A water treatment system comprising an ion exchange vessel, a cationic resin located within the ion exchange vessel, and an anionic resin located within the ion exchange vessel.

An ion exchange device is used that includes an anion exchange tank, a cation exchange tank and a tower body side portion, in which the anion exchange tank and the cation exchange tank are allowed to communicate by communication means that is arranged around the outside of the anion exchange tank and the cation exchange tank. The ion exchange device also includes supply/discharge pipes for supplying or discharging a liquid to or from an upper portion and a lower portion of the anion exchange tank, and supply/discharge pipes for supplying or discharging a liquid to or from an upper portion and a lower portion of the cation exchange tank. A water collection/distribution member that allows water to pass but prevents passage of an ion-exchange resin is provided in a flat plate.

An ion exchange device is used that includes an anion exchange tank, a cation exchange tank and a tower body side portion, in which the anion exchange tank and the cation exchange tank are allowed to communicate by communication means that is arranged around the outside of the anion exchange tank and the cation exchange tank. The ion exchange device also includes supply/discharge pipes for supplying or discharging a liquid to or from an upper portion and a lower portion of the anion exchange tank, and supply/discharge pipes for supplying or discharging a liquid to or from an upper portion and a lower portion of the cation exchange tank. A water collection/distribution member that allows water to pass but prevents passage of an ion-exchange resin is provided in a flat plate.

Provided is a method of regenerating an acrylic resin (B2), comprising (A) providing a collection of particles of acrylic resin (B2) that has calculated Hansch parameter of 1.0 to 2.5, wherein one or more humic acid, one or more fulvic acid, or a mixture thereof, is adsorbed onto said acrylic resin (B2), and (B) bringing said collection of particles of acrylic resin (B2) into contact with an aqueous solution (RA) having pH of 4 or lower, to form a mixture B2RA, (C) then separating acrylic resin (B3) from said mixture B2RA.

A deionization device for liquids includes a first chamber for a first ion exchange agent that has a first intake opening and a first discharge opening. A second chamber for a second ion exchange agent has a second intake opening and a second discharge opening. A line connects the first chamber and the second chamber that has a third intake opening and a third discharge opening. The third intake opening is dedicated to the first discharge opening of the first chamber and the third discharge opening is dedicated to the second intake opening of the second chamber. The line also has a first regeneration opening for a first regeneration liquid, wherein the first regeneration opening can be closed for deionization, and wherein the line can be closed for regenerating the deionization device such that the third intake opening can be isolated from the third discharge opening.

A deionization device for liquids includes a first chamber for a first ion exchange agent that has a first intake opening and a first discharge opening. A second chamber for a second ion exchange agent has a second intake opening and a second discharge opening. A line connects the first chamber and the second chamber that has a third intake opening and a third discharge opening. The third intake opening is dedicated to the first discharge opening of the first chamber and the third discharge opening is dedicated to the second intake opening of the second chamber. The line also has a first regeneration opening for a first regeneration liquid, wherein the first regeneration opening can be closed for deionization, and wherein the line can be closed for regenerating the deionization device such that the third intake opening can be isolated from the third discharge opening.

Provided is a method of purifying water comprising (a) providing an aqueous solution (A) that has pH of 5.5 or lower and that comprises (i) one or more dissolved organic compounds in an amount of 5 mg/L or more, measured as dissolved organic carbon, and (ii) 95% or more water by weight based on the weight of the aqueous solution (A), and (b) bringing the aqueous solution (A) into contact with a collection of particles of acrylic resin (B) that has calculated Hansch parameter of 1.0 to 2.5, and (c) then separating an aqueous solution (C) from the collection of particles of acrylic resin (B).

Provided is a method of purifying water comprising (a) providing an aqueous solution (A) that has pH of 5.5 or lower and that comprises (i) one or more dissolved organic compounds in an amount of 5 mg/L or more, measured as dissolved organic carbon, and (ii) 95% or more water by weight based on the weight of the aqueous solution (A), and (b) bringing the aqueous solution (A) into contact with a collection of particles of acrylic resin (B) that has calculated Hansch parameter of 1.0 to 2.5, and (c) then separating an aqueous solution (C) from the collection of particles of acrylic resin (B).

Water softening device includes water softening tank, neutralization tank, and electrolytic tank. Electrolytic tank generates acidic electrolytic water for regenerating weakly acidic cation exchange resin and alkaline electrolytic water for regenerating weakly basic anion exchange resin. Then, water softening device includes an acidic electrolytic water circulation flow path that circulates the acidic electrolytic water through electrolytic tank, first discharge port, water softening tank, and first water intake port in the stated order, and an alkaline electrolytic water circulation flow path that circulates the alkaline electrolytic water through electrolytic tank, second discharge port, neutralization tank, and second water intake port in the stated order.

The invention relates to devices, systems, and methods for conditioning a zirconium oxide sorbent module for use in dialysis after recharging. The devices, systems, and methods can provide for conditioning and recharging of zirconium oxide in a single system, or in separate systems.