Table 2. Factors and factor interactions used to predict biomass accumulation.
| Factor | F-value | p-value |
|---|---|---|
| Model | 89.30 | <0.0001 |
| A (temperature) | 1.91 | 0.1810 |
| B (incubation time) | 59.86 | <0.0001 |
| C (inoculum density) | 126.92 | <0.0001 |
| D (light) | 561.77 | <0.0001 |
| AD | 10.03 | 0.0045 |
| BD | 5.69 | 0.0262 |
| CD | 37.95 | <0.0001 |
| A2 | 26.65 | <0.0001 |
| B2 | 6.40 | 0.0191 |
| C2 | 40.02 | <0.0001 |
A reduced quadratic model was used to analyze the data. Factors showing a significant influence on the biomass yield were preselected by automated backward selection with a p-value threshold of 0.100. Factors with a p-value > 0.05 were removed manually, except those needed to maintain the model hierarchy. A p-value of 0.05 indicates a significance (alpha) level of 5%.