The Production of Citric Acid Using Electrodialysis with Bipolar Membrane of Sodium Citrate Solutions

Investigations on sodium citrate conversion to citric acid by the pure electrodialysis process with bipolar membrane were carried out. The current efficiencies based on the number of moles of produced acid and on the concentration changes were determined. Both the mean and the instantaneous efficiencies were calculated. It was found that the mean efficiencies of acid and base are higher at the lowest current densities (52 mA/cm 2 ), with the maximum being observed at 78 mA/cm 2 for the highest initial salt concentration