Ballast water treatment apparatus

A ballast water treatment system, comprising:

• a plurality of ballast tanks installed in a ship;
• a reaction tank installed outside the plurality of ballast tanks wherein raw water and ozone are imported and made to react with each other for a predetermined period of time to kill microorganisms existing in the raw water;
• a transfer pump installed outside the plurality of ballast tanks and configured to draw and transfer water containing residual ozone from the reaction tank to each one of the one or more ballast tanks;
• one or more inlet pipes installed in fluid communication with the discharge side of the transfer pump to deliver the water transferred by the transfer pump to each one of the plurality of ballast tanks;
• a circulation pump and a circulation pipeline forming a circulation system installed inside each one of the plurality of ballast tanks;
• and
• an ozone decomposer disposed along each one of the respective circulation pipelines, and comprising an element for decomposing and removing ozone contained in the water passing through the decomposer;
• wherein the respective circulation pump is disposed along the respective circulation pipeline and is configured to provide sufficient pump head to circulate the ballast water inside the respective ballast tank within the respective circulation pipeline so as to bring the ballast water into contact with the element in the respective ozone decomposer.

A ballast water treatment system, comprising:

• a plurality of ballast tanks installed in a ship;
• a reaction tank installed outside the plurality of ballast tanks wherein raw water and ozone are imported and made to react with each other for a predetermined period of time to kill microorganisms existing in the raw water;
• a first transfer pump installed outside the plurality of ballast tanks and configured to draw and transfer water containing residual ozone from the reaction tank to one of the plurality of ballast tanks;
• a circulation pump and a circulation pipeline forming a circulation system installed inside the one of the plurality of ballast tanks;
• an ozone decomposer disposed along the circulation pipeline, and comprising an element for decomposing and removing ozone contained in the water passing through the decomposer;
• and
• a second transfer pump configured to draw and transfer treated ballast water rid of the residual ozone from the one of the plurality of ballast tanks to at least one of the remaining ballast tanks;
• wherein the circulation pump is disposed along the circulation pipeline and is configured to provide sufficient pump head to circulate the ballast water inside the one of the plurality of ballast tanks within the circulation pipeline so as to bring the ballast water into contact with the element in the ozone decomposer.