| A | effective area of the membrane (m2) | t | filtration time (h) |
| Cf | concentrations of the feed solution (g/L) | FRR | rejection ratio (%) |
| Cp | concentrations of the permeate solution (g/L) | R | rejection ratio (%) |
| J | permeate flux (L/m2·h) | Rt | total fouling ratio (%) |
| Jp | flux of BSA (L/m2.h) | Rir | irreversible fouling ratio (%) |
| JR | flux of fouled membrane washed with DI-water (L/m2h) | Rr | reversible fouling ratio (%) |
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