| Abstract |
As a response to climate change, all industries are making efforts to reduce greenhouse gas (GHG) emissions for carbon neutrality in our society. The waste recycling sector is making efforts in reducing GHG emissions in connection with the circular economy. The Korean government enacted the Framework Act on Resource Cir-culation and is making efforts to convert waste into renewable materials. This study proposed a method for systematic evaluation and management of material efficiency measurement and GHG emissions for analysis of the effects of recycling of industrial wastes. It focuses on recycled materials rather than recycling waste by applying the methods of material flow analysis and life cycle assessment. As a target for the feasibility analysis of the proposed method, slag, which has the largest amount of generated industrial waste, was selected. The GHG emissions in converting the generated slag into cement ingredient, recycled aggregates, aluminum ingot, zinc ingot, steel ingredient, and silicate fertilizer were calculated. Additionally, the GHG reduction effect by con-verting the sources of GHG emission throughout the entire life cycle of recycled materials into a renewable energy source was calculated. Actually, 1 ton of six recycled materials generated 30.1 kgCO2eq., 23.21 kgCO2eq., 351.0 kgCO2eq., 337.0 kgCO2eq., 27.6 kgCO2eq., and 30.1 kgCO2eq., respectively. Also, six recycled materials were analyzed to potentially reduce GHG emissions of 81.8%, 75.6%, 87.1%, 88.6%, 77.9%, 81.8%, respectively. |