Heterogeneous Photocatalytic Degradation of Dairy Wastewater Using Immobilized ZnO

Table 5

Variance analysis of the polynomial model of first order for the dairy wastewater treatment by photocatalyst treatment.

	Coefficient	SE coefficient	T	P
Constant	8.852	8.558	1.02	0.382
Reaction time	3.765	2.850	1.32	0.278
Thickness of ZnO	1.835	2.850	0.64	0.565
pH	−4.600	2.850	−1.61	0.205
Effluent concentration	−0.260	2.850	−0.09	0.933

S = 4.03031, 𝑅² = 61.4%, 𝑅² (adjusted) = 10.0%.