The Application of Response Surface Methodology in the Study of Photodegraded Industrial Dairy Effluents by the Photo-Fenton Process: Optimization and Economic Viability

Table 4

Percentage reduction variations of the DOC as per factors and levels to the array of Box-Behnken array for Photo-Fenton-treated dairy effluent.

Exp.	pH	Fenton reagent		UV	Reduction
		mH2O2 (g)	mFe^2+ (g)		% DOC
1	3.0	32.5	2.6	0	61.6
2	3.0	32.5	2.6	0	58.7
3	3.5	32.5	2.6	15	60.0
4	3.0	30.0	2.1	15	61.1
5	3.5	35.0	3.6	28	80.9
6	3.5	32.5	2.6	15	61.8
7	3.0	32.5	2.6	28	74.0
8	3.5	35.0	3.6	28	78.4
9	3.0	35.0	3.6	15	68.3
10	3.5	30.0	2.1	0	68.2
11	3.5	32.5	2.6	15	63.6
12	3.5	32.5	2.6	15	66.1
13	4.0	32.5	2.6	0	59.7
14	3.5	32.5	2.6	15	61.5
15	3.0	30.0	2.1	15	59.8
16	3.5	35.0	3.6	0	68.3
17	4.0	30.0	2.1	15	57.6
18	3.0	35.0	3.6	15	69.5
19	3.5	30.0	2.1	0	67.6
20	4.0	30.0	2.1	15	60.0
21	3.0	32.5	2.6	28	73.0
22	4.0	35.0	3.6	15	64.0
23	3.5	30.0	2.1	28	75.6
24	3.5	30.0	2.1	28	76.3
25	3.5	35.0	3.6	0	67.9
26	4.0	32.5	2.6	28	62.1
27	3.5	32.5	2.6	15	65.5
28	4.0	35.0	3.6	15	62.3
29	4.0	32.5	2.6	28	61.0
30	4.0	32.5	2.6	0	55.0