Abstract: Provided is a production apparatus of a non-aqueous electrolyte solution that can produce conveniently and at a low cost the non-aqueous electrolyte solution while readily controlling an acidic impurity concentration so as to be in a prescribed level. The production apparatus of the non-aqueous electrolyte solution includes an original liquid tank that stores a liquid to be processed containing a non-aqueous electrolyte solution, and an ion-exchange resin container that accommodates a weakly basic anion-exchange resin, and also including a liquid circulation pipe that returns the liquid to be processed that is obtained after flowing the liquid to be processed from the original liquid tank through the ion-exchange resin container to the original liquid tank.

Abstract: A system for treating a tetraalkylammonium hydroxide-containing liquid having a high-pressure type reverse osmosis membrane device concentrating a liquid to be treated containing tetraalkylammonium hydroxide at a concentration side, and a line for supplying the concentrated liquid to be treated by the reverse osmosis membrane device to an evaporator further concentrating the concentrated liquid to be treated.

Abstract: A method for purifying a non-aqueous solvent includes: pretreating by passing a non-aqueous solvent for dehydration treatment through a packed bed of an ion exchange resin that is not yet subjected to dehydration treatment, to remove water in the ion exchange resin; and purifying by passing a non-aqueous solvent to be purified through the packed bed of the ion exchange resin from which water is removed during the pretreating, to purify the non-aqueous solvent to be purified, in which the harmonic-mean particle size of the ion exchange resin is 0.20 to 0.50 mm. According to the present application, a method for purifying a non-aqueous solvent can be provided, the method includes pretreating by removing water in a water-containing ion exchange resin by passing therethrough a non-aqueous solvent for dehydration treatment, in which the amount of the non-aqueous solvent for dehydration treatment used during the pretreating is small.

Abstract: A water treatment system includes: EDI having deionization chamber that deionizes water that contains boron and concentration chambers in which concentrated water flows; and a cooler to cool the water supplied to deionization chamber or the concentrated water supplied to concentration chambers. Alternatively, water treatment system includes EDI having deionization chamber that deionizes water that contains boron, concentration chambers in which concentrated water flows, and electrode chambers in which electrode water flows; a cooler that adjusts temperature of the water or temperature of the concentrated water supplied to concentration chamber; and a controller that controls the cooler such that the cooler adjusts the temperature of the water supplied to deionization chamber or the temperature of the concentrated water supplied to the concentration chambers within a range of 10-23° C.

Abstract: A purification method for separating and purifying an organic solvent from a liquid mixture of an organic solvent and water, the organic solvent having a boiling point of more than 100° C. at 1 atm, includes the steps of: passing the liquid mixture through a first ion exchange device; supplying the liquid mixture discharged from the first ion exchange device to a pervaporation device to selectively separate water component; supplying the organic solvent recovered from the concentration side of the pervaporation device to an evaporator to obtain a purified organic solvent; and passing, through the second ion exchange device, a portion of liquid containing the organic solvent and flowing at a first position subsequent to the first ion exchange device. The liquid discharged from the second ion exchange device is returned to a second position which is at a preceding stage of the pervaporation device.

Abstract: The water outlet of a subsystem that includes an ultraviolet oxidation device and the water inlet of each substrate treatment device are connected to each other via a main pipe. A hydrogen peroxide removal device is installed between the ultraviolet oxidation device of the subsystem and a non-regenerative ion-exchange device. In addition, a carbon dioxide supply device is installed at the middle of a pipe that branches from the water outlet of the subsystem to reach the substrate treatment device. According to an aspect, the hydrogen peroxide removal device is filled with a platinum-group metal catalyst. Thus, ultrapure water passed through the ultraviolet oxidation device is used as a base to produce carbonated water in which the concentration of hydrogen peroxide dissolved therein is limited to 2 ?g/L or less and to which carbon dioxide is added to adjust resistivity to be within the range of 0.03 to 5.0 M?·cm.

Abstract: A monolithic organic porous ion exchanger having a continuous skeleton and continuous pores, wherein the continuous skeleton is formed of an organic polymer being a hydrolysate of a crosslinked polymer of a (meth)acrylic acid ester and divinylbenzene, the organic polymer having any one or both of a —COOH group and a —COONa group as ion-exchange groups, the continuous skeleton has a thickness of 0.1 to 100 ?m, the continuous pores have an average diameter of 1.0 to 1000 ?m, the monolithic organic porous ion exchanger has a total pore volume of 0.5 to 50.0 mL/g, and has a total ion-exchange capacity of the —COOH group and the —COONa group per weight in a dry state of 4.0 mg equivalent/g or more.

Abstract: Provided are a method and system for measuring hydrogen peroxide concentration in sample water collected from a prescribed position in a water treatment process and includes: collecting the sample water; measuring a concentration of a dissolved oxygen in the sample water or a treated water obtained by treating the sample water with the hydrogen peroxide decomposing device by first and second dissolved oxygen concentration measuring analyzers to obtain a corrected value that is a difference between the two dissolved oxygen concentration values; measuring the concentration of the dissolved oxygen in the sample and treated water by the first and second dissolved oxygen concentration measuring analyzers, respectively, and obtaining a measured value that is a difference between the dissolved oxygen concentration values; and calculating a corrected concentration of hydrogen peroxide from the measured value obtained during the measured value obtaining and the corrected value obtained during the corrected value obtai

Abstract: A flocculation and sedimentation apparatus has: sedimentation tank that causes flocs in raw water to be sedimented and separated; sludge concentration tank that is surrounded by sedimentation tank and that collects and concentrates the flocs; and raw water supply mechanism having center line that passes through sludge concentration tank, wherein raw water supply mechanism rotates about center line and supplies the raw water to sedimentation tank. Raw water supply mechanism includes: raw water introducing portion that is located on center line and to which the raw water is introduced, raw water supply port that is open at a lower portion of an inner space of sedimentation tank and that supplies the raw water to sedimentation tank, and pipe portion that communicates both with raw water introducing portion and with raw water supply port and that extends above sludge concentration tank in a direction away from center line.

Abstract: Provided are: a water treatment method that includes at least a denitrification step for denitrifying water to be treated with a denitrifying bacterium in the presence of a hydrogen donor, wherein the denitrification activity of the denitrifying bacterium can be maintained at a high level and thus the treatment speed can be increased; and a water treatment apparatus. The water treatment method includes at least a denitrification step for passing water to be treated through a biological treatment tank and denitrifying the same with a heterotrophic denitrifying bacterium in the presence of a hydrogen donor, wherein: molybdenum is added to the water to be treated to give a concentration of 0.01-1.0 mgMo/gN; a carrier is added to the biological treatment tank; and the nitrogen load to the carrier is controlled to 1.6 kgN/(m3-carrier·d) or greater.

Abstract: A method for purifying an organic solvent has a first treatment of bringing an organic solvent to be treated into contact with an H-type cation exchanger, and a second treatment of bringing a treated liquid from the first treatment into contact with an anion exchanger and an H-type strongly acidic cation exchanger. According to the present application, the provided method and an apparatus for purifying an organic solvent remove metal impurities of both metal species of monovalent and polyvalent metals in the organic solvent.

Abstract: Fine particles that are contained in ultrapure water supplied to a point of use is further reduced. Ultrapure water production system has ultrapure water supply line that is connected to point of uses, wherein ultrapure water flows through ultrapure water supply line; and first ion exchange apparatus, membrane filtration apparatus and second ion exchange apparatus that are arranged in series on ultrapure water supply line. Membrane filtration apparatus is arranged between first ion exchange apparatus and second ion exchange apparatus. At least a part of the ultrapure water that flows out from membrane filtration apparatus is treated by second ion exchange apparatus before the at least a part of the ultrapure water is supplied to point of uses.

Abstract: A water treatment system including: a reverse osmosis membrane device A for treating a water to be treated; a reverse osmosis membrane device E for treating permeated water from device A; a reverse osmosis membrane device B for treating concentrated water from device A or E; a reverse osmosis membrane device C for treating concentrated water from device E or A; and each of water flow lines through which the concentrated water and permeated water from devices A to E respectively flow downstream, wherein the connections of each of the water flow lines are switchable so that while the concentrated water from device E flows to device B to wash device B, the concentrated water from device A is treatable by device C, and while the concentrated water from device E flows to device C to wash device C, the concentrated water from device A is treatable by device B.

Abstract: Provided are a water treatment method and a water treatment device wherein in a biological treatment of ammonium nitrogen-containing water to be treated, the water to be treated can be treated stably at a high treatment speed even when the nitrogen concentration of the water to be treated is high. This water treatment device biologically treats ammonium nitrogen-containing water to be treated. The water treatment device (water treatment method) is provided with: a nitrification device (nitrification step) for oxidizing ammonium nitrogen to nitrite or nitrate nitrogen using nitrifying bacteria including autotrophic ammonia-oxidizing bacteria and nitrite-oxidizing bacteria contained in microbial activated sludge; and a nitrification rate control means which maintains a molybdenum compound in the nitrification device in such a manner as to control the molybdenum concentration of the water to be treated to 0.025 mg Mo/gN or more, and controls the nitrification rate for the sludge to 0.11 [kgN/(kgVSS·day)].

Abstract: A pure-water production device including: a first reverse osmosis membrane device to which water to be treated is supplied; a second reverse osmosis membrane device to which permeated water from the first reverse osmosis membrane device is supplied; an electrodeionization device to which permeated water from the second reverse osmosis membrane device is supplied; a brine tank to which concentrated water from the first reverse osmosis membrane device is supplied; and a third reverse osmosis membrane device connected to the brine tank, wherein the second reverse osmosis membrane device is a high-pressure reverse osmosis membrane device, the brine tank is supplied with at least one concentrated water selected from the group consisting of concentrated water from the second reverse osmosis membrane device and concentrated water from the electrodeionization device, wherein permeated water from the third reverse osmosis membrane device is supplied to water to be treated, is used.

Abstract: The level of cleanliness of a hollow fiber membrane device is evaluated before it is installed in an ultrapure water production system. A method of evaluating the level of cleanliness of the hollow fiber membrane device includes capturing fine particles in permeating water by means of a first filter membrane, wherein the permeating water is ultrapure water that permeates through the hollow fiber membrane device before the hollow fiber membrane device is installed in an ultrapure water production system; and analyzing the fine particles that are captured by the filter membrane.

Abstract: A method for forming a carbon-carbon bond, wherein a reaction is performed by filling a platinum group metal-supported catalyst into a filling container, and passing a raw material liquid through the platinum group metal-supported catalyst in a continuous circulation manner, and wherein the platinum group metal-supported catalyst is a platinum group metal-supported catalyst in which nanoparticles of a platinum group metal with an average particle diameter of 1 to 100 nm are supported on a non-particulate organic porous ion exchanger formed of a continuous framework phase and a continuous pore phase.

Abstract: A method for efficiently treating boron from water to be treated, an apparatus for producing pure water, and a method for producing pure water. An apparatus for removing boron includes a low-pressure reverse osmosis membrane apparatus to which is supplied water to be treated, a pH adjustment apparatus to adjust a pH of permeated water from the low-pressure reverse osmosis membrane apparatus to 5.0 to 9.0, a high-pressure reverse osmosis membrane apparatus to which is supplied the water adjusted by the pH adjustment apparatus, and an electrodeionization to which is supplied permeated water from the high-pressure reverse osmosis membrane apparatus.

Abstract: A water dispenser which is connected to a pure water source and used for dispensing pure water includes: an arm mounting unit; a water dispensing gun including a nozzle for discharging pure water; a holding unit for holding the water dispensing gun; and at least two arms connecting the holding unit to the arm mounting unit. The at least two arms constitute a parallel link mechanism in which a trajectory of each arm when the at least two arms move is within the same vertical plane.

Abstract: An ion exchanger filled cartridge accommodated inside an accommodating container of a metal removing column and in which an ion exchanger is filled is provided. The ion exchanger filled cartridge includes a cylinder portion, an upper lid in which a through hole for a liquid to be treated is formed and which is provided on an upper end of the cylinder portion, a lower lid in which a through hole for a treated liquid is formed and which is provided on a lower end of the cylinder portion, an insertion pipe connected to the lower lid, having an O-ring attached to an outer side, and inserted into a treated liquid discharge pipe provided on a bottom portion of the accommodating container of the metal removing column, and the ion exchanger filled inside the cylinder portion.