| U/V | Cell voltage |
| m/kg | Mass |
| A/m2 | Membrane geometric surface area |
| N | Number of membrane pairs |
| I/A | Current |
| P | Apparent permselectivity |
| mF/ kg | Mass of the feed in electrodialysis |
| N | Number of moles |
| t/s | Time |
| F/96500 C·mol−1 | Faraday constant |
| к/mS·m−1 | Specific conductivity |
| ji/mole. s−1·m−2 | Mass flux of i through the membrane |
| CF/kg·m−2·h−1 | Electrodialysis capacity |
| g/cm3 | Density |
| E Wh·kgF−1 | Electrical energy used in electrodialysis per mass of the feed |
| α-LA | α-lactalbumin (whey protein) |
| β-LG A | β-lactoglobulin A (whey protein) |
| β-LG B | β-lactoglobulin B (whey protein) |
| AEM | Anion exchange membrane |
| CEM | Cation exchange membrane |
| CMP | Casein macropeptide |
| CIP | Cleaning in place |
| °C | Temperature |
| DD | Degree of demineralization |
| ED | Electrodialysis |
| F | Feed (raw material) |
| NFW | Nanofiltered acidic whey |
| ODB | On dry basis in percent (Ash) |
| P | Product |
| PED | Pulsed electrodialysis |
| PER | Pulsed electrodialysis reversal |
| °SH | Acidity, Soxlet Henkel degrees (0.25N NaOH) |