Performance Optimization of Chemical and Green Coagulants in Tannery Wastewater Treatment: A Response Surface Methodology Approach

Table 7

Predicted and experimental values at optimal process conditions.

Variables		Responses
Dosage, (g/L)	pH,	COD removal, (%)		TSS removal, (%)		SVI, (mL/g)
		Predicted	Experimental	Predicted	Experimental	Predicted	Experimental
Cassava starch
2.76	3.17	37.25	37.01	73.95	73.61	14.80	15.01
Orange peel powder
5.16	3.74	17.97	17.72	66.08	65.79	19.87	19.44
Alum
11.6	6.09	38.51	38.85	76.05	76.36	29.57	29.24