Table 2 Chemical content of the different feedstocks
| Â | Cow dung (CD) | Grass silage | Maize silage | Human faeces (HF) |
|---|---|---|---|---|
Dry matter content (%) | 15 | 29.27 | 30.66 | 18.40 |
Moisture content (%) | 85 | 70.73 | 69.34 | 81.6 |
Volatile solid contents (%) | 88 | 87.00 | 92.46 | 81.00 |
Carbon (%) | 51.28 | 46.02 | 42.10 | 46.13 |
Hydrogen (%) | 6.83 | 6.37 | 5.69 | 6.43 |
Oxygen (%) | 30.28 | 44.32 | 48.45 | 35.51 |
Nitrogen (%) | 3.12 | 2.34 | 1.57 | 5.03 |
Sulphur (%) | 0.24 | 0.06 | 0.00 | 0.00 |
%Phosphorus | 5.50 | 0.30 | 0.71 | 3.45 |
%Potassium | 2.75 | 0.59 | 1.47 | 3.45 |
Molar Ratio C/N | 19.18 | 22.94 | 31.28 | 10.70 |
Energy content HHV (MJ/kg) | 19.77 | 18.01 | 16.14 | 18.59 |
Gas yield m3 CH4/kg VS | 0.46 | 0.07 | 0.35 | 0.32 |