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Assessing total and volatile solids in municipal solid waste samples.

M Peces1, S Astals, J Mata-Alvarez

  • 1a Department of Chemical Engineering , University of Barcelona , C/Martíi Franquès, 1, 6th floor, 08028 Barcelona , Spain.

Environmental Technology
|September 23, 2014
PubMed
Summary
This summary is machine-generated.

Optimizing municipal solid waste analysis, this study found that lower drying temperatures for total solids (TS) increase analysis time. For volatile solids (VS), slow heating ramps and sample crushing prevent underestimation.

Keywords:
municipal solid wastesmoulderingtemperaturetotal solidsvolatile solids

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Area of Science:

  • Environmental Science
  • Waste Management
  • Analytical Chemistry

Background:

  • Municipal solid waste (MSW) treatment presents a global challenge.
  • Accurate measurement of total solids (TS) and volatile solids (VS) is crucial for biological treatment processes.
  • Standard methods for TS and VS determination may have limitations in terms of time, accuracy, and laboratory conditions.

Purpose of the Study:

  • To evaluate the impact of different drying temperatures on TS determination.
  • To investigate the effect of various heating ramps and sample preparation on VS analysis.
  • To identify optimized methods for accurate and efficient TS and VS quantification in MSW.

Main Methods:

  • TS determination using standard methods with variations in drying temperatures (105°C, 70°C, 50°C).
  • VS determination using different heating ramps from room temperature to 550°C.
  • Comparison of smouldering versus slow heating ramps for VS analysis, including the effect of crushing sample cores.

Main Results:

  • TS can be accurately determined at 105°C or 70°C, but 70°C significantly increases oven residence time (48h to 144h).
  • Smouldering for VS determination can lead to underestimation due to pyrolysis products from carbonization.
  • Slow heating ramps effectively prevent carbonization and underestimation of VS.
  • Crushing sample cores reduces analysis time and minimizes potential VS underestimation.

Conclusions:

  • Lowering drying temperatures for TS analysis (e.g., 70°C) is feasible but increases the time required for analysis.
  • Optimized VS determination involves using slow heating ramps to avoid carbonization and sample crushing to expedite the process.
  • These findings offer improved methodologies for the reliable and efficient characterization of MSW components.