Table 3.
Qualities of potato starch wastewater before and after treated by SBR (with or without bioflocculant addition) (under the condition of influent average COD of 7836 mg/L, temperature of 25 °C, continual aerations of 2.5 h and sludge density of 2000–3000 mg/L)
| Potato starch wastewater | After treated by SBR technology without bioflocculant | Removal rate (%) | After treated by SBR technology with 30 mg/L bioflocculant | Removal rate (%) | |
|---|---|---|---|---|---|
| COD (mg/L) | 7836 | 2492 | 68.2 | 211.6 | 97.3 |
| BOD5 (mg/L) | 2154 | 747.4 | 65.3 | 176.6 | 91.8 |
| Ammonium | |||||
| (mg/L) | 25.6 | 8.7 | 66.1 | 1.4 | 94.6 |
| TP | |||||
| (mg/L) | 18.3 | 7.2 | 60.8 | 0.27 | 98.5 |
| Turbidity (NTU) | 685 | 187.7 | 72.6 | 38.4 | 93.4 |
| Chroma | 45 | 13.3 | 70.5 | 2.7 | 94.0 |
| pH value | 6.8 | 6.5 | — | 6.6 | — |