Table 3 Box-Behnken design matrix and results for the most significant three variables that affected pigment production (casein (X1), KNO3 (X2), and FeSO4 (X3))
Trial | Variable | |||
|---|---|---|---|---|
X1 | X2 | X3 | Pigment production (g/L) | |
1 | 0 | 0 | 0 | 0.0467 |
2 | 0 | 0 | 0 | 0.0467 |
3 | 0 | −1 | 1 | 0.06542 |
4 | 0 | 1 | −1 | 0.06178 |
5 | −1 | −1 | 0 | 0.0368 |
6 | 0 | 0 | 0 | 0.0467 |
7 | 1 | 0 | −1 | 0.0612 |
8 | 0 | 1 | 1 | 0.0348 |
9 | 0 | −1 | −1 | 0.051 |
10 | −1 | 0 | 1 | 0.04 |
11 | −1 | 0 | −1 | 0.0374 |
12 | 1 | 0 | 1 | 0.065 |
13 | 1 | 1 | 0 | 0.0438 |
14 | 1 | −1 | 0 | 0.096 |
15 | −1 | 1 | 0 | 0.0572 |