Washing of waste prior to landfilling

► Waste washing treatment to reduce the waste leaching fraction prior to landfilling. ► Application on residues produced in the MSW management and on special waste. ► Washed waste will likely exhaust its environmental impacts prior to raw wastes. The main impact produced by landfills is represented...

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Bibliographic Details
Published in:Waste management (Elmsford) 2012-05, Vol.32 (5), p.869-878
Main Authors: Cossu, Raffaello, Lai, Tiziana
Format: Article
Language:English
Subjects:
Applied sciences
ASR, MBT
Automobiles
Biological Oxygen Demand Analysis
Environment
Exact sciences and technology
Final storage quality
General treatment and storage processes
Laboratories
Models, Theoretical
Nitrogen
Other wastes and particular components of wastes
Plastic sorting process residues
Plastics
Pollution
Refuse Disposal - methods
Sustainable landfilling
Urban and domestic wastes
Waste washing
Wastes
Water Pollutants, Chemical
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Summary:► Waste washing treatment to reduce the waste leaching fraction prior to landfilling. ► Application on residues produced in the MSW management and on special waste. ► Washed waste will likely exhaust its environmental impacts prior to raw wastes. The main impact produced by landfills is represented by the release of leachate emissions. Waste washing treatment has been investigated to evaluate its efficiency in reducing the waste leaching fraction prior to landfilling. The results of laboratory-scale washing tests applied to several significant residues from integrated management of solid waste are presented in this study, specifically: non-recyclable plastics from source separation, mechanical–biological treated municipal solid waste and a special waste, automotive shredded residues. Results obtained demonstrate that washing treatment contributes towards combating the environmental impacts of raw wastes. Accordingly, a leachate production model was applied, leading to the consideration that the concentrations of chemical oxygen demand (COD) and total Kjeldahl nitrogen (TKN), parameters of fundamental importance in the characterization of landfill leachate, from a landfill containing washed wastes, are comparable to those that would only be reached between 90 and 220years later in the presence of raw wastes. The findings obtained demonstrated that washing of waste may represent an effective means of reducing the leachable fraction resulting in a consequent decrease in landfill emissions. Further studies on pilot scale are needed to assess the potential for full-scale application of this treatment.
ISSN:0956-053X
1879-2456
DOI:10.1016/j.wasman.2011.12.005