Abstract

The Amagasaki Canal is an enclosed waters located in innermost recesses of Osaka Bay. In this areas, we confirmed that the canal have been polluted and increased the sedimentation of organic matter because the canal is sheltered waters with artificial vertical structures and is affected by waste water from factories. According to theconsumption of oxygen by the organic mud, there is anoxic water in the bottom of the canal. In this study, a field experiment for clarification on the adjustability of the new aeration technique was executed. A basic performance of the diffused aeration based on microscopic bubble was evaluated. Consequently, the control methods of the aeration system and the prevention of marine biofouling in fall were clarified.

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