DOI QR코드

DOI QR Code

Life Cycle Assessment(LCA) of Rubber Recycling Process in Waste Tire

폐타이어 고무 재활용 공정의 전과정평가 연구

  • Received : 2017.12.26
  • Accepted : 2018.02.13
  • Published : 2018.02.28

Abstract

This study conducted the Life Cycle Assessment(LCA) on waste rubber recycling technology for recovering rubber product from the waste tires. Environmental impacts were assessed for the five categories of impacts: global warming, resource depletion, acidification, eutrophication, photochemical oxide production, and ozone layer depletion. When recycling 1ton of waste tire containing rubber, global warming impact was 1.77E+02 kg $CO_2-eq.$, resource depletion impact was 1.23E+00 kg Sb-eq., acidification impact was 5.92E-01 kg $SO_2-eq.$, eutrophication impact was 1.23E-01 kg $PO{_4}^{3-}-eq.$, photochemical oxide production impact was 3.42E-01 kg $C_2H_4-eq.$, and ozone layer depletion impact was 1.87E-04 kg CFC11-eq. In terms of overall environmental impacts, carbon, softener and electricity the greatest impact, so it is necessary to compare the environmental impacts of the raw materials to replace carbon and softener, and a method to reduce the filler usage in the process is needed. In addition, it is necessary to improve energy efficiency, change to low-energy sources, and apply renewable energy.

본 연구에서는 폐타이어를 재활용하여 고무를 회수하는 폐 고무 재활용 기술에 대한 전과정평가를 실시하였다. 환경 영향은 지구온난화, 자원고갈, 산성화, 부영양화, 광화학적산화물생성, 오존층파괴의 6가지 범주로 나누어 평가하였다. 폐타이어 1ton을 재활용할 때, 지구온난화는 1.77E+02 kg $CO_2-eq.$, 자원고갈은 1.23E+00 kg Sb-eq., 산성화는 5.92E-01 kg $SO_2-eq.$, 부영양화는 1.23E-01 kg $PO{_4}^{3-}eq.$, 광화학적산화물생성은 3.42E-01 kg $C_2H_4-eq.$, 오존층파괴영향은 1.87E-04 kg CFC11-eq.로 환경영향이 나타났다. 전체 환경영향범주에 있어 고무 컴파운딩 공정에서 사용되는 카본, 연화제, 전기가 가장 큰 영향을 미치기 때문에 카본과 연화제의 대체나 사용량 감축 방안이 요구된다. 또한, 에너지 효율을 개선 및 환경영향이 낮은 에너지원으로 변경, 신재생에너지를 적용하는 방안 등을 고려해 보아야 한다.

Keywords

References

  1. Kim Hyeong-Tae, Waste Tire Recycling Technology Trend, KONETIC Report, 2016. 12
  2. Lee Kun-Mo, Tak Hur, Kim, Seungdo, 1998 : Theory and Guidelines for Environmental Life Cycle Assessment (LCA), Korea Accreditation Board.
  3. ISO 14040, 2006 : Environmental management - Life cycle assessment - Principles and framework.
  4. ISO 14044. 2006 : Environmental management - Life cycle assessment - Requirements and guideline.
  5. Korea Environmental Industry & Technology Institute, National LCI(Life Cycle Inventory) database Guideline, 2009.
  6. Environmental declaration of Products LCI Database, www.edp.or.kr
  7. Ecoinvent Database, www.ecoinvent.org