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

Table 5

Average percentage reductions of DOC, BOD₅, and COD obtained in the treatment of dairy effluent by Photo-Fenton processes according to the Box-Behnken matrix for optimal experimental results (5).

Duration (min)	% Reduction DOC	% Reduction COD	% Reduction BOD5	Reduction
				BOD5/COD	DOC/COD
0	0	0	0	—	—
10	46.20	52.74	49.47	0.938	0.876
20	56.29	61.04	58.36	0.956	0.922
30	72.42	75.46	71.34	0.945	0.959
40	74.12	76.97	75.11	0.976	0.963
50	77.23	80.10	77.60	0.969	0.964
60	80.08	80.55	79.25	0.984	1.020