A1 Journal article (refereed), original research

Carbon footprint of different recovery options for the repulping reject from liquid packaging board waste treatment process


Open Access hybrid publication


Publication Details

Authors: Khan Md.Musharof Hussain, Laitinen Vilma, Havukainen Jouni, Horttanainen Mika

Publisher: Elsevier

Publication year: 2021

Language: English

Related journal or series: Waste Management

Volume number: 136

Issue number: 136

Start page: 93

End page: 103

Number of pages: 11

ISSN: 0956-053X

eISSN: 1879-2456

JUFO level of this publication: 2

Digital Object Identifier (DOI): http://dx.doi.org/10.1016/j.wasman.2021.10.003

Permanent website address: https://www.sciencedirect.com/science/article/pii/S0956053X21005328

Open Access: Open Access hybrid publication

Location of the parallel saved publication: http://urn.fi/URN:NBN:fi-fe2021101851388

Research data location: https://www.sciencedirect.com/science/article/pii/S0956053X21005328


Abstract

Liquid packaging board (LPB) is an integral part of storing and transporting liquid food. In addition to its significant advantages, LPB has been challenging the existing waste management sector since its introduction into the market. In most European countries, LPB waste is either incinerated or recycled in the recycling facilities where fibre is recycled, and the repulping reject is separated for incineration. Mechanical recycling and chemical recycling processes are other options for repulping reject treatment. This study used life cycle assessment (LCA) to compare the environmental impacts of three treatment processes, incineration, mechanical recycling and chemical recycling; each was considered with the functional unit of 1 tonne of repulping reject. Furthermore, two sub-scenarios based on the substituted heat produced by energy from the treatment processes were considered. In substituting biomass-based heat sources, chemical recycling generated the lowest greenhouse gas (GHG) emissions, about 560 kg CO2 eq. tonne-1 repulping rejects, followed by the mechanical recycling process (approximately 740 kg CO2 eq. tonne-1 repulping reject). The maximum amount of GHG was emitted from the incineration scenario, which was about 1900 kg CO2 eq. tonne-1 repulping rejects. By substituting natural gas-based
heat sources, chemical recycling generated about 290 kg CO2 eq. tonne-1 repulping rejects. On the contrary, the mechanical recycling process generated about 430 kg CO2 eq. tonne-1 repulping rejects and incineration process generated 960 kg CO2 eq. tonne-1 repulping rejects. Uncertainty analysis showed that some assumptions significantly impact the results; however, the chemical recycling process had the lowest environmental impact in almost all uncertainty analysis.


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Last updated on 2021-08-11 at 09:18