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Environmental Impact of Plastic Recycling in Terms of Energy Consumption: A Comparison of Japan’s Mechanical and Chemical Recycling Technologies

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  • Chaoxia Shan

    (Graduate School of Environment and Energy Engineering, Waseda University, Tokyo 1620041, Japan)

  • Andante Hadi Pandyaswargo

    (Environmental Research Institute, Waseda University, Tokyo 1620041, Japan)

  • Hiroshi Onoda

    (Graduate School of Environment and Energy Engineering, Waseda University, Tokyo 1620041, Japan)

Abstract

In Japan, mechanical plastic recycling has been widely practiced. In recent years, the chemical recycling method has been gaining interest, especially due to its high-quality products similar to virgin materials. Understanding the environmental impact of both methods from the energy consumption standpoint is crucial so that attempts to preserve plastic resources can be based in the most energy-sustainable way. This research aims to determine the environmental impact of mechanical recycling and two types of chemical recycling technologies (coke oven and gasification) by analyzing their energy usage and environmental loads. The results relating to the electricity consumption and water usage show that mechanical recycling results in a 17% share of global warming potential (GWP), coke oven 51%, and gasification 32%. Although mechanical recycling results in a lower GWP, chemical recycling yields highly valuable products and byproducts that can be reused in its processes, such as steam and industrial water, reducing the overall environmental load. These recovered materials are also potentially useful for other industrial processes in an industrial symbiosis ecosystem.

Suggested Citation

  • Chaoxia Shan & Andante Hadi Pandyaswargo & Hiroshi Onoda, 2023. "Environmental Impact of Plastic Recycling in Terms of Energy Consumption: A Comparison of Japan’s Mechanical and Chemical Recycling Technologies," Energies, MDPI, vol. 16(5), pages 1-15, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:5:p:2199-:d:1079428
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    References listed on IDEAS

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