ABSTRACTThe feasibility of desalting the spent brine from pickled prune processing by electrodialysis was studied. Three membrane pairs were tested and one was selected for the process. The limiting current density increased with increasing fluid velocity as well as increasing salt concentration. Increasing current density increased the ion removal rate, the rate of water transport, the power consumption per unit mass of salt removal, and decreased current efficiency. However, the losses of citric acid and benzaldehyde did not increase significantly until the current density was up to 10 mA/cm2. The electrodialysis process removed 88 salt from the brine while retaining 80 organic acids and 55 benzaldehyde.
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