Characterization of the eight lots of wastewater used in the study, collected from the industry
| . | Lots of wastewater collected from the industry . | |||||||
|---|---|---|---|---|---|---|---|---|
| 1 (phase 1) . | 2 (phase 1) . | 3 (phase 1) . | 4 (phase 1) . | 5 (phase 1) . | 6 (phase 2) . | 7 (phase 2) . | 8 (phase 2) . | |
| COD (mg O2·L−1) | 497.5 ± 167.5 | 472.2 ± 167.9 | 694.1 ± 214.7 | 991.1 ± 176.8 | 245.0 ± 61.4 | 299.4 ± 138.1 | 416.7 ± 25.3 | 838.2 ± 54.8 |
| COD/SO42− | 0.56 ± 0.2 | 0.83 ± 0.3 | 0.63 ± 0.2 | 0.71 ± 0.1 | 0.16 ± 0.1 | 0.34 ± 0.18 | 0.79 ± 0.05 | 1.55 ± 0.21 |
| Sulphate (mg SO4−2·L−1) | 896.1 ± 27.6 | 573.9 ± 97.4 | 1,101.0 ± 29.1 | 1,413.3 ± 374.8 | 1,568.6 ± 50.8 | 863.5 ± 84.8 | 529.4 ± 39.5 | 547.6 ± 74.7 |
| Colour (mg Pt-Co·L−1) | 168 | 652 | 399 | 462 | 570 | 382 | 345 | 502 |
| Bicarbonate alkalinity (mg CaCO3·L−1) | 55.9 ± 2.7 | 196.8 ± 17.5 | 0 | 0 | 301.8 ± 28.5 | 237.4 ± 44.3 | 80.1 ± 22.9 | 111.9 ± 92.1 |
| Total alkalinity (mg CaCO3·L−1) | 84.2 ± 7.4 | 307.6 ± 37.6 | 109.5 | 117.3 | 427.3 ± 75.5 | 347.0 ± 58.9 | 145.7 ± 40.6 | 254.4 ± 172.2 |
| Salinity (g·kg−1) | 7.2 ± 0.2 | 6.2 ± 0.2 | 7.5 ± 0.1 | 12.6 ± 0.2 | 6.2 ± 0.1 | 4.7 ± 0.1 | 3.7 ± 0.1 | 5.8 ± 0.2 |
| pH | 6.8 | 7.0 | 5.6 | 5.7 | 6.6 | 7.2 | 7.0 | 7.6 |
| BOD5,20 (mg O2·L−1) | 60 | 140 | 120 | 580 | 160 | 70 | 100 | 310 |
| Nitrogen TKN (mg N-TKN·L−1) | 14.6 | 14.3 | 15.5 | 20.5 | 21.0 | 14.7 | 15.5 | 22.2 |
| Ammonia (mg N-NH3·L−1) | 5.8 | 6.6 | 5.8 | 5.3 | 6.8 | 3.4 | 2.7 | 7.1 |
| Phosphorus (mg P-PO42−.L−1) | 0.1 | 0.8 | 0.6 | 0.1 | 0.3 | 1.7 | 3.0 | 1.9 |
| COD:N:P | 250:7.3:0.1 | 250:7.6:0.4 | 250:5.6:0.2 | 250:5.2: < 0.1 | 250:21.4:0.3 | 250:12.3:1.4 | 250:9.3:1.8 | 250:6.6:0.6 |
| LAS (mg·L−1) | <1 | <1 | <1 | <1 | <1 | <1 | 5.9 | 2.9 |
| . | Lots of wastewater collected from the industry . | |||||||
|---|---|---|---|---|---|---|---|---|
| 1 (phase 1) . | 2 (phase 1) . | 3 (phase 1) . | 4 (phase 1) . | 5 (phase 1) . | 6 (phase 2) . | 7 (phase 2) . | 8 (phase 2) . | |
| COD (mg O2·L−1) | 497.5 ± 167.5 | 472.2 ± 167.9 | 694.1 ± 214.7 | 991.1 ± 176.8 | 245.0 ± 61.4 | 299.4 ± 138.1 | 416.7 ± 25.3 | 838.2 ± 54.8 |
| COD/SO42− | 0.56 ± 0.2 | 0.83 ± 0.3 | 0.63 ± 0.2 | 0.71 ± 0.1 | 0.16 ± 0.1 | 0.34 ± 0.18 | 0.79 ± 0.05 | 1.55 ± 0.21 |
| Sulphate (mg SO4−2·L−1) | 896.1 ± 27.6 | 573.9 ± 97.4 | 1,101.0 ± 29.1 | 1,413.3 ± 374.8 | 1,568.6 ± 50.8 | 863.5 ± 84.8 | 529.4 ± 39.5 | 547.6 ± 74.7 |
| Colour (mg Pt-Co·L−1) | 168 | 652 | 399 | 462 | 570 | 382 | 345 | 502 |
| Bicarbonate alkalinity (mg CaCO3·L−1) | 55.9 ± 2.7 | 196.8 ± 17.5 | 0 | 0 | 301.8 ± 28.5 | 237.4 ± 44.3 | 80.1 ± 22.9 | 111.9 ± 92.1 |
| Total alkalinity (mg CaCO3·L−1) | 84.2 ± 7.4 | 307.6 ± 37.6 | 109.5 | 117.3 | 427.3 ± 75.5 | 347.0 ± 58.9 | 145.7 ± 40.6 | 254.4 ± 172.2 |
| Salinity (g·kg−1) | 7.2 ± 0.2 | 6.2 ± 0.2 | 7.5 ± 0.1 | 12.6 ± 0.2 | 6.2 ± 0.1 | 4.7 ± 0.1 | 3.7 ± 0.1 | 5.8 ± 0.2 |
| pH | 6.8 | 7.0 | 5.6 | 5.7 | 6.6 | 7.2 | 7.0 | 7.6 |
| BOD5,20 (mg O2·L−1) | 60 | 140 | 120 | 580 | 160 | 70 | 100 | 310 |
| Nitrogen TKN (mg N-TKN·L−1) | 14.6 | 14.3 | 15.5 | 20.5 | 21.0 | 14.7 | 15.5 | 22.2 |
| Ammonia (mg N-NH3·L−1) | 5.8 | 6.6 | 5.8 | 5.3 | 6.8 | 3.4 | 2.7 | 7.1 |
| Phosphorus (mg P-PO42−.L−1) | 0.1 | 0.8 | 0.6 | 0.1 | 0.3 | 1.7 | 3.0 | 1.9 |
| COD:N:P | 250:7.3:0.1 | 250:7.6:0.4 | 250:5.6:0.2 | 250:5.2: < 0.1 | 250:21.4:0.3 | 250:12.3:1.4 | 250:9.3:1.8 | 250:6.6:0.6 |
| LAS (mg·L−1) | <1 | <1 | <1 | <1 | <1 | <1 | 5.9 | 2.9 |