Table 2: Three levels of filtrating process for each factor.
Factors |
Low level |
Middle level |
High level |
X_{11} |
200 (M^{3}/Hr) |
220 (M^{3}/Hr) |
240 (M^{3}/Hr) |
X_{12} |
10(Kg/each time) |
20 (Kg/each time) |
30 (Kg/each time) |
X_{13} |
15(Kg/each time) |
20 (Kg/each time) |
25 (Kg/each time) |
X_{14} |
20 (minutes) |
30 (minutes) |
40 (minutes) |