Water softener

A water softening system comprising:

• a water softening tank for softening raw water containing a hardness component to softened water with a weakly acidic cation exchange resin;
• at least one neutralization tank for neutralizing a pH of the softened water with a weakly basic anion exchange resin, wherein the weakly basic anion exchange resin includes anions as terminals of functional groups included therein, the weakly basic anion exchange resin adsorbs hydrogen ions contained in the softened water with the anions to neutralize the softened water, and the softened water has flowed through the water softening tank;
• an electrolysis tank for generating acidic electrolyzed water and alkaline electrolyzed water, wherein the acidic electrolyzed water is used for regenerating the weakly acidic cation exchange resin of the water softening tank and the alkaline electrolyzed water is used for regenerating the weakly basic anion exchange resin of the at least one neutralization tank;
• a treatment tank for mixing acidic electrolyzed water that has flowed through the water softening tank and alkaline electrolyzed water that has flowed through the at least one neutralization tank to generate a mixture, and supplying the mixture to the electrolysis tank;
• a first supply channel for drawing the acidic electrolyzed water from the electrolysis tank and delivering the acidic electrolyzed water to an upstream side of the water softening tank;
• a second supply channel for drawing the alkaline electrolyzed water from the electrolysis tank and delivering the alkaline electrolyzed water from the electrolysis tank directly to the at least one neutralization tank;
• a first recovery channel connecting an upstream side of the treatment tank to a downstream side of the water softening tank;
• and
• a second recovery channel connecting the upstream side of the treatment tank to a downstream side of the at least one neutralization tank,
• wherein:
• the acidic electrolyzed water generated in the electrolysis tank is provided to the water softening tank via the first supply channel and the alkaline electrolyzed water generated in the electrolysis tank is provided to the at least one neutralization tank via the second supply channel,
• the treatment tank mixes the acidic electrolyzed water that has flowed through the first recovery channel and the alkaline electrolyzed water that has flowed through the second recovery channel, and
• the mixture is caused to flow from the treatment tank to the electrolysis tank.