Ecological Sanitation

How is the use of ecological sanitation used in agriculture?
A human being almost produces the amount of nutrients that is needed for growing his or her food. If separated, urine can easily serve as a fertiliser and faeces after hygienization as a soil conditioner for agriculture, returning a significant part of the nutrients and trace elements to the soil.
Source: Werner, Ch., Mang H.-P., Klingel, F. Bracken, P. (2004): General overview of ecosan. PowerPoint-Presentation. Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ) GmbH ecological sanitation programme.
The human excreta which is rich in organic matter and nutrients, mostly Nitrogen and Phosphorus, can be collected, treated (for instances, through composting) and applied directly as fertiliser and soil conditioner in agriculture.
Urine is generally believed to contain more nutrients than faeces and requires less time for treatment (by storage) as faeces. Urine is rich and typically contains more than 50% of the Nitrogen, Phosphorus and Potassium content of whole human waste, therefore it is widely considered as good as or even better than commercially-available chemical fertilisers or stabilised sludge from sewage plants. Urine can be either applied directly in farming as nutrient enrichment, or as part of composting to increase the Nitrogen content, aid the composting process and increasing its final nutrient values.
The remaining treated greywater may be used for irrigation and also for recharging the local aquifer, closing local cycles, helping to improve food security and to conserve soil fertility.
 
 
Definition of ecological sanitation
What is sanitation?
How is the use of ecological sanitation used in agriculture?