| Inoculum source | Biogas production from fresh maize (mL) | Biogas production from maize silage (mL) | Difference in biogas production with silage and fresh maize (mL) |
| Agriculture-based biogas plant | 1010 | 1838 | 838 |
| Waste water treatment plant | 107 | 101 | −6 |
| Standard Reactor | 85 | 142 | 57 |