| abstract |
An object of the present invention is to reduce endotoxin in advance and improve the efficiency of filtration by a reverse osmosis membrane in raw water before performing reverse osmosis treatment in order to obtain purified water used for an artificial dialysate. In a water treatment method for producing purified water by passing water to be treated through a reverse osmosis treatment device 4 comprising a reverse osmosis membrane, a working electrode 11 having a diamond thin film formed on a substrate, and the working electrode 11 And a counter electrode 13 that is opposed to each other with a gap of 0.05 to 1.0 mm, and an electrolyzer 2 that uses the gap as a flow path for the water to be treated is provided, and is less than a voltage at which water electrolysis occurs. A voltage is applied between the working electrode 11 and the counter electrode 13 to electrolyze the water to be treated, and the water to be treated whose endotoxin content is 1000 units / L or less is supplied to the reverse osmosis treatment device 4. [Selection] Figure 3 |