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Korean Journal of Life Cycle Assessment
The Korea Society for Life Cycle Assessment

Korean J Life Cycle Assess 2017; 18(1):23-34

pISSN: 1229-599X

DOI: https://doi.org/10.62765/kjlca.2017.18.1.23

Article

공정폐액 재활용 기술의 전과정평가 연구

손민정1,*, 차경훈1, 안중우2, 최아란2, 오영민3, 조봉규4, 조영주4
Life Cycle Assessment(LCA) on Recycling Technology of Waste Organic Solvents
Min Jung Son1,*, Kyoung Hoon Cha1, Joong Woo Ahn2, Aran Choi2, Yeong Min Oh3, Bong Gyoo Cho4, Young Ju Cho4
1에코에이블컨설팅(주)
2성신여자대학교
3㈜다남이엔이
4유용자원재활용기술개발사업단
1Ecoable Consulting Corporation
2Sungshin Women’s University
3Danam-ene co., ltd.
4R&D Center for Valuable Recycling
*교신저자: 손민정 팀장 (05064) 서울특별시 광진구 자양번영로 72 2층 Tel: 02-6959-3840, Fax:070-4327-7279, Email: mjson@ecoable.co.kr

ⓒ Copyright 2017 The Korea Society for Life Cycle Assessment. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Published Online: Oct 31, 2017

Abatract

This study conducted the Life Cycle Assessment(LCA) of recycling technology for recovering precious metal(gold, silver) from the waste organic solvents generated in production process of LCD, semiconductor, etc. Environmental impacts were assessed for the five categories of impacts: global warming, resource depletion, acidification, eutrophication, and photochemical oxide production. When recycling 1L of waste organic solvents, global warming impact was 5.26E-02 kg CO2-eq., resource depletion impact was 3.06E-04 kg Sb-eq., acidification impact was 1.31E-04 kg SO2-eq., eutrophication impact was 9.70E-05 kg PO43--eq., and the photochemical oxide production impact was 5.82E-05 kg C2H4-eq. In terms of overall environmental impacts, electricity and KCN contribute the greatest impact, so it is necessary to improve energy efficiency, change to low-energy sources, and apply renewable energy. In addition, it is necessary to compare the environmental impacts of the raw materials to replace the KCN, and a method to reduce the KCN usage in the process is needed.