Kabushiki Kaisha Toshiba

Shinya Miyamoto

Masaaki Kaneko

Takaaki Murata

Yumi Yaita

Seiichi Murayama

Tatsuaki Sato

Masaru Okamoto

Yoshinari Takamatsu

Masumitsu Toyohara

Toshiaki Sugimori

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

Raw material of algae cultivating medium molded body is manufactured by mixing a mixture containing inorganic material, curing material and algae cultivating nutriment, molding the mixture to molded bodies and curing the molded bodies. The molded bodies are manufactured such that the molded bodies are water floatable having a closed cavity inside the body, or containing density decreasing material for example. The manufacturing method enables to produce algae cultivating medium that can float on water in a large quantity. Industrial waste such as coal ashes and incineration ashes, sands and crushed shells can be used as the inorganic raw material of the medium. As the curing material which solidify the molded body, other than cement, algae cultivating nutriment such as phosphorus compounds can be used. Extrusion molding can favorably be applied for molding molded body. A cylindrically molded body can be sealed the both edges thereof to form a cavity portion inside thereof. A disintegration molding after preparatory molding, or agitation molding can also be used as molding step of this manufacturing method. Further, waste heat of a thermal power plant or an incinerator that produce inorganic material as wastes can be used for curing the molded body.

Method of producing algae cultivating medium

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Koganei, Japan

Shinya Miyamoto