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Updated: May 8, 2026

Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture
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Biodegradation and flushing of MBT wastes.

A A Siddiqui1, D J Richards, W Powrie

  • 1Department of Civil Engineering, Aligarh Muslim University, Aligarh 202002, India.

Waste Management (New York, N.Y.)
|August 27, 2013
PubMed
Summary

Mechanical-biological treatment (MBT) diverts biodegradable municipal waste (BMW) from landfills. MBT residues show significantly reduced greenhouse gas potential and contaminant leaching compared to raw waste.

Keywords:
BiodegradationFlushingLandfillLeachateMBT wastePretreatment

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Area of Science:

  • Environmental Science
  • Waste Management
  • Geochemistry

Background:

  • Mechanical-biological treatment (MBT) is crucial for diverting biodegradable municipal waste (BMW) from landfills, aiding compliance with regulations like the EU Landfill Directive.
  • Uncertainty persists regarding the long-term pollution risks associated with MBT waste residues when landfilled.

Purpose of the Study:

  • To investigate the residual potential for greenhouse gas generation from MBT waste residues.
  • To assess the leaching of contaminants (organic carbon, ammoniacal nitrogen, heavy metals) from MBT residues under landfill conditions.

Main Methods:

  • Laboratory experiments were conducted on two distinct MBT waste residues.
  • Gas generation potential was measured and compared to raw municipal solid waste (MSW).
  • Leachate analysis was performed to quantify organic carbon, ammoniacal nitrogen, and heavy metal concentrations.

Main Results:

  • Gas generation potential from MBT residues was significantly lower, ranging from 8% to 20% of that from raw MSW.
  • Pretreatment reduced the release of organic carbon, ammoniacal nitrogen, and heavy metals into leachate.
  • Residual carbon content decreased from approximately 320g/kg dry matter in raw MSW to 183–195g/kg dry matter in MBT wastes.

Conclusions:

  • MBT processes substantially reduce the environmental risks associated with landfilled municipal waste.
  • MBT residues exhibit a diminished capacity for greenhouse gas production and contaminant leaching.
  • Further research into MBT waste management is warranted to optimize landfill diversion strategies.