船舶バラスト水処理システムの性能評価手法構築のための研究

概要

論文の詳細を見る
To minimize the risk to the environment and to human health arising from the transfer of harmful aquatic organisms and pathogens through the discharge of ship's ballast water, an international treaty has been adopted, February 2004. The installation of a ballast water processing system, which complies with the standard of the treaty, is required for ships constructed after 2009. In this study, transfer examples of aquatic organisms in a past and the actual circumstances in ballast tank are investigated. Mud precipitating in the ballast tank, and microorganisms in the mud were observed. Method of processing and development situation were also investigated. Via various methods ; such as Ultraviolet irradiation (UV), electrolytic, ozone and specialized pipes have been developed. By developing a test plant to demonstrate of ballast water processing, and using anthracite filtrating, the basic data of characteristics of marine organism filtration were obtained. The unit showed an effective removal of the microorganisms, excepting pathogens, from the natural seawater. The effect to the coating film and structure steel in using the biocides was investigated and whitening of a part of coating material was observed. In addition, the fundamental burden of the ballast water treatment was also examined. The burden is big since the quantity of the ballast water is abounding.
2009-06-30