282
D. Brahma and D. Dutta
Table 1 Optimization using CCD in RSM for MG removal in continuous mode
Run Factor A:
Alginate
concentration (g
ml −1 )
Factor B: Bed
height(cm)
Factor C: Flow
rate (ml min −1 )
Factor D: Initial
MG
concentration
(mg l −1 )
Response:
Removal %
1
2.5
10
0.5
50
98.14
2
3
12.5
0.75
60
97.97
3
3
12.5
0.25
40
97.11
4
2.5
10
0.5
30
97.4
5
3
12.5
1.25
40
96.66
6
3.5
10
0.5
50
98.2
7
3
12.5
0.75
40
98.29
8
3
12.5
0.75
40
98.37
9
2.5
15
1
30
97.56
10
3
7.5
0.75
40
98.47
11
3.5
10
1
50
96.81
12
2.5
15
1
50
98.04
13
3.5
10
1
30
98.8
14
3.5
15
1
50
96.58
15
3
12.5
0.75
20
98.39
16
2.5
15
0.5
50
98.25
17
2
12.5
0.75
40
98.54
18
3.5
15
1
30
97.8
19
3
12.5
0.75
40
98.23
20
3
12.5
0.75
40
98.3
21
4
12.5
0.75
40
98.45
22
3.5
10
0.5
30
98.7
23
3.5
15
0.5
30
98.1
24
3
12.5
0.75
40
98.2
25
2.5
15
0.5
30
96.51
26
3.5
15
0.5
50
98.38
27
2.5
10
1
50
98.55
28
3
12.5
0.75
40
98.22
29
2.5
10
1
30
98.69
30
3
17.5
0.75
40
97.64
MG Malachite green