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Editor in Chief: RAFFAELLO COSSU

CHARACTERIZATION OF FINE FRACTIONS FROM LANDFILL MINING: A REVIEW OF PREVIOUS INVESTIGATIONS

  • Juan C. Hernández Parrodi - Department of Environmental and Energy Process Engineering, Montanuniversität Leoben, Austria - NEW-MNE project, Renewi Belgium SA/NV, Belgium
  • Daniel Höllen - Department of Environmental and Energy Process Engineering, Montanuniversität Leoben, Austria
  • Roland Pomberger - Department of Environmental and Energy Process Engineering, Montanuniversität Leoben, Austria

DOI 10.31025/2611-4135/2018.13663

Released under CC BY-NC-ND

Copyright: © 2018 Cisa Publisher

Editorial History

  • Received: 07 Feb 2018
  • Revised: 04 Apr 2018
  • Accepted: 11 Jun 2018
  • Available online: 30 Jun 2018

Abstract

Several landfill mining (LFM) studies have been carried out in recent years all around the world. From these studies qualitative and quantitative information regarding the composition and characteristics of the different fractions excavated from landfills has been obtained. This information comprises data from various landfill sites around the globe from which useful correlations for future LFM projects can be identified. Of particular interest to this paper is the information regarding the fine fractions, which represent to this day a crucial obstacle in the implementation of LFM and enhanced landfill mining (ELFM). The fine fractions make up a considerable portion of the total amount of waste disposed of in landfills. Depending on the particle size chosen as upper limit to define the fines fraction, the portion of this fraction can be as high as 40-80 wt.% of the total excavated waste. These fractions consist of decomposed organic substances, e.g. humic substances, partly weathered mineral waste, e.g. sand, brick fragments, concrete, but also of fine metal particles, especially non-ferrous metals, and still a significant amount of plastics, paper and other calorific fractions. However, although calorific fractions might be used for energy recovery and inorganic fractions for material (especially metal) recovery, current LFM studies are discarding the fine fraction due to lacking or too expensive processing routes. Therefore, it is of critical interest to LFM and ELFM projects to reduce the particle size down to which the excavated material can be processed. This paper, which was elaborated within the framework of the EU Training Network for Resource Recovery through Enhanced Landfill Mining – NEW-MINE, aims to review the obtained data from different LFM studies from municipal solid waste (MSW) landfills, concerning the fines fraction, in order to identify key aspects to be taken into consideration while designing the processing approach in future LFM and ELFM investigations.



Keywords


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