S.No
Variable
Parameter
Codedand actual Level
-1
0
1
1
X
1
Ammonium sulphate(g/l)
0.2
0.4
0.6
2
X
2
Magnesium (g/l)
0.05
0.15
0.25
3
X
3
EDTA (g/l)
0.2
0.4
0.6
4
X
4
KH
2
PO
4
(g/l)
2
2.5
3
Table 1:
Coded Values used in Box-Behnken design to optimize the chemical parameters for citric acid production.
