermi composting in open aerated pits.
- As the compost gets matured and prepared can be drawn to outlet zone.
- Regularly once a week the matter in finished / polished stage is removed and sun- dried.
- The above stages could be tried on a pilot scale down sized for getting confidence in the remediation process.
- 25 kl bio-matter would evolve from 4000lit.. 4 cbm compost looking like tea leaves.
- 4000 lit say 3000kgs of vermi manure can suffice for a 1 acre 4000sqm sgri- farm

- This could be evolved as appropriate at each of the sites with adaptation as required.

Well wishes.
Prof Ajit Seshadri
Vels University. Chennai.
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