Inlet (S1)

Outlet (S3)

Average Efficiency (%)

Mean conc

SE1

Mean conc

SE1

TPH^*

3700

821

2060

276.5

45 ± 18

Oil^*

890

254

737

111

28 ± 33

COD^*

108000

15500

99967

5341

2 ± 23

Ba^**

197

24

146

34

29 ± 30

Pb^**

82

2

29

7

65.5 ± 22

Cr^**

54

4

43

2

19 ± 13

Co^**

20

2.5

21

2

−10 ± 12

Cu^**

377

44.5

316

94.5

28 ± 43

Ni^**

45

4

83

14

−84 ± 57

Zn^**

7867

267

8500

430

−8 ± 13