Table 2 Ion concentration of the microfiltered fermentation broth and the ion rejection of the membranes at 30 bar (NP30 at 25 bar)
Ions [–] | Concentration (ppm) | Rejection (%) | |||||
|---|---|---|---|---|---|---|---|
DK73 | DL73 | NP30 | NF45 | TW30 | SW30 | ||
Mg2+ | 23 | 89 | 96 | 76 | 90 | 44 | 75 |
Ca2+ | 88 | 78 | 89 | 71 | 89 | 23 | 63 |
K+ | 357 | 16 | 11 | 66 | 49 | 41 | 69 |
Na+ | 18,220 | 18 | 3 | 65 | 49 | 43 | 69 |
NH4 + | 111 | 29 | 27 | 76 | 39 | 46 | 70 |
Cl− | 112 | −4 | 9 | 55 | −25 | 25 | 39 |
SO4 2− | 153 | 71 | 64 | 65 | 88 | 26 | 61 |
PO4 3− | 11 | 74 | 55 | 56 | 100 | −82 | 26 |