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Chemical Composition of Human Dejecta
Source: Rodale, Gotaas composting, as quoted by François Tanguay, in Petit manuel d'auto-construction, p.230, editions de Mortagne
| Solid material without urine | ||
| Approximate quantity : | 150 to 300 g of moist matter produced per day per person | |
| Approximate composition : | Moisture | 66 - 68 % |
| In dry matter : | Organic compounds | 88 - 97 % |
| Nitrogen | 5 - 7 % | |
| 3 - 5 % | ||
| Potassium (K2O) | 1 - 2.5 % | |
| Carbon | 40 -55 % | |
| Calcium (CaO) | 4 - 5 % | |
| Report C/N | 5 - 10 | |
| Human Urine | ||
| Volume
: | 1 to 1.3 litre per day per person | |
| Dry matter : | 50 to 70 g per day per person | |
| Approximate composition : | Moisture | 93 - 96 % |
| In dry matter : | Organic compounds | 65 - 85 % |
| Nitrogen | 15 - 19 % | |
| Phosphorus (P2O5) | 2.5 - 5 % | |
| Potassium (K2O) | 3 - 4.5 % | |
| Carbon | 11 - 17 % | |
| Calcium (CaO) | 4.5 - 6 % | |
| Nitrogen Contents | ||
|
Fecal Matter : | 5.4 g (35%) | |
| Urine : | 10.2 g (65%) | |