Table 2.
Analysis of variance table (ANOVA) for response surface methodology of main effects and interacting effects of parameters in quadratic model for the dye degradation by Hypocrea lixii
| Source | Sum of squares | df | Mean square | F value | p-value Prob > F |
|---|---|---|---|---|---|
| Model | 42482.83 | 14 | 3034.488 | 20.09046 | < 0.0001*** |
| X1-Temperature (°C) | 22.77126 | 1 | 22.77126 | 0.150762 | 0.7033NS |
| X2-pH | 18.41882 | 1 | 18.41882 | 0.121946 | 0.007318** |
| X3-Yeast extract (g L-1) | 0.069738 | 1 | 0.069738 | 0.000462 | 0.9831NS |
| X4-Incubation period (days) | 36055.94 | 1 | 36055.94 | 238.7159 | < 0.0001*** |
| X1X2 | 0.16657 | 1 | 0.16657 | 0.001103 | 0.009739** |
| X1X3 | 0.278689 | 1 | 0.278689 | 0.001845 | 0.9663NS |
| X1X4 | 0.085404 | 1 | 0.085404 | 0.000565 | 0.9813NS |
| X2X3 | 0.081467 | 1 | 0.081467 | 0.000539 | 0.009818** |
| X2X4 | 0.040612 | 1 | 0.040612 | 0.000269 | 0.9871NS |
| X3X4 | 0.075826 | 1 | 0.075826 | 0.000502 | 0.9824NS |
| X1 2 | 298.9977 | 1 | 298.9977 | 1.979577 | 0.1798NS |
| X2 2 | 320.0991 | 1 | 320.0991 | 2.119283 | 0.1661NS |
| X3 2 | 118.8562 | 1 | 118.8562 | 0.786912 | 0.3890NS |
| X4 2 | 12614.69 | 1 | 12614.69 | 83.51817 | < 0.0001*** |
| Residual | 2265.618 | 15 | 151.0412 | ||
| Lack of Fit | 1851.681 | 9 | 205.7423 | 2.982222 | 0.0984NS |
| Pure Error | 413.9376 | 6 | 68.9896 | ||
| Cor Total | 44748.45 | 29 |
Statistically significant ***(P <0.0001), **(P < 0.01), NS Non-significant.