Photocatalytic Efficiency of TiO₂-Biomass Loaded Mixture for Wastewater Treatment

Table 5

ANOVA for the percentage of COD removal.

Source	Sum of squares	Degrees of freedom (df)	Mean square	value	value; Prob. >
Model	2,184.41	5	436.68	1,019.22	<0.0001
	1,506.97	1	1,506.97	3,515.66	<0.0001
	199.79	1	199.79	466.10	<0.0001
	46.65	1	46.65	108.83	<0.0001
	427.98	1	427.98	998.45	<0.0001
	19.54	1	19.54	45.59	0.0003
Residual	3.00	7	0.43
Lack of fit	0.59	3	0.20	0.33	0.8076
Pure error	2.41	4	0.60
Cor. total	2,187.41	12

= 0.9986; adj. = 0.9976; pred. = 0.9964; adeq. precision = 91.919; CV = 2.47%.