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Updated: Jul 16, 2026

Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures
Published on: January 7, 2019
Oxidative biodegradation of dissolved organic matter during composting
D Said-Pullicino1, G Gigliotti
1Department of Agricultural and Environmental Science, University of Perugia, Borgo XX Giugno 72, 06121 Perugia, Italy.
Dissolved organic matter (DOM) is crucial for compost biodegradation. Initially rich in degradable compounds, DOM becomes less biodegradable over time as resistant aromatic substances accumulate.
Area of Science:
- Environmental Science
- Microbiology
- Soil Science
Background:
- Dissolved organic matter (DOM) is the most biologically and chemically active fraction in compost.
- Understanding DOM transformations is key to optimizing composting processes.
Purpose of the Study:
- To detail the chemical and biochemical changes in DOM during oxidative biodegradation in compost.
- To elucidate the mechanisms of soluble organic matter degradation during composting.
Main Methods:
- Analysis of DOM chemical and biochemical characteristics during composting.
- Evaluation of DOM degradability under aerobic conditions.
- Correlation of DOM degradability with microbial oxygen demand.
Main Results:
- Compost DOM is highly degradable initially, dominated by labile carbohydrates, amino acids, and proteins.
- As composting progresses, resistant aromatic compounds accumulate, reducing DOM degradability.
- The decrease in DOM degradability strongly correlates with microbial oxygen demand.
Conclusions:
- The composition of DOM shifts from labile to resistant compounds during composting.
- DOM degradability reduction impacts composting process evaluation.
- Microbial oxygen demand is a key indicator linked to DOM changes.
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