A
Urine-diverting Dry Toilet (
UDDT) is a type of
dry toilet with
urine diversion that can be used to provide safe, affordable
sanitation in a variety of contexts worldwide. Through the separate collection of
feces (faeces) and
urine without any flush water, many advantages can be realized, such as odor-free operation and pathogen reduction by drying. While dried feces and urine harvested from UDDTs can be and routinely are used in agriculture (respectively, as a soil amender and nutrient-rich fertilizer — this practice being known as
reuse of excreta in agriculture), many UDDTs installations do not make use of any sort of recovery scheme. The UDDT is an example of a technology that can be used to achieve a
sustainable sanitation system. This dry excreta management system (or "dry
sanitation" system) is an alternative to
pit latrines and flush
toilets, especially where water is scarce, a connection to a
sewer system and centralized
wastewater treatment plant is not feasible or desired,
fertilizer and
soil conditioner are needed for agriculture, or
groundwater pollution should be minimized.