Variables Optimum values Optimum  phenol degradation (%)
Experimental Predicted
Glucose concentration (gL-1), (X1) 0.8229   98.24   98.26
(NH4)2SO4  (gL-1),  (X2) 1.5183
Metal ion concentration
(Mn2+) (gL-1), (X3)
0.0195
Table 5: Experimental and predicted values of nutritional parameters for optimum phenol degradation (%).