| abstract |
This water softener (101) comprises a water-softening tank (103), a neutralizing tank (104), an electrolytic tank (112), and a treatment tank (113). The water-softening tank (103) softens, with a weakly acidic cation-exchange resin (110), raw water containing a hardness component. The neutralizing tank (104) neutralizes, with a weakly basic anion-exchange resin (111), the pH of the soft water that has passed through the water-softening tank (103). The electrolytic tank (112) produces: acidic electrolyzed water for regenerating the weakly acidic cation-exchange resin (110) of the water-softening tank (103); and alkaline electrolyzed water for regenerating the weakly basic anion-exchange resin (111) of the neutralizing tank (104). The treatment tank (113) mixes the acidic electrolyzed water, which has passed through the water-softening tank (103), with the alkaline electrolyzed water, which has passed through the neutralizing tank (104), and supplies the mixed water to the electrolytic tank (112). |