Table 7.
Main physicochemical properties of feed (FD) and permeate (PR) samples collected during RO test with the MF permeates of three different types of OMW.
| VCR | P (bar) |
pH | Conductivity (µS/cm) | COD (mg/L) | Phenols (mg/L) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FD | PR | FD | PR | R (%) | FD | PR | R (%) | FD | PR | R (%) | ||
| OMW1-FR | ||||||||||||
| 1.00 | 30 | 4.48 | 3.79 | 5100 | 89.7 | 98.24 | 19,650 | 628 | 96.80 | 2900 | 6.0 | 99.79 |
| 1.96 | 30 | 4.58 | 3.61 | 8880 | 109.0 | 98.77 | 36,170 | 926 | 97.44 | |||
| 6.56 | 30 | 4.68 | 3.83 | 20,900 | 253.0 | 98.79 | ||||||
| 10.50 | 30 | 26,700 | 1382 | 94.82 | 140,120 | 2558 | 98.17 | 24300 | 28.0 | 99.88 | ||
| OMW2-CA | ||||||||||||
| 1.00 | 30 | 5.88 | 4.81 | 13,200 | 116.3 | 99.12 | 40,180 | 2010 | 95.00 | 1070 | 5.0 | 99.53 |
| 1.23 | 30 | 5.87 | 4.84 | 15,200 | 133.4 | 99.12 | 53,990 | 2231 | 95.87 | |||
| 1.60 | 30 | 5.86 | 4.86 | 16,370 | 199.2 | 98.78 | 65,860 | 2495 | 96.21 | |||
| 2.29 | 30 | 5.9 | 4.9 | 18,910 | 239.7 | 98.73 | 86,960 | 3840 | 95.58 | |||
| 4.00 | 30 | 5.98 | 4.92 | 20,490 | 318.9 | 98.44 | 109,220 | 8855 | 91.89 | |||
| 5.33 | 30 | 6.02 | 4.96 | 27,400 | 904.0 | 96.70 | 151,700 | 15,325 | 89.90 | 5600 | 57.3 | 98.98 |
| 6.15 | 50 | 6.12 | 4.89 | 30,200 | 702.0 | 97.68 | 191,350 | 4075 | 97.87 | 6420 | 24.2 | 99.62 |
| OMW3-SG | ||||||||||||
| 1.00 | 30 | 5.45 | 5.27 | 12,100 | 115.2 | 99.05 | 58,560 | 2933 | 94.99 | 2250 | 2.2 | 99.90 |
| 1.24 | 30 | 17,130 | 128.4 | 99.25 | 78,280 | 3189 | 95.93 | |||||
| 1.62 | 30 | 20,500 | 192.7 | 99.06 | 104,320 | 4543 | 95.65 | |||||
| 2.33 | 30 | 5.5 | 5.21 | 25,800 | 738.0 | 97.14 | 120,800 | 10,000 | 91.72 | |||
| 2.74 | 30 | 29,000 | 1592 | 94.51 | 159,220 | 13,855 | 91.30 | 7500 | 54.0 | 99.28 | ||
| 3.62 | 40 | 33,800 | 1734 | 94.87 | 215,850 | 16,620 | 92.30 | |||||
| 4.57 | 50 | 5.59 | 5.16 | 36,100 | 3320 | 90.80 | 261,900 | 8720 | 96.67 | 9850 | 26.0 | 99.74 |