Different stay types determine the partial stream separation and facilities types

The partial streams of domestic sewage

By the separation of the toilets and urinals by means of separate water drainage pipes one collects black water (toilets and urinals) and grey water (bath, kitchen, wash) separately. With new urine separating toilets and an additional water drainage pipe one can collect brown water (faeces, toilet paper and flushing water) and yellow water (undiluted urine) separately.

Temporary and permanent habitation

In the morning, the first walk after breakfast and coffee usually leads us to the toilet. The excretion of excrements AND urine are, as a rule, carried out here. The so-called morning urine is highly concentrated (what one also can see at the strong colouring - the urine of urinating through the  day is considerably less coloured). After the dinner (and coffee) another defecation is often carried out. These two toilet walks take place at home, where you also stay overnight. We call buildings for the overnight stay the object cluster of the permanent habitation. Hotels, golf hotels, settlements, hospitals and cruise ships, are sub-clusters of the permanent habitation cluster.

Thus in objects, in which people do not stay overnight, a black water with very few excrements but very much urine arise. Primarily women often refuse for hygienic reasons to sit down on public toilets. These fears are completely baseless. The toilet seats are objects contaminated very little bacterially. However, true bacteria slingshots are other objects of the daily use: Keyboards, door handles, kitchen rags and sponges as well as remote controls.

A lack of carbon (from faeces) in the black water in these buildings causes the biological treatment to become  very unstable. We call this type as an object cluster of the temporary habitation. Office buildings, restaurants, highway service areas, supermarkets and other facilities are sub-clusters of the temporary habitation cluster.