The Application of a Surface Response Methodology in the Solar/UV-Induced Degradation of Dairy Wastewater Using Immobilized ZnO as a Semiconductor

Table 3

Surface response methodology matrix using 2 factors and 15 runs in duplicate and TOC effective percentage degradation of the dairy effluent after the AOP treatment.

Experiments	pH	Thickness (μm)	TOC effective percentage degradation
1	8.0	50	31.6
2	10.0	100	5.4
3	6.0	100	5.7
4	6.0	0	7.9
5	10.0	0	13.6
6	10.0	0	6.8
7	6.0	100	9.3
8	6.0	0	1.3
9	8.0	50	31.5
10	10.0	100	10.6
11	6.0	100	4.6
12	6.0	0	0.5
13	10.0	0	11.7
14	10.0	100	7.5
15	6.0	0	7.2
16	10.0	100	13.6
17	10.0	0	6.6
18	8.0	50	26.4
19	8.0	50	28.7
20	6.0	100	5.4
21	10.0	100	10.5
22	8.0	50	26.6
23	6.0	100	6.1
24	6.0	0	2.4
25	6.0	100	7.1
26	8.0	50	25.9
27	10.0	100	13.9
28	10.0	0	4.4
29	10.0	0	7.5
30	6.0	0	4.4