Abstract
In January 1997, the oil tanker “Nakhodka” spilled about 6, 200 kl of heavy oil into Japan Sea. The spilled oil was followed by mechanical and chemical techniques. Usually, physical properties of spilled oil change rapidly due to the hydrodynamic and environmental conditions, and its viscosity increases quickly. Finally, spilled oil becomes high viscosity substance such as mousse. In case of Nakhodka, mechanical recovery methods such as dredger, vacuum track and concrete placer showed good results in recovering of high viscosity oil. This paper reports the experimental results on more effective recovery method through systematic experiments.
