Environmental impact assessment of recycled PET textile using LCA methodology
SUN Guang-ya1, WANG Ya-jun1, XU Tong-guang1, CAO Xin2, CHEN Qing-hua3, ZHUANG Ling-feng3
1. College of New Energy and Materials, China University of Petroleum, Beijing 102249, China; 2. School of Economics and Management, China University of Petroleum, Beijing 102249, China; 3. Engineering Research Center of Polymer Green Recycling, Ministry of Education, Fujian Normal University, Fuzhou 350007, China
Abstract：Based on the rational of life cycle assessment (LCA), this paper proposes to allocate the environmental impact exerted by PET recycled products otherwise wasted and calculate the environmental loads brought by the manufacturing process using recycling technology and original technology, through using the approach of economic value allocation and the cut-off principle. Moreover, this study conducts normalization and sensitivity analysis of LCA modeling for the manufacturing process. The results show that comparing with the original technology, the PET recycling technology can bring about a reduction of 1640kg of greenhouse gas emissions and 40400MJ of non-renewable energy. Besides, environmental indicators such as Human Toxicity Potential, Eutrophication Potential and Marine Aquatic Ecotoxicity Potential was decreased respectively. Among the six fabrication processes, in-situ reactive compatibilization had the greatest contribution to the total environmental loads, and the consumption of electricity and glycidyl methacrylate should be the key factors to improve.
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