| Budget Amount *help |
¥2,140,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2006: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Research Abstract |
Since plastics are used throughout our societies, the issues surrounding plastic waste have become a typical and symbolic part of the discussion on waste treatment and recycling in a modern society. The most pressing issue is to withdraw from a mass production, mass consumption, mass waste economic system and to create a recycling oriented society. Waste disposal system conventionally reveals many problems, like the difficulty of finding final disposal sites for incinerator residues and the issue of how to recycle waste materials. Some new technologies have been developed to solve these kinds of problems, including ash melting and gasification melting. Resource recycling systems of waste plastics have been developed to explain these kinds of issues, including blast furnace reaction, coke-oven chemical raw material preparation, liquefaction, gasification and material recycling. In this study, environmental impact and costs were determined using Life Cycle Assessment (LCA) and Life Cycle Cost (LCC).
In 2006, we selected representative methods used for ash melting and gasification melting that are used for waste incineration, and determined the amount of environmental lord and costs by LCA and LCC. As a result, it was clear that ash melting system excelled rather than gasification melting system both environmental mad and costs, regardless of amount of waste.
In 2007, we chosen some methods worked for blast furnace reaction, coke-oven chemical raw material preparation, liquefaction, gasification and material recycling which are worked for resource recycling systems of waste plastics, and evaluated the amount of environmental lord and costs. As a result, it was found that gasification method is the best resource recycling system of waste plastics. Although gasification method has very high electricity consumption, this method retrieves the resources. Further gasification method is highly efficient.
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