PROPOSAL OF A FLOATING-TYPE ENVIRONMENTAL PURIFICATION FACILITY INCORPORATING THE FUNCTION OF TIDELAND

Landfill in Tokyo Bay has a direct effect on the disappearance of tideland and shallow waters. Former tideland is a habitat for benthic creatures with the function of decomposing organic substances flowing out from the land area, which were eaten by small fish and served as a feeding point for migratory birds feeding them. Also, in recent years, aquatic plants such as combs forming seaweed beds are being reviewed as being superior to onshore plants in function to absorb CO2 and produce oxygen. In addition, since seaweed is also expected as a fuel for biomass power generation in recent years, this economic value is great. In other words, regenerating tidal flats and seaweed beds in Tokyo Bay will contribute not only to the environmental improvement of the sea area but also to a CO2 reduction as well as alternative energy source, which will greatly contribute to our lives. In this study, we propose a floating type purification facility incorporating the functions of tideland and shallow waters in the northwestern coast of Tokyo Bay and proposing artificial tideland and seaweed bed regeneration.