Optimization of Electrochemical Treatment Process Conditions for Distillery Effluent Using Response Surface Methodology

Table 3

Experimental design, observed yields in BBD experiments in terms of percentage removal of COD and color.

Run	pH	Electrolysis time (min)	Current density (mA/cm^2)	Electrolyte concentration (g/L)	COD removal (%)	Color removal (%)
1	5	90	20	1.5	84.54	89.22
2	3	90	35	1.5	85.56	92.18
3	5	120	35	1.5	83.86	83.32
4	5	90	35	1.0	76.52	86.27
5	1	90	20	1.5	76.22	60.47
6	5	90	35	2.0	87.22	92.33
7	3	60	20	1.5	68.99	45.26
8	3	60	35	1.0	32.15	37.24
9	3	90	35	1.5	86.43	91.18
10	1	90	35	1.0	48.52	52.33
11	3	90	50	1.0	57.12	82.31
12	3	60	50	1.5	45.96	50.25
13	3	60	20	2.0	74.49	76.37
14	3	90	50	2.0	84.45	94.42
15	3	120	50	1.5	74.37	80.43
16	1	60	35	1.5	59.91	35.19
17	3	90	35	1.5	86.43	91.16
18	3	120	35	2.0	69.38	76.42
19	3	90	35	1.5	86.48	91.23
20	3	90	35	1.5	86.75	91.16
21	1	120	35	1.5	61.18	67.09
22	3	60	35	2.0	61.96	82.89
23	3	120	20	1.5	74.43	80.36
24	3	90	20	1.0	65.76	71.32
25	1	90	35	2.0	71.36	76.44
26	5	90	50	1.5	73.24	80.21
27	5	60	35	1.5	55.12	62.42
28	3	120	35	1.0	69.49	76.91
29	1	90	50	1.5	59.45	70.54