Abstract
Experiments were conducted on electrolytic concentration of sea water with porous heterogeneous ion exchange membranes, and the following results were obtained.
1. The consumption of electric power for producing the concentrated brine equivalent to one ton of salt is influenced by the current density, but it is also greatly influenced by the amount of brine to be produced.
2. The efficiency of the electric current differs according to the amount of brine to be produced. Accordingly, when the amount of brine is increased, the efficiency becomes higher.
3. Brine decreases its specific density as the amount is increased.
4. The above results are considered to be attributable to the porosity of the ion exchange membranes.
