Abstract
Organic matter stabilization resulted from the decrease of cellulose, xylan, arabinan, acetyl groups, glucuronic acids, galacturonic acids (easily biodegradable fractions) and the increase of lignin (resistant compound) and humic substances coming from the initial wastes have been studied. A central composite experimental design was used to investigate the influence of environmental composting parameters (moisture, aeration and particle size) on organic matter evolution. The organic matter evolution was clearly influenced by the studied composting parameters. All results were concordant, with an increase of humic substances and lignin and a decrease of the rest of the cellulose and hemicellulose compounds. Lower cellulose, xylan, acetyl groups and glucuronic acids contents (higher degradation) have been observed under low particle size (1 cm) and higher moisture content (70%). However lower lignin and higher humic substances under medium (3 cm) to low particle size and low moisture content (40%) have been found.
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