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Influence of different factors in the life cycle assessment of mixed municipal solid waste management systems – A comparison of case studies in Finland and China

Liikanen, Miia; Havukainen, Jouni; Hupponen, Mari; Horttanainen, Mika (2017)

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Liikanen_Influence_of_different_factors_final_draft.pdf (958.1Kb)
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Post-print / Final draft

Liikanen, Miia
Havukainen, Jouni
Hupponen, Mari
Horttanainen, Mika
2017

Journal of Cleaner Production

154

June 2017

389-400

Elsevier

School of Energy Systems

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© Elsevier 2017
https://doi.org/10.1016/j.jclepro.2017.04.023
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2018092736725

Tiivistelmä

The life cycle assessment (LCA) of municipal solid waste (MSW) management systems is typically rather arduous due to extensive data acquisition needed to calculate the direct and avoided emissions of the systems. A possibility to diminish the workload of the LCA studies is to utilise default or generic data instead of direct and case-specific data. However, it is crucial to know when this is justified. Direct and case-specific data should be applied at least to the key processes and parameters which have the strongest influence on the total results, whereas default data can be applied to the processes and parameters which have only a minor influence on the total results.

Mixed MSW management systems in the South Karelia region, Finland, and the city of Hangzhou, China, were compared in this study in terms of the influence of different factors on the LCA results of the systems. The comparison focused particularly on the influence of individual parameters on the global warming, acidification and eutrophication potentials of the LCA studies. According to the study, parameters directly related to the generation and collection of landfill gas, the energy and fossil carbon content of mixed MSW, energy production efficiencies, as well as the nitrogen oxide and sulfur dioxide emissions of incineration had the highest influence on the total results in both case studies, and therefore direct, case-specific data should be applied particularly to them. The use of machinery in landfilling, the electricity and chemical consumption in leachate treatment, the transportation of auxiliary materials (e.g. chemicals and incineration residues) as well as the electricity consumption and the use of machinery in bottom and boiler ash treatment had instead only a minor influence on the total results. Default or generic data could be applied to them to diminish the workload of the LCA studies. It is worth mentioning that the findings of the study apply merely to these particular case studies. Further research and corresponding comparisons are required to draw more profound and general conclusions.

Lähdeviite

Liikanen, M., Havukainen, J., Hupponen, M., Horttanainen, M. (2017). Influence of different factors in the life cycle assessment of mixed municipal solid waste management systems – A comparison of case studies in Finland and China. Journal of Cleaner Production, Vol 154, Issue June 2017. p. 389-400. DOI: 10.1016/j.jclepro.2017.04.023

Alkuperäinen verkko-osoite

https://www.sciencedirect.com/science/article/pii/S0959652617307229?via%3Dihub
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