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Article

Characterization of Excavated Waste of Different Ages in View of Multiple Resource Recovery in Landfill Mining

DESTEC—Department of Energy, Systems, Territory and Construction Engineering, University of Pisa, via C.F. Gabba 22, 56122 Pisa, Italy
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Sustainability 2020, 12(5), 1780; https://doi.org/10.3390/su12051780
Received: 1 February 2020 / Revised: 21 February 2020 / Accepted: 23 February 2020 / Published: 27 February 2020
(This article belongs to the Special Issue Municipal Solid Waste Management in a Circular Economy)
With the aim of examining the forcing factors in postmanagement landfills, in this study, excavation waste from nonhazardous municipal waste landfill in Tuscany was characterized for the first time. The specific objective was to estimate the feasibility of sampling and analyzing the excavated waste in order to define its properties and provide information about possible landfill mining projects. Based on the biochemical methane potential assays, it was shown that the excavated waste had not yet been stabilized (i.e., with a production of 52.2 ± 28.7 NlCH4/kgTS) in the landfill, probably due to the low excavated waste moisture content (36% ± 6% w/w). Furthermore, excavated waste has a high calorific value, i.e., 15.2 ± 4.1 MJ/kg; the quantity of combustibles in the industrial shredder waste (16 MJ/kg) was rather modest compared to that of municipal solid waste (20.8 MJ/Kg). In conclusion, during large scale excavation of the landfill, it was possible to evaluate how a dedicated treatment plant could be designed to treat and select waste which might appear in a different category. For excavated industrial waste, detailed mechanical sorting may be convenient for end-of-waste recovery to improve calorific value. View Full-Text
Keywords: waste characterization; municipal solid waste; landfill mining; biochemical methane potential; lower heating value; excavated waste waste characterization; municipal solid waste; landfill mining; biochemical methane potential; lower heating value; excavated waste
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MDPI and ACS Style

Pecorini, I.; Iannelli, R. Characterization of Excavated Waste of Different Ages in View of Multiple Resource Recovery in Landfill Mining. Sustainability 2020, 12, 1780. https://doi.org/10.3390/su12051780

AMA Style

Pecorini I, Iannelli R. Characterization of Excavated Waste of Different Ages in View of Multiple Resource Recovery in Landfill Mining. Sustainability. 2020; 12(5):1780. https://doi.org/10.3390/su12051780

Chicago/Turabian Style

Pecorini, Isabella, and Renato Iannelli. 2020. "Characterization of Excavated Waste of Different Ages in View of Multiple Resource Recovery in Landfill Mining" Sustainability 12, no. 5: 1780. https://doi.org/10.3390/su12051780

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