CONSIDERATION ON EFFICIENT RECOVERY SYSTEM OF USEFUL METALS IN MUNICIPAL WASTE UTILIZING CENTRALIZED REDUCTIVE MELTING

Abstract

 Centralized reduction melting of incineration residues has been put into practical use as one of the efficient methods for recovering metal resources contained in waste. On the other hand, the collection target of small home appliance recycling has not been reached, and the collection efficiency is particularly low in cities with a population of 1 million or more.

 In this study, we have proposed a system that achieves efficiently metal resource recovery equivalent to the collection goal of recycling small household appliances by introducing centralized reduction melting and recovering metal from incineration residue in parts of cities with a population of more than 1 million, where collection efficiency of small household appliances is low. As a result of the evaluation of GHG emissions and trial economic evaluation, although the introduction of centralized reduction melting increased GHG emissions compared to the recycling promotion of small household appliances, the overall cost could be reduced.