• Title/Summary/Keyword: 코로나 방전형 정전선별

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Development of Material Separation Process for Recycling Waste Coffee Capsules (폐 커피 캡슐의 재활용을 위한 재질분리 공정 개발)

  • Baek, Sang-Ho;Han, Yosep;Kim, Seongmin;Davaadorj, Tsogchuluun;Jeon, Ho-Seok
    • Resources Recycling
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    • v.30 no.3
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    • pp.70-81
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    • 2021
  • This study evaluated the recyclability of waste plastics in used coffee capsules disposed of as municipal waste. For recycling, a new material separation process was developed to remove the coffee grounds through primary crushing, washing, sieving, and secondary crushing, followed by corona discharge electrostatic separation. Furthermore, for the under 10 mm size fraction samples, the aluminum removal and the plastic recovery were 95.4% and 98.3%, respectively, under optimal conditions. In addition, for the 15 mm fraction samples, the aluminum removal and the plastic recovery were 91.3% and 97.2%, respectively. To evaluate the recyclability of the separated waste plastics, the samples were pelleted, and their material properties were analyzed. No hazardous substances were detected, and the results were similar to those for homo-PP. Therefore, it was confirmed tha t sufficient functiona lity existed a s recycled PP. However, owing to the da rk color of the pellets, limited applications to black or dark products are expected.