Table 1.
Operational conditions in the submerged fixed-film bioreactor at bench scale during the experiments.
| Parameter | Influent 1 | Effluent 2 | Reduction % | LSD |
|---|---|---|---|---|
| BOD5 (mg O2/L) | 425.65 ± 97.83 | 17.24 ± 6.51 | 95.95 | 23.87 |
| COD (mg O2/L) | 980.26 ± 233.05 | 78.47± 28.64 | 92.00 | 48.12 |
| pH | 7.55 ± 0.21 | 7.46 ± 0.26 | - | 0.12 |
| TSS (mg/L) | 622.43 ± 398.95 | 19.48 ± 7.61 | 96.87 | 4.05 |
| VSS (mg/L) | 520.48 ± 153.24 | 13.10 ± 6.14 | 97.48 | 3.86 |
Average values marked with the same letter are not significantly different, according to the least significant difference (LSD) test (p < 0.05). 1 Urban wastewater; 2 Urban wastewater after treatment. The working conditions had a duration of 45 days.