In the end, the ventilation tube and the toilet seat can be put. Now the traditional pit latrine is up-graded into a real UDDT. In the future it will be much safer to be emptied for manual toilet emptiers because at the time of emptying the faeces stored in the pit will not be liquid any more and nearly completely discomposed and sterilized, and there will be no more toxic gaseous emissions of ammonia during the emptying and no immissions of toxic nitrate into the aquifer during the storage of the feaces innthe next 2 to 3 years.