Pollutant Removal from Wastewater at Different Stages of the Tanning Process by Electrocoagulation

Table 1

Initial characteristics of wastewater at different stages.

Sample characteristics	S1	S2	S3	S4
Temperature (°C)	19.2	16.2	12.6	19.9
pH	3.73	3.64	7.09	3.45
Conductivity (mS/cm)	41.3	5.16	18.67	6.95
COD (mg/L)	533.33	3072.16	5550	8286
TOC (mg/L)	393.80	1980.20	836.5	1070
Total solids (mg/L)	6000	8331.67	22625	8423
Total suspended solids (mg/L)	701.67	838.33	690	587.5
Settleable solids (ml/L)	240	158	51	80
Turbidity (NTU)	525	1126	495	800
Total Cr (mg/L)	313.2	100.5	60.53	121.4
Total Fe (mg/L)	337.27	0	0	0