Table 1.
Chemical compositions of vine-shoots waste and solid yield and chemical compositions of autohydrolysed vine-shoot waste obtained at 165 °C and 180 °C.
| Temperature (°C) | Sauvignon Blanc | Pinot Noir | Feteasca Regala | Busuioaca de Bohotin | Muscat Ottonel | Cabernet Sauvignon | Feteasca Neagra | Feteasca Alba |
|---|---|---|---|---|---|---|---|---|
| Solid yield (% of raw material, dry biomass) | ||||||||
| 165 °C | 63.9 ± 7.6 | 62.6 ± 7.5 | 71.0 ± 8.0 | 70.2 ± 8.4 | 60.3 ± 6.6 | 65.3 ± 7.1 | 62.2 ± 6.7 | 66.2 ± 7.2 |
| 180 °C | 57.3 ± 6.8 | 56.04 ± 6.7 | 64.3 ± 7.7 | 68.6 ± 7.9 | 52.3 ± 5.7 | 56.1 ± 6.2 | 57.6 ± 6.3 | 59.3 ± 6.5 |
| Compositions of solid fraction resulted at 165 °C (% of autohydrolyzed biomass, dry biomass) | ||||||||
| Cellulose | 53.0 ± 6.3 | 57.0 ± 5.8 | 55.3 ± 6.6 | 56.0 ± 5.9 | 49.3 ± 5.9 | 57.3 ± 6.8 | 51.3 ± 6.1 | 51.9 ± 6.2 |
| Hemicelluloses | 1.0 ± 0.1 | 1.0 ± 0.1 | 1.0 ± 0.1 | 1.5 ± 0.1 | 1.2 ± 0.1 | 1.3 ± 0.1 | 1.6 ± 0.1 | 1.0 ± 0.1 |
| Lignin | 45.0 ± 5.4 | 41.0 ± 4.0 | 43.2 ± 5.1 | 40.7 ± 4.8 | 36.3 ± 4.3 | 32.4 ± 3.8 | 41.3 ± 4.3 | 42.6 ± 5.1 |
| Solid compositions | 99.0 ± 9.3 | 99.0 ± 8.0 | 99.5 ± 8.4 | 98.1 ± 9.1 | 86.8 ± 9.6 | 91.0 ± 9.5 | 94.2 ± 7.8 | 95.5 ± 8.6 |
| Compositions of solid fraction resulted at 180 °C (% of autohydrolyzed biomass, dry biomass) | ||||||||
| Cellulose | 49.0 ± 5.8 | 53.0 ± 6.0 | 51.3 ± 5.4 | 52.0 ± 4.8 | 45.3 ± 5.4 | 53.3 ± 6.0 | 47.3 ± 5.6 | 47.9 ± 5.2 |
| Hemicelluloses | - | - | 0.1 ± 0.0 | 0.2 ± 0.01 | - | - | 0.1 ± 0.0 | 0.1 ± 0.0 |
| Lignin | 41.0 ± 4.9 | 37.0 ± 4.4 | 39.2 ± 4.5 | 36.7 ± 3.8 | 32.3 ± 3.8 | 28.4 ± 3.0 | 37.3 ± 4.3 | 38.6 ± 3.5 |
| Solid compositions | 90.0 ± 9.8 | 90.0 ± 8.6 | 90.6 ± 7.6 | 88.8 ± 8.7 | 77.6 ± 7.5 | 81.7 ± 9.8 | 84.7 ± 8.6 | 86.6 ± 7.6 |
Data represents mean ± standard deviation, n = 3.