Table 1 ANOVA table of the model describing the sugar release as a linear function of the selected coefficients for EA samples
From: Optimization of biomass pretreatments using fractional factorial experimental design
Source | Sum of squares | Degrees of freedom | Mean square | F value | P value |
|---|---|---|---|---|---|
Regression | 20,497 | 10 | 2049.70 | 87.95 | 4.49E−07 |
A-ball mill time | 270.6025 | 1 | 270.60 | 11.61 | 9.26E−03 |
B-[H2SO4] step 1 | 0.7225 | 1 | 0.72 | 0.03 | 8.65E−01 |
C-[NaOH] step 2 | 17,004.16 | 1 | 17,004.16 | 729.64 | 3.80E−09 |
D-temperature step 2 | 11.2225 | 1 | 11.22 | 0.48 | 5.07E−01 |
E-time step 2 | 50.41 | 1 | 50.41 | 2.16 | 1.80E−01 |
AB | 260.8225 | 1 | 260.82 | 11.19 | 1.01E−02 |
AC | 182.25 | 1 | 182.25 | 7.82 | 2.33E−02 |
AE | 864.36 | 1 | 864.36 | 37.09 | 2.93E−04 |
CD | 1398.76 | 1 | 1398.76 | 60.02 | 5.50E−05 |
DE | 453.69 | 1 | 453.69 | 19.47 | 2.25E−03 |
Residual | 186.437895 | 8 | 23.30 | ||
Lack of fit | 181.017895 | 6 | 30.17 | 11.13 | 8.47E−02 |
Pure error | 5.42 | 2 | 2.71 | ||
Cor total | 20,683.4379 | 18 |