SEAWATER DESALINATION METHOD, AND SEAWATER DESALINATION DEVICE

摘要

Provided is a seawater desalination method characterized by alternately carrying out a first step and a second step. In the first step, first concentrated water is obtained by filtering biologically treated water by means of a first reverse osmosis membrane device, first mixed water is obtained by mixing the first concentrated water with seawater, and the first mixed water is filtered by means of a second reverse osmosis membrane device. In the second step, second concentrated water is obtained by filtering biologically treated water by means of the second reverse osmosis membrane device, second mixed water is obtained by mixing the second concentrated water with seawater, and the second mixed water is filtered by means of the first reverse osmosis membrane device.