Some guidance for construction of Pit latrines in flood prone areas.


Dear friends,

Can we get some suggestions on how to construct safe pit latrines in flood prone areas? As we know that pit latrines are simple to design and economic but they are very problematic during rainy season. Most of the time they create sanitation related diseases in the rainy season due to heavy rains.This is a common but serious problem in Kano plains of the Kenya. I would like to get some suggestion from you people about how to construct safe pit latrines in flood prone area so that all the problems related to these latrines can be prevented.

thank you.



lyseconcept jean Marius
what is a vacuum sewer system?
-biologique- Waste water treated by a process -biologique- rejects a treated water remaining -biologique- which is used for irrigation of any culture garden or certificate or similar biodiveristé vegetated.
Your suggestion is still in the spirit of traditional wastewater treatment completely iefficace and rejects improper water in the environment
lyseconcept jean Marius

Why when combined with a network itself is completely autonomous. the water remaining output of the process is immediately dispersed a vegetated outlet. This derneir is set according to the production of treated wastewater. A vegetable garden and a garden largely absorb all the remaining water dun habitat. Regarding the concept of a farm is the farmer who rule the need for water supply of the process. Much of treated wastewater discharged as much water and dispersed on its operations.
Saidi Ngutu
You could try eco-san or UDTT toilets raised on a concrete platform sealed and water proof and streamlined (aerodynamic) to allow easy flow of water
Edwards Hawi
I am very grateful for your comments.They provide valuable information that I will share during KISUMU WATER EXPO AND CONFERENCE 2014.For more details about the conference you can visit the website and I look forward to engaging everyone in the discussion on our facebook page or on twitter and thank you once more.
Syeda Aniqa Gul
It is common practice to design pit latrines for remote areas but during heavy reains it damage,bcz of poor fitstly we have to Iinstall standerd quality pit latrines and replace them on quaterly basis. secondly focus on regular cleaning of latrines with acid and soil that can decompose urine and dry excreta so that during rainy reason there would be minimum chances of damages
Debora Bonucci
Hello Edwards,

Please find enclosed the following publication from Loughborough University.

And as well the following publication from UNICEF

I hope it will help you.

Best regards,

Tai Ping
thank you Debora the publication from Loughborough University is very good and never read it before.
Edwards Hawi
Thank you,this information will be valuable as I prepare for my presentation during KISUMU WATER EXPO AND CONFERENCE and I will keep in touch after reviewing this.Thank you.
Anil Kumar
Dear Edward, please search "Constructing an ecosan toilet -- A film from UNICEF" on google and find this documentary film on you tube Ecosan toilets. or give me ur email id so that ican email it to you. kind regards. Anil
Edwards Hawi
Anil, thank you.You can send this information to will be valuable for sharing during KISUMU WATER EXPO AND CONFERENCE 2014 and I look forward to your email.
Anil Kumar
Dear Edwards, you can promote ECOSAN toilets in suc areas. Kind regards
grace P
Dear Anil, I would like to know more about ECOSAN toilets, please do share material with me.
Sreevidya Satish
Hello Grace

I am working in Ecosan Services Foundation. Toilets which are referred as "ecosan toilets" are actualy Urine Diversion Dehydration Toilets". These Toilets.A urine-diverting dry toilet (UDDT) is a simple, low-cost, on-site toilet that operates without water and has a divider so that the user, with little effort, can divert the urine away from the faeces. The separately collected urine and the dried faeces can be used as fertiliser in crop production. Adding wood ash, lime, dry earth, etc. after defecation helps in lowering the moisture content. Ash and lime also help to raise the pH, which enhances pathogendie-off during storage. For security, urine is stored before usage in order ensure pathogen die-off. Dried faeces material can be composted or stored and further dried before using them as soil amendment for crop product. If you want to know more about how it is been constructed, then please go to Hope this explanation is sufficient.
Anil Kumar
OK i shall share with you a documentary film, soon
Tedious Chanyowedza
Problems faced in constructing latrines in flood prone areas are the same problems faced in rocky areas where pit excavations cannot go deeper than expected depths. the pit lining is also extended some reasonable centimeters above ground level.
Nandkishore Purohit
Dear Mr Hawi,
UNICEF India had developed several designs of twin pit pour flush latrines, and I was a party to this. I think I (and several others ) may be of some help in case some more details like soil strata and type, frequency of flooding etc. are also shared. A concern is the contamination of the water table in case the soil strata is very porous eg coarse sand /gravel and especially open/shallow wells are used for drinking water without disinfection. My ID in case.
Edwards Hawi
Thank you.I will keep in touch my email is
Edwards Hawi
I will contact you for more details later.I appreciate your comments
Dineshwar Prasad Singh
Dear Edwards
I shall send details shortly.

Please send an email for the response on pit latrine in flood prone areas.

MEng (Environ.);DipAIT (Water Res. Eng.); B.Sc. Eng (Civil)
Tel: +88-02-8827789 (Land line);+88-01764 343009(Cell)
Edwards Hawi
My email is am looking forward to your email.
Greg Marsh
Hi Edwards Hawi,

There are many options available to you including the one Jean Marius is offering which sounds intriguing. I would be interested in exchanging emails with you regarding the job creation projects we do, some of which are related to sanitation. All the best.

eros Kaw
Geraldine is correct. above ground is the best. the sides should be like a dike. rise over run of 0.5 on both sides. with water proofing on the outside. inside throw in some rocks the size of soceer balls and the HRT should large. the rocks will provide geobacters.

have vents to allow methane to escape.

use them with occasional additions of saw dust.

if you can add vent fans, even better.

if you want bioaugmentation, try biosix biobuddy. only $600 and it will last 10 years.

lyseconcept jean Marius
The answer can be yes but also not.
I start with not.
I privilege the individual but especially biological cleansing for three reasons:
it gives a sense of responsibility the users of the habitat who will want to have a biological water to sprinkle their vegetable garden
it is of financial costs largely lower than that of the collective cleansing
financial damping can be done over a small period what is with dimensions social the very interesting one.
Yes but.
any connection with a collective increases the cost of general treatment of waste waters. it will also increase the cost of the palliative treatments (treatment of muds)
If the performance épuratoire of the biological process is of 98%, that of the collective is quasi worthless close to zero
certain establishments of the process can be made on the collective to precisely reduce it its costs of infrastructure and management. but that must be done with much reserve.

the individual cleansing is largely more advantageous with everyone.

lyseconcept jean Marius
It is unfortunately the problems of all the current systems of cleansing. They are not impermables. It is not with the lack of will of all the services of cleansing, but simply by their design which is limited to being receptacles without any function.
lyseconcept invented a device of treatment of the waste waters which not only has a function to him but in more this function is powerful in completely tight configuration of water infiltration coming from outside by flood, run-off.
It is the process “Biological Pit " lyseconcept of which you can get all documentation by a request made at the address enamel following:
We are already present on 19 African country but not yet at Kénia.
Another advantageous praticularity of the process “Biological Pit " lyseconcept it is that it does not produce muddy residues, thus suppirmant the obligation of draining.
The icing on the cake: The water of rejection is recycled to be used for watering of the vegetable garden, of the pleasure garden but also on a greater scale for a farm.
Edwards Hawi
Send me the information to thank you.
Rusu Ramona-Maria
Shouldn't it be combined with a vacuum sewer system?
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