MULTI-CRITERIA DECISION MAKING METHODS FOR COMPARING THREE MODELS OF ALUMINUM INGOT PRODUCTION THROUGH LIFE CYCLE ASSESSMENT

作者：Zare R; Izadikhah M^*

来源：Applied Ecology and Environmental Research, 2017, 15(3): 1697-1715.

DOI：10.15666/aeer/1503_16971715

• environment
• secondary aluminum
• primary aluminum
• LCA
• Entropy method
• ELECTRE method

The aim of this study is to compare the potential environmental impacts of three kinds of aluminum: primary aluminum ingot (A), secondary aluminum ingot (B) and to mix aluminum ingot (C) with each other. For this purpose, the life cycle assessment model is developed based on damage oriented approach. For each unit process, the reference flow is 500 kg. The results show that model "A" has the highest impacts in all categories, model "B" is intermediate and the model "B" is the most environmentally friendly process. As a surprising result model "B" has the highest amount for fluoride, BTEX and VOC compared with the models "A" and "C" as air emission. Finally with regard to all aspects, model "B" or mixed aluminum is selected as the preferable option. The most important reasons for this selection are energy savings, low refining required and low demand for specially landfill operation with regarding Iran as a developing country. Also we examine further this subject by applying the Entropy and ELECTRE methods.

• 出版日期2017