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Related Experiment Video

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Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
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Selective collection as a pretreatment for indirect solid recovered fuel generation.

Elena Cristina Rada1, Marco Ragazzi1

  • 1University of Trento, Department of Civil, Environmental and Mechanical Engineering, via Mesiano 77, I-38123 Trento, Italy.

Waste Management (New York, N.Y.)
|December 25, 2013
PubMed
Summary

Highly effective selective collection (SC) allows residual municipal solid waste (RMSW) to be classified as solid recovered fuel (SRF). Packaging take-back programs (TBPs) enhance SRF quality and minimize landfill waste.

Keywords:
Bio-dryingMunicipal solid wastePretreatmentSelective collectionSolid recovered fuelTakes back programs

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Area of Science:

  • Environmental Science
  • Waste Management
  • Chemical Engineering

Background:

  • Increasing selective collection (SC) in the EU alters residual municipal solid waste (RMSW) composition.
  • RMSW input into treatment plants is becoming less homogeneous due to SC and economic factors.

Purpose of the Study:

  • Analyze the impact of different SC scenarios on solid recovered fuel (SRF) generation.
  • Evaluate SRF quality based on latest regulations, including energy content, Cl, Hg, and respirometric index (RI).
  • Assess the role of packaging take-back programs (TBPs) and bio-drying in waste valorization.

Main Methods:

  • Case study analysis of five SC scenarios (kerbside and drop-off).
  • Assessment of SRF properties against current European regulations.
  • Evaluation of bio-drying suitability and the impact of food waste SC.
  • Analysis of packaging TBPs and their effect on residual waste valorization.

Main Results:

  • Highly efficient SC can enable direct classification of RMSW as SRF, provided RI targets are not overly stringent.
  • Packaging TBPs significantly increase the lower heating value (LHV) of residual RMSW and reduce landfill volumes.
  • Efficient source separation of food waste can reduce its concentration in RMSW, potentially hindering effective bio-drying.

Conclusions:

  • Optimized SC and TBPs are crucial for maximizing SRF production and quality.
  • The respirometric index (RI) plays a role in SRF classification, but its targets need careful consideration.
  • Source separation strategies, particularly for food waste, must be balanced to ensure effective downstream processes like bio-drying.