Jfe Engineering Corporation

Yukihiko Okamoto

Shigeki Fujiwara

Masanori Nagafuji

Yusuke Shimono

Koji Fuchigami

Keisuke Nakahara

Masakuni Inoko

Sho Ishida

A ballast water treatment device includes an oxidant supply amount control device in which a storage unit stores a relationship between an absorbance of a raw water for a ballast and a dissolved organic carbon concentration thereof and another relationship between the dissolved concentration and a residual oxidant concentration required after a predetermined time from an oxidant supply, to kill organisms and to suppress their regrowth in the ballast. A calculation unit derives the required residual oxidant concentration corresponding to the absorbance measured by a meter by referring to the relationships and calculates a target oxidant supply amount using the required residual oxidant concentration. For the target, a control unit controls an oxidant supply device.

Ballast water treatment device and ballast water treatment method

The present invention relates to an apparatus for treating ballast water, the apparatus being capable of treating ballast water so as to meet the ballast water standard established by the IMO exactly at low costs. The treatment apparatus of the present invention comprises a filter () that filters sea water to trap aquatic organisms, a bactericide supply apparatus () that supplies bactericide to the filtrate sea water, and a venturi tubethat introduces the sea water to which the bactericide is added, to produce cavitation in the sea water, thereby diffusing the bactericide and also damaging and destroying aquatic organisms in the sea water.

Apparatus for treating ballast water and method for treating ballast water

Growing community of inventors

Chiyoda-ku, Japan

Yukihiko Okamoto