Sample | Parameters (mg/l) | ||
TKN | BOD | COD | |
Greywater | 87 ± 3 | 1175 ± 25 | 1908 ± 108 |
Sand | 39.7 ± 0.95 | 11 ± 1 | 741.5 ± 28.5 |
Sand + biochar | 25.8 ± 2.4 | 12.5 ± 2.5 | 691.5 ± 151.5 |
Sand + charcoal | 23.4 ± 1.8 | 9 ± 1 | 617 ± 50 |
Sand + organoclay | 7.8 ± 0.6 | 8.5 ± 1.5 | 699.5 ± 66.5 |
Sand + sawdust | 10.4 ± 2 | 47.5 ± 2.5 | 714.5 ± 151.5 |