Expected nutrients from one person

Need for fertilisers
Fertiliser
Expected nutrients from one person


Faecal volume depends on diet and increases with the consumption of fibers and vegetables.
An average person’s excreted mass is 30-60 kilos of faeces per year. Urine volume is dependent on water intake and levels of perspiration due to manual movement and surrounding temperature. 1.5 liters is considered an average quantity per day.
Both urine and faeces are rich in nutrients. Furthermore, faeces, if applied to the soil, increase the organic matter content and improve the water-holding capacity.

Expected nutrients 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 fertilizer.
Usage of one Peepoo per day adds an additional 1.5 kg urea per year.