지정폐기물 소각공정의 전과정평가(LCA) 연구

Abstract

This study was conducted to identify and evaluate the environmental impacts from inputs and outputs for the incineration facilities of specified wastes. System boundary was from the inflow of wastes to the outflow of residues in the facilities, and the LCA software used was SimaPro 6.0 pro. The gate-to-gate inventory showed that the input amounts of electricity, diesel, water and chemicals were 1.92E-01kWh, 4.13E-03kg, 1.54E+00kg and 1.20E-03kg respectively and the output amounts of CO2, SOx, NOx, bottom ash, fly ash and steam were respectively 2.01E+00kg, 4.74E-03kg, 6.67E-04kg, 2.76E-01kg, 1.45E-02kg, and 1.40E+00MJ in the incineration of 1kg specified wastes. From the weighting results using the Korea LCA methodology of MOCIE, the incineration impact percentages of global warming, abiotic resource depletion and human toxicity showed 93.4%, 4.3% and 1.0% of the total respectively, and CO2 produced from the incineration process was confirmed as the main contribution substance of global warming, C facility with steam production had 86.4% of total environmental impacts based on the incineration impact compared with A & B facilities with non-steam production in the incineration of specified wastes. Therefore the active heat energy recovery from non-steam production facility is preferable to reduce the environmental impacts caused by the incineration because the discharge of CO2 is the inevitable characteristics of the incineration process.