Table 2.
Box–Behnken optimization design and measured response.
| Trial no. | Factor |
Response OD6001 | ||
|---|---|---|---|---|
| X1/(x1) | X2/(x2) | X3/(x3) | ||
| 1 | 5/(+1)2 | 10/(+1) | 42/(0) | 26.70 |
| 2 | 2.5/(0) | 5/(0) | 42/(0) | 24.70 |
| 3 | 5/(+1) | 5/(0) | 60/(+1) | 35.60 |
| 4 | 2.5/(0) | 0/(−1) | 24/(−1) | 10.20 |
| 5 | 2.5/(0) | 5/(0) | 42/(0) | 23.20 |
| 6 | 2.5/(0) | 10/(+1) | 60/(+1) | 33.30 |
| 7 | 0/(−1) | 0/(−1) | 42/(0) | 10.50 |
| 8 | 2.5/(0) | 0/(−1) | 60/(+1) | 21.20 |
| 9 | 2.5/(0) | 5/(0) | 42/(0) | 20.50 |
| 10 | 0/(−1) | 5/(0) | 24/(−1) | 12.10 |
| 11 | 0/(−1) | 10/(+1) | 42/(0) | 16.20 |
| 12 | 2.5/(0) | 10/(+1) | 24/(−1) | 13.75 |
| 13 | 5/(+1) | 5/(0) | 24/(−1) | 14.65 |
| 14 | 5/(+1) | 0/(−1) | 42/(0) | 11.40 |
| 15 | 2.5/(0) | 5/(0) | 42/(0) | 24.00 |
| 16 | 0/(−1) | 5/(0) | 60/(+1) | 22.20 |
X1 = (NH4)2SO4 (g·L−1);X2 = CMz (g·L−1);X3 = time (h).
1
Data represent the average ± SD of three independent experiment.
2
Numbers between brackets are the coded values of the variables.