Table 2 NaOH-catalyzed steam pretreatment conditions, composition of pretreated biomass, and enzymatic digestibility
From: Optimization of NaOH-catalyzed steam pretreatment of empty fruit bunch
No. | Temp. (°C) | Time (min) | Concentration of NaOH soaked (%) | Solid remaining (%) | Waste liquor (ml) | Composition of pretreated EFB (%) | Recovery (%) | Enzymatic digestibility (%) | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
C6 (glucan) | C5 (xylan) | Lignin | C6 (glucan) | C5 (xylan) | |||||||
1 | 127 | 8 | 3.0 | 73.5 | 175 | 46.5 | 29.1 | 18.4 | 87.0 | 83.3 | 77.7 |
2 | 140 | 6 | 3.0 | 74.3 | 255 | 48.6 | 29.7 | 19.0 | 92.0 | 85.8 | 73.1 |
3 | 140 | 8 | 1.5 | 81.3 | 150 | 44.9 | 28.3 | 19.8 | 93.0 | 89.6 | 63.4 |
4 | 140 | 10 | 4.5 | 66.8 | 244 | 52.6 | 29.5 | 17.0 | 89.5 | 76.6 | 86.5 |
5 | 160 | 6 | 4.5 | 63.8 | 360 | 56.0 | 28.8 | 14.6 | 91.0 | 71.5 | 89.7 |
6 | 160 | 10 | 1.5 | 77.3 | 350 | 45.0 | 27.0 | 21.4 | 88.6 | 81.1 | 61.7 |
7 | 160 | 4 min 40 sec | 3.0 | 70.7 | 335 | 53.1 | 27.5 | 16.1 | 95.5 | 75.5 | 80.1 |
8 | 160 | 8 | 0.5 | 80.0 | 255 | 43.9 | 25.0 | 22.1 | 89.5 | 77.9 | 46.3 |
9 | 160 | 11 min 20 sec | 3.0 | 68.0 | 430 | 53.7 | 29.4 | 14.3 | 93.1 | 77.7 | 88.8 |
10 | 160 | 8 | 5.5 | 54.5 | 410 | 56.4 | 25.4 | 15.8 | 77.8 | 51.6 | 93.5 |
11 | 160 | 8 | 3.0 | 60.1 | 365 | 52.7 | 26.7 | 15.7 | 80.2 | 63.5 | 83.8 |
12 | 160 | 8 | 3.0 | 70.2 | 375 | 50.1 | 28.2 | 16.6 | 89.5 | 76.9 | 87.8 |
13 | 160 | 8 | 3.0 | 69.3 | 400 | 54.5 | 30.1 | 15.2 | 96.2 | 81.1 | 84.1 |
14 | 180 | 6 | 1.5 | 74.0 | 504 | 49.9 | 28.7 | 18.8 | 94.1 | 82.5 | 62.2 |
15 | 180 | 8 | 4.5 | 61.2 | 446 | 58.7 | 28.8 | 13.3 | 91.4 | 68.6 | 89.6 |
16 | 180 | 10 | 3.0 | 65.7 | 515 | 56.4 | 29.9 | 14.0 | 94.4 | 76.5 | 87.3 |
17 | 193 | 8 | 3.0 | 63.8 | 480 | 58.0 | 27.0 | 13.8 | 94.3 | 67.0 | 80.7 |