Batch ion-exchange membrane electrodialysis of mother liquid discharged from a salt-manufacturing process. Experiment and simulation

Succeeding to the above investigation, mother liquid was supplied to the batch electrodialysis process in the computer simulation program. The performance changes with time were computed with an instantaneous open/shut feed operation system of a salt solution. Computation was carried out to discuss the performance of the electrodialysis experiment of the mother liquid. The computed data are generally the same as the experimental data for ion flux across a membrane pair JS, current efficiency η, solution volume circulated in the desalting side Q0, energy consumption for desalination Edes and for concentration Econc. However, the computed solution flux across a membrane pair JV and cell voltage Vcell are larger than observed ones. The computed salt concentration at the inlets of desalting cells C′in and the salt concentration at the outlets of concentrating cells C″ are less than observed ones.