Comparison between Different Products by Disassembly System Design with Parts Selection for Cost, Recycling and CO2 Saving Rates Using Multi-objective Optimization

Abstract

Recently, to prevent environmental issues such as natural resource depletion and global warming, recycling for assembly products is expected to promote both material recovery from End-of-Life products and reduction of CO_2 volumes in new production. In order to realize economical recycling, recycling factories select to disassemble or dispose each part depending on the recycling rate and cost. Furthermore, it is necessary for disassembly lines to allocate all disassembly tasks to each disassembly work station in order to minimize the number of disassembly work stations. Igarashi et al. (2015) proposed a modeling and design of multi-objective optimization of disassembly systems for minimization of disassembly costs and maximization of recycling rate and maximization of CO_2 saving rate in the case of cleaners. However, different trends may appear in the disassembly system design when other types of assembly products are recycled. This study adopts the disassembly system design by multi-objective optimization for lower disassembly cost, higher recycling and CO_2 saving rates with the environmental and economic parts selection to the cell phone case. In addition, the influence on the disassembly system design by the difference of product type is discussed.