抄録
In recent years, the formation of a recycling society has been promoted in Japan, and many studies have been conducted in an attempt to recycle resources and circulate them. However, energy loss always accompanies a material cycle because the materials used as products deteriorate, become mixed and diffuse, so in order to circulate such materials it becomes necessary to collect them, to separate them, and to extract poisonous substances from them, etc. This study will show, based on the material flow in Japan, that energy loss occurred at each stage of the material cycle, from resources to raw materials, from raw materials to products, from products to wastes and particularly from wastes to recycled resources. And this study will also show that the amount of materials that could be recycled is about 10 % (about 200 million tons) of the entire amount of materials used in Japan (about 2 billion tons), and to recycle such amount of materials could be accompanied by a great deal of energy loss from the viewpoint of the increase of entropy and Separative Work Unit (SWU). o, whereas that in the effluent from the production reactor was maintained at high value. This system permitted to continuously produce the cyst cells with high astaxanthin content.
