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

시멘트 제조공정의 폐기물 사용에 따른 시나리오 비교 연구

구희준*, 박은규1, 정찬교1, 최우진1
Hee Jun Koo*, Eun Kyu Park1, Chan Kyo Chung1, Woo Zin Choi1
1수원대학교 환경공학과
*환경청정기술연구센터 445-743 경기도 화성시 봉담읍 와우리 산2-2
1Dept. of Environmental Engineering, The University of Suwon
*Center for Environmental & Clean Technologies San2-2, Wau-ri, Bongdam-eup, Hwaseong-si, Gyeonggi-do 445-743, Korea

ⓒ Copyright 2009 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: Sep 30, 2009

요약문

시멘트 산업에서는 많은 양의 폐기물이 대체연료와 대체원료로 이용되고 있다. 본 연구의 목적은 소성로의 폐기물 재활용과 기존의 처리시스템인 매립이나 소각시스템의 환경영향을 비교평가하고, 주요환경영향을 규명하기 위해 시나리오 분석을 수행하였다. 7개 포틀랜드 시멘트 제조업체를 대 상으로 현장데이터를 수집하였고, 시나리오 A(유연탄 사용), B(천연원료 사용), C(매립/소각/재활 용)의 총환경영향값은 53.4288, 2.0307, 0.00077로 각각 나타나 유연탄 사용에 의한 환경부하가 가 장 높게 나타났다. 시멘트 제조공정의 주요이슈는 소성로에서 배출된 CO2에 의한 지구온난화이며, 순환자원 사용의 환경영향을 비교하기 위한 소성로 재활용과 처리시스템의 시나리오 분석결과 소 성로 재활용이 소각이나 매립처리보다 환경부하가 저감되는 것으로 나타났다.

Abstract

In case of cement industry, large amounts of waste by-products are effectively utilized as alternative sources for fuel and raw materials. The objective of this study is to assess environmental effects on cement manufacturing process in utilization of wastes compared to the alternative waste treatment systems, such as landfill and/or incineration, etc. Both LCI and LCIA were conducted with a perspective of gate to grave as well as scenario analysis in order to figure out more detailed environmentally key issuses. The seven major manufacturing companies were chosen for portland cement - Type I and conducted LCI. Generally, site-specific data was applied. If it's not impossible, database was used. Impact assessment was carried out consecutively as classification, characterization, normalization and weighting by Eco-indicator. The eco-indicators of cement system, scenario A(bituminous coal), B(raw material), C(landfill/incineration/recycling) were 53.4288, 2.0307, 0.00077, respectively. The key issues of cement system is a GWP by CO2 released kiln. The scenario analysis is performed in order to compare the reduction of environmental impact when recycled resources make used of kiln and treatment system. The environmental burden of kiln system is lower than landfill and/or incineration system.

Keywords: 전과정평가; 포틀랜드시멘트; 폐기물; 대체연료; 시나리오분석
Keywords: Life Cycle Assessment; Portland Cement; Waste; Alternative Fuel; Scenario Analysis