Abstract
Recycling waste refrigerator plastics can effectively reduce waste accumulation and carbon emissions. This study firstly applied the combination of electrostatic separation and magnetic separation in the waste refrigerators production line to recycle High-impact polystyrene (PS) and acrylonitrile butadiene styrene (ABS) plastics. A cradle-to-gate LCA study of recycling plastic from waste refrigerators was conducted. A carbon emission accounting system for the life cycle of waste plastic recycling was established, each emission unit was identified, the environment impact was analyzed. The results show that disposing waste polyurethane (PU) has the great impacts on eco-toxicity, and the use of high-power machines and Kraft paper packaging has great impacts on resources. The greenhouse gas emission generated during the life cycle is 8.53 kg·CO2eq/kWh. The greenhouse gas emission by recycling1kg ABS and HIPS was 2.59 kg·CO2eq/kWh and 1.84 kg·CO2eq/kWh, which is 84.35% and 61.61% less than producing virgin ABS and HIPS plastic from petrochemical industry. From 2016 to 2030, recycling waste refrigerators can reduce the total of 6452.06 kt waste plastics and greenhouse gas emissions by 370,350 tons. This study provides a scientific basis for exploring waste plastic recycling strategies and promoting green transition of the plastic industry.
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