Water quality monitoring method and water quality monitoring system of ballast water

摘要

PROBLEM TO BE SOLVED: To provide a water quality monitoring method of ballast water capable of monitoring the water quality of the ballast water and discharging the ballast water in a state that references are surely met without measuring the water quality in a ballast tank.SOLUTION: A water quality monitoring method of ballast water includes: a step of taking the ballast water in a ship; a step of treating the taken ballast water by extinguishing and/or separating and removing microorganisms therein; a step of transporting the treated ballast water to a ballast tank; a storage step of transporting part of the treated ballast water to a mimetic ballast tank to store during the step of transporting the treated ballast water to the ballast tank; and a microorganism measuring step of sampling part of the ballast water stored in the mimetic ballast tank and measuring the number of microorganisms.