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

Table 2

Characteristics of vegetable tannery wastewater.

Parameters	SI unit	Values	Ghana EPA [31]
pH	—	6.29 ± 0.35	6.0–9.0
Colour	Pt-Co	22400 ± 5931.86	100
TSS	mg/L	3441.25 ± 621.63	50
Turbidity	NTU	1380 ± 399.53	75
COD	mg/L	24928 ± 327.26	250
BOD5	mg/L	2639 ± 25.56	50
BOD5: COD	—	0.11 ± 0.01	—
TN-N	mg/L	36.70 ± 5.45	50
Cl^−	mg/L	722 ± 56	—