Tohoku University

Kowa Kogyo Co., Ltd.

Japan Basic Material Co., Ltd.

Aqua Impulse Corporation

Yamanishi Corporation

Tsuda Kaiun Co., Ltd.

Yasuaki Kohama

Toshihiko Abe

Akihiro Kijima

Ikuo Chiba

Yoshinobu Yashima

Kouji Onodera

Takayuki Ito

Kouichirou Kanno

Keiki Kano

Masae Suzuki

Michiru Sakamoto

Tetsuya Kanno

Yoshihisa Kurita

Minoru Ikeda

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 invention provides magnesium fuel cells which can prevent the self-discharge of negative electrode materials and can produce electricity stably for a long term. A magnesium fuel cell includes a negative electrode material including a magnesium alloy, and an electrolytic solution for eluting magnesium ions from the negative electrode material. The magnesium alloy contains aluminum and calcium. The electrolytic solution is preferably an aqueous sodium chloride solution, an aqueous sodium hydroxide solution, an aqueous sodium hydrogencarbonate solution, an aqueous sodium percarbonate solution, or a mixture including two or more of these solutions.

Magnesium alloy fuel cell

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

Growing community of inventors

Sendai, Japan

Yasuaki Kohama