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Are there any proven examples of Urine-Diverting Dry Toilet (UDDT) being successful in emergencies?


This is a question that I've been asked in the field so I wanted to share it with everyone on KnowledgePoint

2 Answers


Yes, increasingly UDDTs are being proven in emergencies however they are still not well known or commonly used in the humanitarian world. Many UDDTs don’t work for multiple reasons, so should be only implemented after an assessment with the users to see if they are open to such an intervention.

Urine and faeces are diverted using a urine diversion toilet bowl or squatting pan and are collected separately. While the urine goes into a container or jerrican (or is drained away in a soak pit if there is no re-use intention), the faeces are collected in vaults underneath the toilet seat or squatting pan, where they are stored and dried. The alternating vaults allow for prolonged storage and treatment takes place of the collected faeces in the unused vault. Separating urine also accelerates the drying process of faecal matter and reduces odor and flies. The urine, which contains the most nutrients of human excreta, can either be drained into a soak pit or collected and reused (SusAna WG8 Factsheet). For more information on UDDT’s see the Sustainable Sanitation and Water management Tool Box Example from Oxfam in Bangladesh Technical description from Oxfam Canaday, C. (2011): Simple Urine-diverting Dry Toilets (UDDTs) Built with Recycled or Readily Available Materials. Pastaza: Omaere Ethnobotanical Park.


A urine-diverting dry toilet (UDDT) is a type of dry toilet with urine diversion that can be used to provide safe, less expensive sanitation in a ramification of contexts worldwide. Thru the separate series of faces and urine with none flush water, many benefits may be found out, which include scent-loose operation and pathogen reduction through drying. whilst dried faces and urine harvested from UDDTs can be and routinely are utilized in agriculture (respectively, as a soil amended and nutrient-rich fertilizer—this practice is referred to as reuse of excreta in agriculture), many UDDTs installations do no longer employ any sort of healing scheme. There are several styles of UDDTs: the single vault kind which has only one faces vault; the double vault type which has faces vaults which can be used alternately; and the mobile or transportable UDDTs which can be a version of the single vault type and are commercially synthetic or homemade from simple materials. Some type of dry cover fabric is commonly brought to the faces vault immediately after every defecation event. The dry cowl material can be ash, sawdust, soil, sand, dried leaves, mineral lime, compost, or dried and decomposed faces amassed in a UDDT after prudent storage and remedy. The cover cloth serves to enhance aesthetics, manage flies, lessen scent and speed up the drying system.

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