Table 2. Codified values of the variables for the experimental design. |
Run |
Aeration rate |
Agitation rate |
Impeller height |
1 |
-1 (1 vvm) |
-1 (500 rpm) |
-1 (8 cm) |
2 |
1 (3 vvm) |
-1 |
-1 |
3 |
-1 |
1 (900 rpm) |
-1 |
4 |
1 |
1 |
-1 |
5 |
-1 |
-1 |
1 (12 cm) |
6 |
1 |
-1 |
1 |
7 |
-1 |
1 |
1 |
8 |
1 |
1 |
1 |
9 |
-a (0.3 vvm) |
0 (700 rpm) |
0 (10 cm) |
10 |
a (3.7 vvm) |
0 |
0 |
11 |
0 (2.0 vvm) |
-a (370 rpm) |
0 |
12 |
0 |
a (1040 rpm) |
0 |
13 |
0 |
0 |
-a (6.7 cm) |
14 |
0 |
0 |
a (13.4 cm) |
15 |
0 |
0 |
0 |
15a |
0 |
0 |
0 |
15b |
0 |
0 |
0 |
|