ELECTRODE WATER RECOVERY METHOD AND METHOD FOR PRODUCING ULTRAPURE WATER OR PHARMACEUTICAL WATER

An electrode water recovery method is an electrode water recovery method for removing hydrogen gas from electrode water generated by passage of water to be treated through a cathode chamber in an electric deionization treatment and recovering the electrode water in an ultrapure water production step, in which the electrode water is sprayed onto a filling material with which a scrubber is filled, an inert gas is supplied from below the filling material to react with the hydrogen gas in the electrode water, a treated gas generated by the reaction is exhausted from an exhaust port above the filling material, and treated water from which the hydrogen gas has been removed is recovered.