Abstract
As mentioned in our previous report, we found in our former experi-ments that when sea water is concentrared by electrodialysis with heterogeneous ion exchange membranes, the amount of brine to be obtained greatly influences the retsult of the concentration. This time, therefore, we made a study as to the influence by keeping the current density constant, and obtained the following results:
1. When the amount of brine to be obtained is increased by the increase of water head difference between the both concentrated and desalted chambers, the amount of salt to be obtained shows an increase, but the concentration of brine becomes lower.
2. The decrease in the amount of brine results in the decrease of the current efficiency, and as a consequence the consumption of electricity increases.
3. When the amount of brine is increased, the voltage of cell slightly increases.
