講演情報
[2-P3-51]Life cycle assessment of mechanical recycling and utilization for plastic bags of uncontaminated post-industrial polyethylene film in Japan
*KIM AHDO1、Zahari Teuku Naraski2、枝吉 宣輝3、Chou Pin Juo3,4、山本 寿樹3、Chou Pin Yen3,4、齋藤 敬1、McLellan Benjamin2 (1. 京都大学 総合生存学館、2. 京都大学 エネルギー科学研究科、3. 株式会社esa、4. Chuang Tieh Machine)
キーワード：
post-industrial waste、polyethylene、plastic bag、LCA
Petroleum-derived plastics are useful but harmful to the environment. Recycling and bio-based plastics are potential solutions, but environmental impacts must be considered to ensure real benefits. We compared the environmental impact via life cycle assessment of mechanically recycled content from uncontaminated post-industrial polyethylene to virgin and bio-based polyethylene for plastic bags. Results showed that the recycled material, without undergoing decontamination, significantly reduced environmental impacts, making it more eco-friendly than bio-based materials—even when the fossil fuels used in bio-based production are replaced with more sustainable energy sources. This highlights the potential of recycling materials, which were otherwise destined for incineration, without decontamination as a new recycling route.