Tohoku University

Kowa Kogyo Co., Ltd.

Japan Basic Material Co., Ltd.

Aqua Impulse Corporation

Yamanishi Corporation

Tsuda Kaiun Co., Ltd.

Akihiro Kijima

Yasuaki Kohama

Ikuo Chiba

Toshihiko Abe

Yoshinobu Yashima

Kouji Onodera

Keiki Kano

Kouichirou Kanno

Takayuki Ito

Tetsuya Kanno

Yoshihisa Kurita

Minoru Ikeda

Masae Suzuki

Provided is a multi-tube nozzle for use in eradicating harmful aquatic organisms, which physically kills harmful aquatic organisms while feeding water and thus allows intake water to be fed directly into a culture tank or a ballast tank without the need for a pretreatment tank, chemicals, neutralizers, etc. A multi-tube nozzle (A) for use in eradicating harmful aquatic organisms includes at least three nozzle tubes () that are provided adjacent to each other. The nozzle tubes () each includes: an inlet-side opening section () having an inner diameter that decreases from an inlet opening toward a throat section () located in the middle of the tube; an outlet-side opening section () having an inner diameter that increases from the throat section () toward an outlet opening; and the throat section () having a smallest inner diameter. The adjacent nozzle tubes () are spaced apart by a distance such that the adjacent inlet-side opening sections () overlap each other. A wall () of an overlapping portion () of the inlet-side opening sections () is cut in a U shape. An uncut portion () between the adjacent U-shaped cut portions () forms a sword-like pointed tip.

Multi-tube nozzle for use in eradicating harmful aquatic organisms

The present invention provides ballast water treatment equipment which can decompose fungicide included in ballast water and reduce the amount of use of fungicide adsorbing material by passing through the ballast water. The ballast water treatment equipment for supplying ballast water to a ballast tank through a fungicide adding device, comprises:

Ballast water treatment equipment, a ballast water detoxifying treatment system using the same, and a method for treating the ballast water

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Sendai, Japan

Akihiro Kijima