Microbial Decolorization of Triazo Dye, Direct Blue 71: An Optimization Approach Using Response Surface Methodology (RSM) and Artificial Neural Network (ANN)

Table 3

Analysis of variance (ANOVA) for the fitted quadratic polynomial model for optimization of Direct Blue 71 dye decolorization.

Source	Sum of squares	df	Mean square	F value	value prob > F
Model	2448.23	9	272.03	47.15	<0.0001	Significant
A: dye conc	278.83	1	278.83	48.33	0.0002
B: yeast extract	1465.3	1	1465.3	253.96	<0.0001
C: pH	44.18	1	44.18	7.66	0.0278
AB	95.94	1	95.94	16.63	0.0047
AC	11.76	1	11.76	2.04	0.1964
BC	23.81	1	23.81	4.13	0.0817
A^2	15.67	1	15.67	2.72	0.1433
B^2	293.16	1	293.16	50.81	0.0002
C^2	177.72	1	177.72	30.8	0.0009
Residual	40.39	7	5.77
Lack of fit	25.76	3	8.59	2.35	0.2138	Not significant
Pure error	14.63	4	3.66
Cor total	2488.62	16
					R ^2	0.9838
					Adjusted R^2	0.9629