Table 1 Plackett–Burman design for seven variables with the corresponding experimental values of biomass concentration
From: Media optimization for economic succinic acid production by Enterobacter sp. LU1.
Run | Crude glycerol | Urea | MgCO3 | MgSO4 × 7H2O | CaCl2 | K2HPO4 | NaCl | Biomass (g/L) |
|---|---|---|---|---|---|---|---|---|
1 | −1 | −1 | −1 | +1 | +1 | +1 | −1 | 1.10 ± 0.02 |
2 | +1 | −1 | −1 | −1 | −1 | +1 | +1 | 1.48 ± 0.01 |
3 | −1 | +1 | −1 | −1 | +1 | −1 | +1 | 1.32 ± 0.03 |
4 | +1 | +1 | −1 | +1 | −1 | −1 | −1 | 4.63 ± 0.1 |
5 | −1 | −1 | +1 | +1 | −1 | −1 | +1 | 1.08 ± 0.01 |
6 | +1 | −1 | +1 | −1 | +1 | −1 | −1 | 1.45 ± 0.01 |
7 | −1 | +1 | +1 | −1 | −1 | +1 | −1 | 1.42 ± 0.04 |
8 | +1 | +1 | +1 | +1 | +1 | +1 | +1 | 8.03 ± 0.22 |