미분류 열가소성 범용수지 폐기물 재자원화의 환경영향 저감효과 분석

Abstract

This study conducted the environmental load comparative analysis between unclassified thermoplastic wastes incineration/landfill and recycled thermoplastic blocks manufacturing with considering the avoided burden effects of concrete bricks manufacturing by using the LCA methodology and quantitatively calculated the environmental advantages of recycling unclassified thermoplastic blocks manufacturing. As a result of the environmental impact assessment of the recycling unclassified thermoplastic blocks manufacturing, ODP was decreased by 1.49E-05 kg CFC-11-eq./unit, and the reduction ratio was 99.95% which implies removing most of all environmental impact. POCP also decreased by 1.64E+00 kg C2H4-eq./unit, and the reduction ratio was 99.88%. AP also was decreased by 2.30E+01 kg SO2-eq./unit, and the reduction ratio was 97.92%. EP also was decreased by 2.79E+00 kg PO43--eq./unit and the reduction ratio was 96.86%. The reduced amount of GWP also was 1.49E+03 kg CO2-eq./unit and the reduction ratio was 83.77%. But, ADP was decreased by 1.92E-01 kg Sb-eq./unit and the reduction ratio was 15.09% which is the least reduction effect among the six environmental impact categories. The results of this study imply that recycling unclassified thermoplastic wastes can eliminate most of all environmental impacts in the four categories (ODP, POCP, AP, and EP) compared to thermoplastic waste incineration/landfill. In particular, the reduction of CO2 emission can be visualized at the same level as the amount of annual greenhouse gas absorption of 634 pine trees or 421 oak trees. The implications derived from this study have a clear purpose as macroscopic basis data for the necessity of recycling waste thermoplastics and business strategy, and this suggests the possibility of derivative research through a more sophisticated data collection process in future research.