Table 1 Commercial enzyme benchmarks for release of Glc and Xyl from 15 pretreatment/feedstock combinations*
Feedstock | Pretreatment | Glc release (%) | Xyl release (%) | ||||
|---|---|---|---|---|---|---|---|
| Â | Â | No enzyme | Spezyme CP | Accellerase 1000 | No enzyme | Spezyme CP | Accellerase 1000 |
Corn stover | AFEX | 1.0 ± 0.0 | 44.0 ± 0.0 | 50.6 ± 0.3 | 1.2 ± 0.0 | 34.4 ± 0.5 | 30.0 ± 0.6 |
|  | 0.25% NaOH | 1.1 ± 0.0 | 40.7 ± 0.1 | 54.1 ± 0.3 | 1.2 ± 1.2 | 35.4 ± 0.2 | 22.9 ± 0.3 |
|  | Alk. peroxide | 0.4 ± 0.0 | 58.4 ± 0.1 | 68.6 ± 0.3 | 0.0 ± 0.0 | 49.6 ± 0.6 | 38.0 ± 0.6 |
Switchgrass | AFEX | 2.1 ± 0.0 | 22.9 ± 0.1 | 28.1 ± 0.0 | 0.0 ± 0.0 | 22.6 ± 0.7 | 23.4 ± 0.1 |
|  | 0.25% NaOH | 0.6 ± 0.1 | 16.4 ± 0.1 | 31.1 ± 0.1 | 0.0 ± 0.0 | 30.5 ± 0.2 | 23.2 ± 0.1 |
|  | Alk. peroxide | 1.4 ± 0.0 | 41.6 ± 0.4 | 50.6 ± 0.1 | 0.0 ± 0.0 | 45.1 ± 0.2 | 34.6 ± 0.3 |
Miscanthus | AFEX | 1.2 ± 0.3 | 36.2 ± 0.3 | 35.1 ± 0.0 | 0.0 ± 0.0 | 36.9 ± 1.0 | 36.8 ± 0.5 |
|  | 0.25% NaOH | 0.0 ± 0.0 | 13.0 ± 0.0 | 23.1 ± 0.3 | 0.7 ± 0.3 | 27.8 ± 0.2 | 22.2 ± 0.3 |
|  | Alk. peroxide | 0.4 ± 0.1 | 37.7 ± 0.6 | 43.8 ± 0.3 | 0.8 ± 0.3 | 54.8 ± 2.2 | 42.3 ± 0.2 |
DDGS | AFEX | 0.8 ± 0.1 | 32.6 ± 0.4 | 42.6 ± 0.4 | 1.1 ± 0.7 | 5.6 ± 0.2 | 4.9 ± 1.2 |
|  | 0.25% NaOH | 1.2 ± 0.1 | 26.4 ± 0.2 | 32.0 ± 0.2 | 0.8 ± 0.1 | 3.8 ± 0.8 | 3.5 ± 0.6 |
|  | Alk. peroxide | 2.8 ± 0.1 | 31.5 ± 0.2 | 38.1 ± 0.3 | 2.1 ± 0.5 | 7.3 ± 0.6 | 6.4 ± 0.8 |
Poplar | AFEX | 2.1 ± 0.3 | 18.0 ± 0.1 | 17.6 ± 0.0 | 0.0 ± 0.0 | 21.3 ± 0.8 | 21.5 ± 0.3 |
|  | 0.25% NaOH | 0.1 ± 0.1 | 10.3 ± 0.3 | 17.1 ± 0.4 | 0.3 ± 0.0 | 44.4 ± 0.1 | 32.3 ± 0.5 |
|  | Alk. peroxide | 0.8 ± 0.0 | 17.8 ± 0.2 | 18.0 ± 0.0 | 0.1 ± 0.1 | 43.9 ± 1.4 | 37.3 ± 0.7 |