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Life cycle impact assessment of the environmental infrastructures in operation phase: Case of an industrial waste incineration plant
Hyeong-Woo Kim1, Kyeong-Ho Kim2, and Hung-Suck Park3
1BK 21 Plus Ulsan eco-industrial park project team, University of Ulsan, Ulsan 44610, Republic of Korea
2Green Manufacturing 3Rs R&D Group, Ulsan Regional Division, KITECH, Ulsan 44413, Republic of Korea
3Department of Civil and Environmental Engineering, University of Ulsan, Ulsan 44610, Republic of Korea
Corresponding Author: Hung-Suck Park ,Tel: +82-52-259-1050, Fax: +82-52-221-0152, Email: parkhs@ulsan.ac.kr
Received: 30 August 2016;  Accepted: 14 February 2017.
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A life cycle impact assessment was applied in an industrial waste incineration plant to evaluate the direct and indirect environmental impacts based on toxicity and non-toxicity categories. The detailed life cycle inventory of material and energy inputs and emission outputs was compiled based on the realistic data collected from a local industrial waste incineration plant, and the Korean life cycle inventory and ecoinvent database. The functional unit was the treatment of 1 tonne of industrial waste by incineration and the system boundary included the incineration plant and landfilling of ash. The result on the variation of the impact by the unit processes showed that the direct impact was decreased by 79.3, 71.6, and 90.1% for the processes in a semi dry reactor, bag filter, and wet scrubber, respectively. Considering the final impact produced from stack, the toxicity categories comprised 91.7% of the total impact. Among the toxicity impact categories, the impact in the eco-toxicity category was most significant. A separate estimation of the impact due to direct and indirect emissions showed that the direct impact was 97.7% of the total impact. The steam recovered from the waste heat of the incineration plant resulted in a negative environmental burden.
Keywords: Direct emission | Environmental impact | Incineration | Indirect emission | Industrial waste | Life cycle assessment
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