Is it necessary to separate urine from faeces?
The ammonia problem
Stored urine is rapidly converted into ammonia. If it seeps into groundwater, it will cause nitrite and nitrate pollution.
In addition, it is recommended not to use it pure, but to dilute it in 10 volumes of water.
This calls into question the conservation of water resources expected with the use of a dry toilet.
It would also be advisable not to spread it all the time and to do so over a minimal area.
However, an adult urinates between 1 and 1.5 liters per day. This means storing urine or having a large surface area to spread.
The question arises as to how to store urine, and its rapid transformation into ammonia. And what to do with this ammonia, which is problematic in the soil and harmful to groundwater.