Table 6.
Characterization of feed and permeate in terms of total solids, total suspended solids (TSS), chemical oxygen demand (COD), total organic carbon (TOC) and oil and grease in tests 1–4.
| Concentration (mg/L) | Test 1 | Test 2 | Test 3 | Test 4 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feed 0 h | Feed 24 h | Permeate 24 h | Feed 0 h | Feed 24 h | Permeate 24 h | Feed 0 h | Feed 24 h | Permeate 24 h | Feed 0 h | Feed 24 h | Permeate 24 h | |
| Total solids | 7012 | 5664 | 4416 | 5232 | 4692 | 3728 | 6148 | 6072 | 3108 | 6644 | 5168 | 2944 |
| TSS | 1525 | 770 | 1.7 | 843 | 640 | 1.8 | 2233 | 1813 | 12 | 3432 | 2460 | 5.6 |
| COD | 8824 | 5752 | 3756 | 7085 | 6715 | 4465 | 9708 | 9264 | 3516 | 9264 | 8468 | 2832 |
| TOC | 2247 | 1530 | 1152 | 2812 | 2031 | 1120 | 2813 | 3126 | 904 | 2346 | 2623 | 856 |
| Oil and grease | 270 | 30 | 7.6 | 250 | 58 | 8.5 | 360 | 93 | 4 | 220 | 89 | 3 |