Evolution of organic matter during composting of different organic wastes assessed by CPMAS {sup 13}C NMR spectroscopy

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Waste Management

DOI:https://doi.org/10.1016/j.wasman.2010.09.020· OSTI ID:21550346

Caricasole, P ^[1]; Hatcher, P G ^[1]; Senesi, N ^[2]

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1. Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA 23529 (United States)
2. Dipartimento di Biologia e Chimica Agroforestale ed Ambientale, Universita di Bari, Via G. Amendola 165/a, 70126 Bari (Italy)

In this paper, the evolution of organic matter (OM) during composting of different mixtures of various organic wastes was assessed by means of chemical analyses and CPMAS {sup 13}C NMR spectroscopy measured during composting. The trends of temperatures and C/N ratios supported the correct evolution of the processes. The CPMAS {sup 13}C NMR spectra of all composting substrates indicated a reduction in carbohydrates and an increase in aromatic, phenolic, carboxylic and carbonylic C which suggested a preference by microorganisms for easily degradable C molecules. The presence of hardly degradable pine needles in one of the substrates accounted for the lowest increase in alkyl C and the lowest reduction in carbohydrates and carboxyl C as opposite to another substrate characterized by the presence of a highly degradable material such as spent yeast from beer production, which showed the highest increase of the alkyl C/O-alkyl C ratio. The highest increase of COOH deriving by the oxidative degradation of cellulose was shown by a substrate composed by about 50% of plant residues. The smallest increases in alkyl C/O-alkyl C ratio and in polysaccharides were associated to the degradation of proteins and lipids which are major components of sewage sludge. Results obtained were related to the different composition of fresh organic substrates and provided evidence of different OM evolution patterns as a function of the initial substrate composition.

• OSTI ID: 21550346
• Journal Information: Waste Management, Journal Name: Waste Management Journal Issue: 3 Vol. 31; ISSN WAMAE2; ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AROMATICS
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
CARBOHYDRATES
CARBON
CARBON 13
CARBON ISOTOPES
CELLULOSE
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COMPOSTING
CONIFERS
DISPERSIONS
ELEMENTS
EUMYCOTA
EVEN-ODD NUCLEI
FUNGI
HYDROXY COMPOUNDS
ISOTOPES
LIGHT NUCLEI
LIPIDS
MAGNETIC RESONANCE
MANAGEMENT
MATERIALS
MATTER
MICROORGANISMS
MIXTURES
NMR SPECTRA
NONMETALS
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ORGANIC COMPOUNDS
ORGANIC MATTER
ORGANIC WASTES
OXIDATION
PHENOLS
PINES
PINOPHYTA
PLANTS
POLYSACCHARIDES
PROCESSING
RESONANCE
SACCHARIDES
SEWAGE
SEWAGE SLUDGE
SLUDGES
SPECTRA
STABLE ISOTOPES
SUBSTRATES
TREES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
YEASTS