Ballast water purification system

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PROBLEM TO BE SOLVED : other areas or adverse influence on the ecosystem of ceanic prevent fishery damage can, moreover, also adhering to the inside wall of the ballast water tank ship ballast water purification system can be prevented. SOLUTION : to the ballast water purification system, a seawater ballast water from the outside of the vessel 4 is introduced into the pipe line system W0, ballast water conduit system 4 arranged in the processing unit 5 is purified by passing the water in the ballast water tank 3, 3 of a ship or ballast water from a ballast water tank W is introduced into the ballast water conduit system 4, processor 5 is purified by passing the outside of the vessel 1 in which the ballast water purification system, the treating device 5, a rod in the tube body adjacent an other rare earth magnet due to magnetic pole opposite to the magnetic array are arranged so as to oppose, flow along the interior constituted by magnetic processing unit 15 and, antibacterial treatment of ballast water or seawater, and a main element and antibacterial treatment unit 16. Selected drawing : fig. 2