Research Article
Optimization of Lactic Acid Production from Pineapple By-Products and an Inexpensive Nitrogen Source Using Lactiplantibacillus plantarum strain 4O8
Table 2
Definitive plan design (real and coded values) with the respective results.
| No. | Independent variables | Lactic acid (g/l) | | | | | | | | | Experimental values | Predicted values |
| 1 | 0.6 (1) | 0.025 (0) | 45 (1) | 0 (-1) | 0.8 (1) | 0 (-1) | 0 (-1) | 500 (1) | 1.11 ± 0.01 | 1.11 | 2 | 0 (-1) | 0 (-1) | 45 (1) | 0 (-1) | 0 (-1) | 0.8 (1) | 30 (0) | 500 (1) | 1.11 ± 0.00 | 1.05 | 3 | 0.6 (1) | 0 (-1) | 30 (-1) | 0.05 (1) | 0.4 (0) | 0.8 (1) | 0 (-1) | 500 (1) | 9.41 ± 0.00 | 9.59 | 4 | 0.6 (1) | 0 (-1) | 45 (1) | 0.05 (1) | 0 (-1) | 0 (-1) | 60 (0) | 300 (0) | 1.13 ± 0.00 | 1.39 | 5 | 0.3 (0) | 0.025 (0) | 37.5 (0) | 0.025 (0) | 0.4 (0) | 0.4 (0) | 30 (0) | 300 (0) | 11.79 ± 0.00 | 10.71 | 6 | 0 (-1) | 0 (-1) | 45 (1) | 0.05 (1) | 0.8 (1) | 0.4 (0) | 0 (-1) | 100 (-1) | 0.90 ± 0.05 | 0.95 | 7 | 0 (-1) | 0.05 (1) | 30 (-1) | 0 (-1) | 0.8 (1) | 0.8 (1) | 0 (-1) | 300 (0) | 5.49 ± 0.01 | 4.79 | 8 | 0 (-1) | 0 (-1) | 30 (-1) | 0.025 (0) | 0.8 (1) | 0 (-1) | 60 (1) | 500 (1) | 12.94 ± 0.02 | 13.65 | 9 | 0.6 (1) | 0 (-1) | 37.5 (0) | 0 (-1) | 0.8 (1) | 0.8 (1) | 60 (1) | 100 (-1) | 11.48 ± 0.03 | 12.19 | 10 | 0.6 (1) | 0.05 (1) | 30 (-1) | 0 (-1) | 0 (-1) | 0.4 (0) | 60 (1) | 500 (1) | 15.41 ± 0.05 | 14.96 | 11 | 0 (-1) | 0.05 (1) | 45 (1) | 0 (-1) | 0.4 (0) | 0 (-1) | 60 (1) | 100 (-1) | 0.35 ± 0.02 | 0.025 | 12 | 0.6 (1) | 0.05 (1) | 45 (1) | 0.025 (0) | 0 (-1) | 0.8 (1) | 0 (-1) | 100 (-1) | 0.47 ± 0.02 | 0.54 | 13 | 0.3 (0) | 0.05 (1) | 45 (1) | 0.05 (1) | 0.8 (1) | 0.8 (1) | 60 (1) | 500 (1) | 1.88 ± 0.03 | 1.88 | 14 | 0.3 (0) | 0 (-1) | 30 (-1) | 0 (-1) | 0 (-1) | 0 (-1) | 0 (-1) | 100 (-1) | 3.35 ± 0.03 | 4.31 | 15 | 0 (-1) | 0.025 (0) | 30 (-1) | 0.05 (1) | 0 (-1) | 0.8 (1) | 60 (1) | 100 (-1) | 11.36 ± 0.00 | 11.37 | 16 | 0.6 (1) | 0.05 (1) | 30 (-1) | 0.05 (1) | 0.8 (1) | 0 (-1) | 30 (0) | 100 (-1) | 10.73 ± 0.02 | 9.99 | 17 | 0 (-1) | 0.05 (1) | 37.5 (0) | 0.05 (1) | 0 (-1) | 0 (-1) | 0 (-1) | 500 (1) | 10.58 ± 0.02 | 10.94 |
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(-1), (0), and (1) are coded levels.
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