Urine diversion

[1]: 9  Applications are typically found where connection to a sewer-based sanitation system is not available or areas where water supplies are limited.

[2] In a UDDT, the urine is drained via a basin with a small hole near the front of the user interface, while feces fall through a larger drop-hole at the rear.

Separate treatment of the two types of waste is justified since urine is nearly sterile and low in pathogens, provided an individual is healthy.

[4] Human feces, on the other hand are high in pathogens, including up to 120 viruses and need to be treated well before it can be safely used in agriculture.

Ash and/or sawdust are usually added to the feces chamber of a UDDT to speed the composting process.

[6] Whether the feces are handled on site or hauled to another location, the weight and volume of material is reduced by separating out urine.

[8]: 8 Urine diversion flush toilets have been manufactured in two main countries: Germany and Sweden.

[11] Likewise, the Swedish company Gustavsberg stopped selling their urine diversion flush model in about 2011.

In Sweden, urine diversion flush toilets are still supplied by two manufacturers, Dubbletten and Wostman, which continue to sell their urine diversion systems today primarily for installation in summer houses in rural and semi-rural areas.