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Float-sink separation of construction and demolition waste fines
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering. (Waste Science and Technology)ORCID iD: 0000-0003-3755-6419
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering. (Waste Science and Technology)ORCID iD: 0000-0002-9715-975X
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering. (Waste Science and Technology)ORCID iD: 0000-0001-7158-4662
2018 (English)In: Detritus, ISSN 2611-4135, Vol. 3, p. 13-18Article in journal (Refereed) Published
Abstract [en]

Landfilling and waste incineration are two major waste management options. However, due to their carbon content, some wastes may be unsuitable for these systems. Therefore, methods capable of removing organic carbon from wastes should be identified. One of these wastes is represented by construction and demolition fines. In this paper, we investigate the use of water in separating the waste by density, to verify the suitability of this method in the separation of carbon-containing materials, both in lab and field scale tests. The results obtained show that half of the carbon (measured as volatile solids) can be separated. However, this method fails to reliably produce a sink fraction suitable for landfilling, as it continues to be characterized by an excessively high organic material content.

Place, publisher, year, edition, pages
Padova, Italy, 2018. Vol. 3, p. 13-18
Keywords [en]
Construction and demolition waste, Float-sink separation, Density separation, Characterization
National Category
Other Environmental Engineering
Research subject
Waste Science and Technology
Identifiers
URN: urn:nbn:se:ltu:diva-71329DOI: 10.31025/2611-4135/2018.13648ISI: 000474686200004OAI: oai:DiVA.org:ltu-71329DiVA, id: diva2:1258346
Projects
TOOLF
Funder
Mistra - The Swedish Foundation for Strategic Environmental ResearchAvailable from: 2018-10-24 Created: 2018-10-24 Last updated: 2019-08-16Bibliographically approved
In thesis
1. Treatment oriented waste characterization
Open this publication in new window or tab >>Treatment oriented waste characterization
2019 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

New types of materials and products are developed every day, and subsequently, new types of wastes. At the same time, new regulations are put forth to protect human health and the ecosystems from the negative impacts of wastes. Often, the waste management industry is responsible to deal with these problems, and hence, good knowledge about wastes and their treatment is crucial. Waste is normally characterized in order to determine a treatment; however, this usually implies a known treatment method.

This thesis aims to provide a structured approach about how to describe different treatments, and to provide guidance on how to characterize wastes in a solution oriented manner. A distinction is made between two types of treatments: those based on separation processes and those based on transformation processes, as well as combinations of the two. Separation processes are common in mechanical treatment such as sieving or air-classification. Transformation processes are common in such treatments as shredding, electroporation, radiation treatment, and stabilization. Most treatments consist of both a transformation and a separation process, such as incineration, in which the organic carbon is oxidized (transformed) into CO2,that then is separated from the remaining solids. Other examples of combined processes are composting and anaerobic digestion.

A framework is presented that enables a quantitative description of different waste treatments such as anaerobic digestion and incineration in the same context. All transformation processes take place in an environment that can be described by environmental factors such as temperature, pH, redox, radiation etc. By relating different treatments or observations to each other in an n-dimension matrix, it is possible to not only locate the currently known treatments, but also to locate unexplored areas, i.e. combinations of environmental factors that could be used to treat wastes in new ways.

The addition of the n-dimensional framework to the general characterization model, together with the “top down” strategy for characterization provide valuable insights useful for dealing with new types of wastes in an efficient manner.

Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2019. p. 23
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
National Category
Other Environmental Engineering
Research subject
Waste Science and Technology
Identifiers
urn:nbn:se:ltu:diva-71570 (URN)978-91-7790-268-3 (ISBN)978-91-7790-269-0 (ISBN)
Presentation
2019-01-29, F231, Luleå, 10:00 (English)
Opponent
Supervisors
Funder
Mistra - The Swedish Foundation for Strategic Environmental Research
Available from: 2018-11-14 Created: 2018-11-14 Last updated: 2019-07-12Bibliographically approved

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Publisher's full textFLOAT-SINK SEPARATION OF CONSTRUCTION AND DEMOLITION WASTE FINES

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Marklund, ErikAndreas, LaleLagerkvist, Anders

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