A Comparison of Central Composite Design and Taguchi Method for Optimizing Fenton Process

Table 8

Response table for signal to noise (/) ratio.

Level	Dye	Dye : Fe^+2 (wt/wt)	H2O2 : Fe^+2 (wt/wt)	pH
COD removal
1	34.72	35.06	33.87	37.96
2	33.84	34.75	34.12	34.77
3	34.94	33.69	35.52	30.77
Delta	1.10	1.37	1.65	7.19
Rank	4	3	2	1
Decolorization
1	39.59	39.45	39.63	39.94
2	39.28	39.76	39.42	39.75
3	39.84	39.49	39.65	39.01
Delta	0.56	0.32	0.23	0.93
Rank	2	3	4	1