| Parameters |
L1 |
L2 |
Mean (L1 & L2) |
NT 106 002** |
| pH |
8.25 |
8.15 |
8.20 |
6.5-9 |
| Electric conductivity (ms/cm) |
42.80 |
36.50 |
39.65 |
NA |
| COD (mg O2/l) |
20500 |
22460 |
21480 |
1000 |
| BOD5 (mg O2/l) |
5780 |
5200 |
5490 |
400 |
| BOD5/COD |
0.28 |
0.23 |
0.25 |
0.4 |
| Fe (mg/l) |
20500 |
22460 |
21480 |
5 |
| Cr (mg/l) |
1.22 |
1.12 |
1.17 |
0.5 |
| Zn (mg/l) |
0.72 |
0.77 |
0.745 |
5 |
| Cu (mg/l) |
0.81 |
0.78 |
0.795 |
1 |
| Cd (mg/l) |
0.042 |
0.047 |
0.044 |
0.1 |
| Ni (mg/l) |
0.22 |
0.25 |
0.23 |
2 |
| Pb (mg/l) |
0.4 |
0.3 |
0.35 |
1 |
| Mn (mg/l) |
0.048 |
0.051 |
0.046 |
1 |
** Norm for the wastewater drained to public sewer, Tunisia
NA: Not available |
