| initial concentration of COD (mg/L) | COD removal (%) | resources |
| Anaerobic sequencing batch reactor |
| |
| 17,000 | 64 - 85 | [11] |
| 6000 | 80 | [12] |
| Up-flow anaerobic sludge blanket (UASB) |
| |
| 45,000 - 90,000 | 71 | [15] |
| 6000 | 77 | [23] |
| Moving-bed biofilm reactor (MBBR) |
| |
| 800 - 2000 | 20 | [24] |
| 7500 - 7900 | 8 | [25] |
| Membrane bioreactor (MBR) |
| |
| 1000 - 3000 | 80 - 83 | [26] |
| 1550 | 63 | [20] |
| 14,000 | 80 | [27] |
| aerobic sequencing batch reactor (ASBR) |
| |
| 4000 | 87 | [21] |
| 3200 | 30 | [28] |
| Aerated lagoons |
| |
| 1740 | 75 | [22] |
| 5518 | 97 | [29] |