This system is designed to separate Urine and Faeces to allow the Faeces to dehydrate and/or recover the Urine for beneficial use. Inputs to the system can include Faeces, Urine, Anal Cleansing Water and Dry Cleansing Materials.
The main User Interface technology for this system is the [[Urine Diverting Dry Toilet | Urine-Diverting Dry Toilet ]] (UDDT, U.2), which allows Urine and Faeces to be separately collected. A Urinal (U.3) can additionally be installed for the effective collection of Urine. Different UDDT designs exist for different preferences (e.g., models with a third diversion for Anal Cleansing Water).
[[Dehydration Vaults | Dehydration Vaults]] (S.7) are used for the Collection and Storage/Treatment of Faeces. When storing the Faeces in vaults, they should be kept as dry as possible to encourage dehydration and pathogen reduction. Therefore, the chambers should be watertight and care should be taken to ensure that no water is introduced. Anal Cleansing Water should never be put into Dehydration Vaults, but it can be diverted and discharged into a [[Soak Pit |Soak Pit ]] (D.7). Also important is a constant supply of ash, lime, soil, or sawdust to cover the Faeces. This helps to absorb humidity, minimize odours and provide a barrier between the Faeces and potential vectors (flies). If ash or lime are used, the related pH increase will also help to kill pathogenic organisms.
For the Collection and Storage/Treatment of Urine, [[Storage tanks | Storage Tanks ]] (S.1) are used. Alternatively, Urine can also be diverted directly to the ground through an [[Irrigation | Irrigation system ]] (D.6) or infiltrated through a [[Soak Pit | Soak Pit]] (D.7). Stored Urine can be easily handled and poses little risk because it is nearly sterile. With its high nutrient content it can be used as a good liquid fertilizer.Stored Urine can be transported for Application in agriculture (D.2) using either [[Jerrycan - tank | Jerrycans ]] or a Tank (C.1), or a [[Motorized Emptying and Transport | Motorized Emptying and Transport technology ]] (C.3) – the same way that bulk water or Sludge is transported to fields.
Human-Powered Emptying and Transport (C.2) is required for the removal and Conveyance of the Dried Faeces generated from the [[Dehydration Vaults| Dehydration Vaults]]. The alternating use of double Dehydration Vaults allows for an extended dehydration period so that the Dried Faeces pose little human health risk when they are removed. A minimum storage time of 6 months is recommended when ash or lime are used as cover material. The Dried Faeces can then be applied as soil conditioner (D.3). If there are concerns about the quality of the material, it can be further composted in a dedicated composting facility before it is used. If there is no use for the product, it can be temporarily stored or permanently disposed of (D.12).
===Considerations===
