Table 4 Results of ANOVA for the 2FI model.

From: Optimization of waste biomass demineralization through response surface methodology and enhancement of thermochemical and fusion properties

ANOVA of the 2FI model

Source

Sum of squares

Degree of freedom

Mean Square

F-value

p-value

Comments

Model

705.87

6

117.64

53.49

 < 0.0001

Significant

A: Treatment time

52.28

1

52.28

23.77

0.0006

 

B: Concentration

424.86

1

424.86

193.16

 < 0.0001

 

C: Solid-to-liquid ratio

176.63

1

176.63

80.3

 < 0.0001

 

AB

25.86

1

25.86

11.76

0.0065

 

AC

12.89

1

12.89

5.86

0.036

 

BC

13.36

1

13.36

6.07

0.0334

 

Residual

22

10

2.2

   

Lack of Fit

17.82

6

2.97

2.85

0.1653

Not significant

Pure Error

4.17

4

1.04

   
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