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Related Experiment Videos

Modelling of PCDD/F release from MSW bio-drying.

E C Rada1, A Franzinelli, M Ragazzi

  • 1University of Trento, Department of Civil and Environmental Engineering, Via Mesiano 77, Trento, Italy. elena.rada@ing.unitn.it

Chemosphere
|May 22, 2007
PubMed
Summary
This summary is machine-generated.

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Polychlorinated dibenzodioxins and dibenzofurans (PCDD/F) can be released from municipal solid waste (MSW) during bio-drying. This process, a biological mechanical treatment (BMT), may free PCDD/F from consumed volatile solids.

Area of Science:

  • Environmental Science
  • Waste Management
  • Chemical Engineering

Background:

  • Municipal solid waste (MSW) bio-drying is a biological mechanical treatment (BMT) for dewatering waste using exothermic reactions.
  • Bio-drying enhances refuse-derived fuel (RDF) generation by reducing waste weight and facilitating the removal of non-combustible materials.
  • Limited data exists on polychlorinated dibenzodioxins and dibenzofurans (PCDD/F) emissions from BMT processes.

Purpose of the Study:

  • To investigate the behavior and emission of PCDD/F during MSW bio-drying.
  • To propose a theory explaining PCDD/F enrichment in air exiting biological treatment processes.
  • To account for the influence of initial PCDD/F concentration in ambient air.

Main Methods:

  • Experimentation was conducted to study PCDD/F behavior during MSW bio-drying.

Related Experiment Videos

  • An original theory was developed to explain PCDD/F enrichment in exhaust air.
  • The role of initial PCDD/F concentration and volatile solids consumption was analyzed.

    • Main Results:

    • PCDD/F may be released from volatile solids consumed during the bio-drying process.
    • The concentration of PCDD/F in the waste and the extent of volatile solids consumption influence emission factors.
    • Experimental results support the theory of PCDD/F release linked to volatile solids breakdown.

    Conclusions:

    • The bio-drying of MSW can lead to the release of PCDD/F into the air.
    • Volatile solids consumption during bio-drying is a key factor in PCDD/F emissions.
    • Variations in bio-drying processes explain differing PCDD/F emission factors reported in literature.