Katayama Chemical, Inc.

Mitsui Engineering and Shipbuilding Company Limited

The Japan Association of Marine Safety

M.o. Marine Consulting, Ltd.

Shinko Ind. Ltd.

Marine Technology Institute Co., Ltd.

Laboratory of Aquatic Science Consultant Corporation

Takuro Tabuchi

Yoshiharu Wakao

Takashi Mizumori

Takeaki Kikuchi

Yasuo Fukuyo

A method for treating ship ballast water in which aquatic organisms in the ship ballast water are exterminated by adding hydrogen peroxide or a compound producing hydrogen peroxide in an amount such that a hydrogen peroxide concentration comes to be 10 to 500 mg/L to the ship ballast water, and then providing physical means for causing shear strength and/or cavitation to the ship ballast water.

Method for treating ship ballast water

A method for treating ship ballast water in which organisms viable in the ship ballast water are exterminated by adding to the ship ballast water hydrogen peroxide or a compound producing hydrogen peroxide in an amount such that a hydrogen peroxide concentration comes to be 10 to 500 mg/L and at least one type selected from a ferrous ion or a compound supplying ferrous ion in an amount such that a ferrous ion concentration comes to be 0.1 to 400 mg/L, catalase in an amount such that a concentration of catalase comes to be 0.5 to 2,500 unit/L and iodine or a compound supplying iodine amount such that an iodine concentration comes to be 0.1 to 100 mg/L.

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Osaka, Japan

Takuro Tabuchi