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Eco-friendly seawater purifier utilizing food-chain

A proven type plant of an environment-friendly seawater purifier utilizing a food-chain in nature has been installed in the east breakwater of the Okinosu Marine Terminal by the Third District Port Construction Bureau of the Ministry of Transport, the Division of Marine Environment Science and Engineering of the Graduate School of Engineering at the University of Tokushima, and the Tokushima Prefecture.
The plant, 3.3 meters in breadth, 3.7 meters in length, 6.5 meters in height and 46 tons in weight, is composed of two types of apparatus, a dry beach type and a rocky beach type. It is a system that dissolves pollutants by bacteria and other microbes which live on the rocks and stones on the beach, and allows marine creatures such as sea slugs and lugworms to eat organic matter called sludge which is produced by the dissolution of pollutants. The new system can be installed at an additional expense of about 5 % of the total construction cost of an existing breakwater, officials say.
The proven type experiment will be continued for three years from January next year.