Trials

Variables

Dye degradation (Values)

 

pH

Glucose
(g/l)

Agitation
(rpm)

Observed

Predicated

Residual

1

5.0

0.1

150.0

0.0820

0.0802

-0.0018

2

8.0

0.6

75.0

0.0665

0.0665

0.0000

3

11.0

0.1

0.0

0.0744

0.0731

-0.0012

4

13.0

0.6

75.0

0.0727

0.0716

-0.0012

5

8.0

-0.2

75.0

0.0836

0.0836

0.0000

6

8.0

0.6

75.0

0.0665

0.0665

0.0000

7

8.0

0.6

-51.1

0.0564

0.0555

-0.0009

8

8.0

0.6

75.0

0.0665

0.0665

0.0000

9

11.0

1.0

150.0

0.0661

0.0659

-0.0001

10

11.0

1.0

0.0

0.0524

0.0528

0.0004

11

5.0

0.1

0.0

0.0669

0.0671

0.0002

12

8.0

0.6

75.0

0.0685

0.0665

-0.0020

13

5.0

1.0

0.0

0.0446

0.0468

0.0022

14

8.0

0.6

201.1

0.0776

0.0775

-0.0001

15

8.0

0.6

75.0

0.0665

0.0665

0.0000

16

8.0

1.3

75.0

0.0494

0.0494

0.0001

17

3.0

0.6

75.0

0.0603

0.0615

0.0012

18

8.0

0.6

75.0

0.0655

0.0665

0.0010

19

5.0

1.0

150.0

0.0616

0.0599

-0.0017

20

11.0

0.1

150.0

0.0824

0.0862

0.0038

Table 2: Variables in Central composite design with experimental and predicted values of dye decolourisation.