Expected nutrients from one person
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Expected nutrients from one person
The faecal volyme depends on the diet and increases with consumption of fibres and vegetables.
An average person excreted mass per year is 30-60 kilo faeces a year. Urine volyme is dependent on water intake and of levels of perspiration due to manual movement and surrounding temperature. 1,5 litres are regarded to be an average quantity per day.
Both urine and faeces are rich in nutrients. Furthermore faeces if applied to the soil increases the organic matter content and improve the water-holding capacity.
Expected nutrients from from one person in Sub-Saharan Africa per year are:
Total mass
N=2.8 kg
P=0.4 kg
K=0.5 kg
Urine
N=2.46
P=0.27
K=0.37
Faeces
N=0.34
P=0.13
K=0.13
This equals 6 kg Urea, 2 kg TPs and 1 kg KCL artificial fertiliser.
Usage of one Peepoo bag per dag add an additional 1.5 kg urea per year.