Research Article
Optimization of the Alkaline Pretreatment of Rice Straw for Enhanced Methane Yield
Table 2
Box-Behnken design for the Ca(OH)2 pretreatment of rice straw.
| Run | Coded | Uncoded | Response | LC (%) | PT (d) | IA (%) | LC (%) | PT (d) | IA (%) | Methane yield (mL/g VS) |
| 1 | 0 | −1 | −1 | 8 | 3 | 20 | 154.0 | 2 | 0 | 1 | 1 | 8 | 11 | 50 | 200.0 | 3 | 0 | 0 | 0 | 8 | 7 | 35 | 200.0 | 4 | 1 | −1 | 0 | 12 | 3 | 35 | 156.5 | 5 | 0 | 0 | 0 | 8 | 7 | 35 | 215.1 | 6 | 1 | 0 | 1 | 12 | 7 | 50 | 190.0 | 7 | 0 | 1 | −1 | 8 | 11 | 20 | 155.9 | 8 | 0 | 0 | 0 | 8 | 7 | 35 | 207.1 | 9 | 1 | 0 | −1 | 12 | 7 | 20 | 103.6 | 10 | 0 | 0 | 0 | 8 | 7 | 35 | 228.2 | 11 | 0 | 0 | 0 | 8 | 7 | 35 | 229.0 | 12 | −1 | 0 | −1 | 4 | 7 | 20 | 167.0 | 13 | −1 | 0 | 1 | 4 | 7 | 50 | 190.0 | 14 | −1 | 1 | 0 | 4 | 11 | 35 | 167.0 | 15 | 1 | 1 | 0 | 12 | 11 | 35 | 141.1 | 16 | −1 | −1 | 0 | 4 | 3 | 35 | 190.0 | 17 | 0 | −1 | 1 | 8 | 3 | 50 | 216.1 |
|
|
LC: Ca(OH)2 concentration; PT: pretreatment time; IA: inoculum amount.
|