Number of people in the family | Biogas requirements for cooking and lighting (m³) | Volume of digester required (m³) | Number of oxen required in semi-stabling (heads) |
Up to 4 people | 1 | 4 | 3 to 4 |
5 to 6 people | 1.5 | 6 | 4 to 5 |
7 to 9 people | 2.25 | 8 | 6 to 8 |
10 - 11 people | 2.75 | 10 | 9 to 10 |
12 - 13 people | 3.25 | 12 | 10 to 12 |
14 - 15 people | 3.75 | 14 | 12 to 14 |
16 - 18 people | 4.5 | 16 | 14 to 16 |
19 - 20 people | 5 | 18 | 16 to 18 |