Table 2. Yields of crop, biogas (V(CH4)/m(VS))/(m3/kg) and energy obtained from different energy crops (15, 34).
| Feedstock | Y(crop)/(t/ha) |
Y(biogas)/ (m3/kg) |
Y(energy)/(GJ/ha) |
|---|---|---|---|
| alfalfa | 7.50-16.50 | 340-500 | 82-266 |
| barley | 3.60-4.10 | 353-658 | 41-87 |
| flax | 5.50-12.50 | 212 | 38-85 |
| Jerusalem artichoke | 9-16 | 300-370 | 87-191 |
| kale* | 240-334 | 6-45 | 46-484 |
| leaves of sugar beet* | 9.20-18.40 | 0.40-0.80 | 70-226 |
| Miscanthus | 8-25 | 179-218 | 46-176 |
| oats (grain) | 4.10-12.40 | 283-492 | 33-146 |
| oilseed rape | 2.50-7.80 | 240-340 | 19-85 |
| rhubarb | 2-4 | 320-490 | 21-63 |
| sugar beet* | 9.20-18.40 | 0.40-1 | 70-226 |
| sunflower | 6-8 | 154-400 | 30-103 |
| triticale | 3.30-11.90 | 337-555 | 36-213 |
| wheat (grain) | 3.60-11.75 | 384-426 | 45-161 |
*Y(biogas)=(V(CH4)/m(dry matter))/(m3/kg), VS=volatile solid