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{|width="100%"
|style="width:50%;"|{{santable_new|
sys7=|
sys8=|
sys9=|
pic=Dehydration_vaults.png|
ApplHousehold=XX|
Input1=Faeces |Input2=Dry Cleansing Materials| Organics |Input3=|Input4=|Input5=|
Output1=Dried Faeces |Output2= | Output3= | Output4= | Output5=
}}
|[[Image:Dehydration_vaults.png |right|300px500px]]
|}
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[[Image:Vaults_and_chambers.PNG|thumb|right|200px|[[Vaults and chambers |Dy]], in South Africa(for credits, click the picture)]]
When faeces are not mixed with urine and other liquids, they dry quickly. In the absence of moisture, organisms cannot grow, pathogens are destroyed and smells minimized. The use of two alternating vaults allows the faeces to dehydrate in one vault while the other vault fills. When one vault is full, the [[Urine Diverting Dry Toilet | Urine-Diverting Dry Toilet]] (UDDT, U.2) is moved to the second vault. While the second vault fills up, the faeces in the first vault dry and decrease in volume. When the second vault is full, the first one is emptied and put back into service. To prevent flies, minimize odours and encourage drying, a small amount of ash, lime, dry soil or sawdust should be used to cover faeces after each use.
===Design Considerations===
===References===
* Deegener, S., Samwel, M. and Gabizon, S. (2006). [https://www.susana.org/en/knowledge-hub/resources-and-publications/library/details/430 Urine Diverting Toilets. Principles, Operation and Construction]. Women in Europe for a Common Future, Utrecht, NL and Munich, DE.:Available at: * Rieck, C., von Münch, E. and Hoffmann, H. (2012). [httphttps://www.wecfsusana.de wecforg/en/knowledge-hub/resources-and-publications/library/details/874 Technology Review of Urine-Diverting Dry Toilets (UDDTs)].de] (Photos and explanation Overview of how to build a double vault Design, Operation, Management and superstructureCosts. Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ)GmbH, Eschborn, DE.
* RieckWinblad, C., von Münch, EU. and HoffmannSimpson-Hébert, HM. (2012)Eds. Technology Review of Urine-Diverting Dry Toilets (UDDTs). Overview of Design, Operation, Management and Costs. Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ2004) GmbH, Eschborn, DE.:Available at: [http://www.susanaecosanres.org/library susanapdf_files/Ecological_Sanitation_2004.pdf Ecological Sanitation.org/libraryRevised and Enlarged Edition]. Stockholm Environment Institute, Stockholm, SE. (A general description of various designs and adaptations, especially Chapter 3)
* Winblad, U. and Simpson-Hébert, M. WHO (Eds.) (20042006). Ecological Sanitation. Revised and Enlarged Edition. Stockholm Environment Institute, Stockholm, SE.:Available at: [httphttps://www.ecosanreswho.org ecosanresint/water_sanitation_health/publications/gsuweg4/en/ Guidelines for the Safe Use of Wastewater, Excreta and Greywater.orgVolume 4: Excreta and Greywater Use in Agriculture] (A general description of various designs and adaptations. World Health Organization, Geneva, especially Chapter 3)CH.
* WHO (2006). Guidelines for the Safe Use of Wastewater, Excreta and Greywater. Volume 4: Excreta and Greywater Use in Agriculture. World Health Organization, Geneva, CH.:Available at: [http://www.who.int who.int/water_sanitation_health/publications/guidelines-on-sanitation-and-health/en/ WHO: Guidelines on sanitation and health - 2018]
===Acknowledgements===
{{:Acknowledgements Sanitation}}
