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Quality of C2H2O4-precipitated feed, permeate and concentrate in verification filtration using NF90-2540 element.
| pH | π mS/cm |
NH4-N mg/L |
NO3-N mg/L |
Ca mg/L |
K mg/L |
Mg mg/L |
Cl mg/L |
SO4 mg/L |
COD mg/L |
|
|---|---|---|---|---|---|---|---|---|---|---|
| Original | 7.1 | 6.1 | 160 | 12.3 | 440 | 58 | 82 | 19 | 1900 | 160 |
| Feed | 2.1 | 8.4 | 160 | 13.8 | 110 | 73 | 110 | 21 | 2990 | 240 |
| Concentrate | 1.7 | 56 | 1910 | 15.7 | 540 | 660 | 980 | 20 | 36,300 | 110 |
| Permeate | 2.4 | 1.8 | 4.8 | 1.9 | 1 | 4 | 2 | 5.4 | 150 | 160 |
