| Potato Concentration | Potato Sample Volume (ml) | Alpha-Amylase (unit) | Fermentation Time (days) | Turbidity (OD at 610 nm) | Produced Ethanol (ml) |
| 5% | 500 ml | 1750 unit | 6 days | 0.002 | 8.0 ml |
| 10% | 500 ml | 1750 unit | 6 days | 0.002 | 15.0 ml |
| 15% | 500 ml | 1750 unit | 6 days | 0.039 | 45.0 ml |
| 20% | 500 ml | 1750 unit | 6 days | 0.001 | 65.0 ml |
| 30% | 500 ml | 1750 unit | 6 days | 0.246 | 9.4 ml |