Abstract
A computer program is developed and a continuous ion exchange membrane process is simulated applying a constant voltage between electrodes. Inputting membrane characteristics, electrodialyzer specifi cations and electrodialysic conditions into the program, the performance of an electrodialyzer is predicted. Salt concentration in a desalted solution, current efficiency, desalting ratio, water recovery, energy consumption, current density distribution, current density non-uniformity coefficient, limiting current density are evaluated. Infl uence of cell voltage and salt concentration in a feeding solution on (1) the transport of ions (migration and diffusion) and solutions (electro-osmosis and hydro-osmosis) across a membrane pair, (2) ohmic and membrane voltage in a membrane pair and (3) electric resistance of membranes, desalting cells and concentrating cells in a stack are discussed at the inlets and outlets of desalting cells. Electro-osmosis, ohmic voltage and electric resistance of membranes are incre...
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