Abstract
The reverse osmosis (RO) method is a method obtaining the fresh water by using semi permeable RO membrane that does not percolate the low molecular weight material such as a salt. However, the RO method has to give continuous operation at high pressure in seawater desalination plants. In the present study, in order to improve the efficiency of RO desalination under low pressure conditions, the water treatment system is proposed by using microbubbles in salt water disposal and the effect of the microbubbles on the osmosis rate was investigated by measurements of the electric conductivity. It is confirmed that the fresh water is effectively produced for the system with microbubbles in contrast to that with no microbubbles, and the efficiency of desalination is significantly improved by microbubbles with a high electrical potential. The electric conductivity decreases with increasing the zeta potential of the microbubbles.
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