Sustainability Assessment Of Carbon Dioxide Emission Reduction From Energy Use In Cement Production Via Life Cycle Assessment And Ahp

The cement industry in supporting sustainable development is faced with the challenge of reducing energy consumption, natural resources and emissions generated from its production activities. PT X is one of the cement industries in Indonesia that has a production design capacity of 2.6 million tons/year. PT X's cement production activities use several fossil fuel energy sources and alternative fuels that can produce carbon dioxide emissions that are wasted into the environment. This study aims to identify process units that produce significant impacts to determine alternative environmental improvement scenarios. The method used is Life Cycle Assessment (LCA) as a tool for calculating potential environmental impacts, and AHP as an alternative selection of environmental improvement program scenarios. The scope of the LCA study carried out with the scope of "Cradle to Gate" includes the stages of the raw material extraction process, the production process to the distribution of cement. The resulting potential environmental impact is a total Global Warming Potential (GWP) of 0.20543 tons CO2 eq/ton. The largest potential impact comes from the kiln unit of 0.20221 tons CO2 eq/ton or an impact contribution of 98.43%. Based on the environmental impacts generated, there are 4 alternative programs that can be used to reduce the environmental impacts generated. The selection of alternative program scenarios is based on 3 criteria based on 3 types of respondents. Alternatif program yang memiliki nilai prioritas tertinggi yaitu alternatif program 1 dengan sebesar 35,5%, 38,1%, dan 23,4%.