Table 1 Plackett–Burman design for 7 variables and 12 trials
Trial | Variable | CA (g/L) | ||||||
|---|---|---|---|---|---|---|---|---|
pH | Temperature (°C) | Inoculum quantity (%) | Rotational speed (rpm) | Fermentation period (d) | Methanol content (%) | SVH (%) | ||
1 | 6 (−1) | 44 (+1) | 15 (+1) | 125 (+1) | 5 (−1) | 6 (−1) | 10 (−1) | 1.917 |
2 | 7.5 (+1) | 44 | 12 (−1) | 125 | 6.25 (+1) | 7.5 (+1) | 10 | 1.856 |
3 | 7.5 | 44 | 12 | 100 (−1) | 5 | 7.5 | 10 | 1.755 |
4 | 7.5 | 35 (−1) | 12 | 100 | 6.25 | 6 | 12.5 (+1) | 2.072 |
5 | 7.5 | 35 | 15 | 125 | 5 | 7.5 | 12.5 | 2.050 |
6 | 6 | 35 | 12 | 125 | 5 | 7.5 | 12.5 | 2.000 |
7 | 6 | 35 | 12 | 100 | 5 | 6 | 10 | 1.784 |
8 | 6 | 44 | 12 | 125 | 6.25 | 6 | 12.5 | 2.166 |
9 | 7.5 | 35 | 15 | 125 | 6.25 | 6 | 10 | 2.105 |
10 | 6 | 44 | 15 | 100 | 6.25 | 7.5 | 12.5 | 2.057 |
11 | 6 | 35 | 15 | 100 | 6.25 | 7.5 | 10 | 2.396 |
12 | 7.5 | 44 | 15 | 100 | 5 | 6 | 12.5 | 2.004 |