Kabushiki Kaisha Toshiba

Seiichi Murayama

Norimitsu Abe

Takeshi Ide

Kie Kubo

Shojiro Tamaki

Takahiro Soma

Takeshi Matsushiro

Futoshi Kurokawa

Kenji Taguchi

Kotaro Iyasu

Masao Kaneko

Hiroyuki Suzuki

Nobuyoshi Kaiga

Akira Morikawa

Akira Hiramoto

Takumi Hayashi

Shinji Kobayashi

Kenji Takeuchi

Koichi Matsui

Masaaki Kaneko

Setsuo Suzuki

Akihiko Shirota

Takaaki Murata

Yumi Yaita

Katsuya Yokokawa

Ryo Namba

Hideaki Yamagata

Ryoichi Arimura

Toshiaki Sugimori

Hiroyuki Tokimoto

Shinya Miyamoto

Yuka Hiraga

Masumi Nakadate

A treatment method for a used ion exchange resin, includes: bringing a used ion exchange resin into contact with a reaction solution, the used ion exchange resin having an ion exchange group with at least a radionuclide or a heavy metal element adsorbed thereon, and the reaction solution containing an iron compound, hydrogen peroxide, and ozone; separating at least a part of the reaction solution in contact with the used ion exchange resin from the used ion exchange resin; and decomposing an organic component contained in the reaction solution separated from the used ion exchange resin.

Treatment method for used ion exchange resin

According to one embodiment, a membrane filtration system includes a raw water tank, a pretreatment membrane module, a raw water feed line, a high-pressure RO membrane module, a high-pressure line, a preceding power recovery unit which pressurize the pretreated water by transmitting the pressure of the concentrate to the pretreated water, a succeeding power recovery unit which pressurize the raw water by transmitting a remaining pressure of the concentrate to the raw water, a concentrate discharge line, a first pressure transmission line communicating to the power recovery unit by being branched from the high-pressure line, a second pressure transmission line communicating to the power recovery unit by being branched from the raw water feed line, and a valve provided in the drain line to regulate a discharge of the concentrate from the power recovery unit in accordance with a pressure loss in the pretreatment membrane module.

Membrane filtration system

According to one embodiment, an apparatus for measuring hydroxyl radicals that measures hydroxyl radicals produced by irradiating a liquid to be treated flowing through a channel in which an ultraviolet lamp is arranged with ultraviolet rays, the apparatus includes a diverting unit, a reagent adding unit, and a measuring unit. The diverting unit has a diverting channel that diverts the liquid to be treated before being irradiated with the ultraviolet rays from the channel and part of which is arranged at a position enabling the liquid to be treated within the channel to be irradiated with the ultraviolet rays. The reagent adding unit adds a hydroxyl radical measuring reagent to the diverted liquid to be treated. The measuring unit irradiates the diverted liquid to be treated with the ultraviolet rays and measures the amount of hydroxyl radicals produced based on a change in the hydroxyl radical measuring reagent between before and after the irradiation with the ultraviolet rays.

Apparatus for measuring hydroxyl radicals and liquid treatment apparatus

According to one embodiment, an ultraviolet water treatment apparatus includes an ultraviolet lamp unit provided with a first plumbing flange coupling on each of both ends thereof, and further provided therein with an ultraviolet irradiation tube including an ultraviolet lamp and a lamp protective tube configured to protect the ultraviolet lamp, and a cleaning device drive unit provided with a second plumbing flange coupling on each of both ends thereof and configured to drive a cleaning device configured to clean a surface of the lamp protective tube. The ultraviolet lamp unit and the cleaning device drive unit are coupled with each other on the first and second plumbing flange couplings.

Ultraviolet water treatment apparatus

Disclosed is a water treatment system including a raw water tank, a module which includes a filtration membrane, a feed pump, a filtered water tank, a backwash pump which flows filtered water backward from the filtered water tank to the module, a valve and a channel which switch the direction of the water flow between the forward and reverse directions, a controller which suspends the supply of raw water from the raw water tank to the module, switches the valve and channel to the reverse direction, makes the backwash pump to supply filtered water from the filtered water tank to the module thereby backwashing the filtration membrane, and washing drainage treatment line including which treats backwashing drainage generated by backwashing of the filtration membrane, and returns the water to the raw water tank.

Water treatment system

An ultraviolet irradiation water treatment apparatus includes a vessel having a cylindrical side portion, and plural rod-shaped ultraviolet lamps are disposed in parallel with a central axis of the side portion in the vessel. A water inlet pipe through which water flows into the vessel is provided in an outer wall of the side portion at a position in a tangential direction of an inner periphery of the side portion.

Ultraviolet irradiation water treatment apparatus

A water treatment system that performs a water purifying treatment by use of ultraviolet radiation, comprises a front stage ultraviolet radiation device for radiating ultraviolet light in a front stage process in a water purifying treatment process, a rear stage ultraviolet radiation device for radiating ultraviolet light in a rear stage process, and a controller for controlling these ultraviolet radiation devices.

Ultraviolet radiation water treatment system

A water treatment control system for minimizing trihalomethane formation includes chlorine injection equipment having a plurality of chlorine injectors (), a fluorescence analyzerprovided on the upstream of the chlorine injectors, and a water flowmeterAn chlorine injection rate necessary to reduce a trihalomethane formation potential is calculated by a chlorine injection rate calculating apparatusbased on a measured value from the fluorescence analyzerAn chlorine injection amount from the chlorine injectors is controlled by chlorine injection amount control apparatusesbased on the chlorine injection rate and a measured value from the flowing water flowmeter

Water treatment control system for minimizing trihalomethane formation

A UV-assisted advanced-ozonation water treatment system comprises a water treating tank, an ozonic water tank, an ozonized gas generator, and a UV light sourcedisposed in the water treating tankand having a UV-radiating surface, and an ozonic water jetting device including jetting nozzlesfor jetting the ozonic water onto the UV-radiating surface of the UV light source. An ozonized gas diffusing deviceis placed in the ozonic water tank. An ozonized gas generated by the ozonized gas generatorand compressed by a compressorat a pressure in the range of about 2 to about 3 kg/cmis diffused into the ozonic water tankby the ozonized gas diffusing device. A high-pressure, a high-ozone-concentration ozonic water produced in the ozonized water tankis jetted through the jetting nozzlesonto the UV-radiating surface

UV-assisted advanced-ozonation water treatment system and advanced-ozonation module

A water treatment control system using a fluorescence analyzer includes an activated carbon injection equipment having an activated carbon injector , a fluorescence analyzer provided on the upstream of the activated carbon injector , and a flowing water flowmeter An activated carbon injection rate necessary to reduce a trihalomethane formation potential is calculated by an activated carbon injection rate calculating apparatus based on a measured value from the fluorescence analyzer An activated carbon injection amount from the activated carbon injector is controlled by an activated carbon injection amount control apparatus based on the activated carbon injection rate and a measured value from the flowing water flowmeter

Water treatment control system using fluorescence analyzer

Growing community of inventors

Fuchu, Japan

Seiichi Murayama