Table 1. Operating condition for MBRs .
| Parameters | Ranges |
| Working volume | 12.5 L.day-1 |
| Temperature | 29±1OC |
| pH | 4.5±2 |
| hydraulic retention times (HRT) | 15h |
| Air flow rate | 2.51/min |
| Aeration rate | 51/min |
| mixed liquor suspended solids (MLSS) | 2000 mg.L-1 |
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