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Optimizing green waste composting with iron-based Fenton-like process.

Wenjing Xiao1, Lu Zhang1

  • 1College of Forestry, Beijing Forestry University, Beijing 100083, PR China.

Bioresource Technology
|September 19, 2024
PubMed
Summary
This summary is machine-generated.

Modified Fenton-like processes significantly improved lignocellulose degradation in green waste composting. Sodium percarbonate modification notably enhanced lignin, cellulose, and hemicellulose breakdown by boosting beneficial bacteria.

Keywords:
Bacterial community structureEnzyme activityFe(3)O(4) nanoparticlesLignocellulose degradationReactive oxygen species

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Area of Science:

  • Environmental Science
  • Microbiology
  • Biotechnology

Background:

  • Refractory lignocellulose in green waste (GW) poses a composting challenge.
  • Iron-based Fenton-like processes offer potential for lignocellulose degradation.

Purpose of the Study:

  • To assess the impact of conventional and modified iron-based Fenton-like processes on lignocellulose degradation in GW composting.
  • To identify the most effective modification for enhancing lignocellulose breakdown and microbial community structure.

Main Methods:

  • Application of a conventional iron-based Fenton-like process (Fe3O4 nanoparticles and H2O2).
  • Testing three modified Fenton-like processes using Fe3O4 nanoparticles with oxalic acid, sodium percarbonate, or Phanerochaete chrysosporium.
  • Quantification of lignocellulose degradation rates and analysis of bacterial community abundance.

Main Results:

  • The iron-based Fenton-like process modified with sodium percarbonate showed the most significant lignocellulose degradation.
  • Lignin, cellulose, and hemicellulose degradation increased by 49.8%, 39.3%, and 26.2% respectively, compared to the control.
  • This process also enhanced the relative abundance of lignocellulose-degrading bacteria, including Firmicutes and Bacteroidota.

Conclusions:

  • Iron-based Fenton-like process modified with sodium percarbonate is highly effective for lignocellulose degradation in GW composting.
  • This approach optimizes composting efficiency and promotes beneficial microbial communities.
  • Findings provide insights into reactive oxygen species dynamics and the application of Fenton-like processes in waste management.