전과정평가를 통한 물리적 정수처리 방법의 환경성 비교 연구

김형석¹, 차경훈¹, 홍준식^*, 남궁은^**, 허탁¹

A comparison study on physical water treatment facilities using LCA

Hyoungseok Kim¹, Kyounghoon Cha¹, Joonsik Hong^*, Eun Namkung^**, Tak Hur¹

¹건국대학교 화학생물공학부

^*수처리선진화사업단

^**명지대학교 환경생명공학과

¹Dept. of Chemical and Biological Engineering, Eco-product and system lab, Konkuk Univ.

^*WATERTECH

^**Dept. of Environmental Engineering and Biotechnology, Myongji Univ.

ⓒ Copyright 2010 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, 2010

Abstract

This study aimed to compare the environmental aspects of different water treatment systems using life cycle assessment (LCA). The target system of this study is the three different physical treatment systems which are sand filtration, pressurized type membrane filtration and immersed type membrane filtration. The key environmental issues in this study are analyzed in terms of abiotic resource depletion (ARD) and global warming potential(GWP). As a result, sand filtration represents the worst environmental impact. In case of GWP, sand filtration is about 17 and 27.5% higher than pressurized type and immersed type membrane filtration. ARD has same trend compare with GWP. Impact of sand filtration is about 16.5 and 27.4% higher than. Most of impacts are caused by electricity which considers 40 years operation time of the system. And we can derive benefit from trading of CO₂ on market. If we sell tons of CO₂ which come from emission reduction, we can earn around 463 thousands and 748 thousands euro from exchange sand filtration for pressurized type and immersed type one. Immersed type by this study is the best choice for reduction of CO₂ and sustainable water supply.