Spectroscopic characterization of organic matter of a soil and vinasse mixture during aerobic or anaerobic incubation

Doelsch Emmanuel, Masion Armand, Cazevieille Patrick, Condom Nicolas. 2009. Spectroscopic characterization of organic matter of a soil and vinasse mixture during aerobic or anaerobic incubation. Waste Management, 29 (6) : pp. 1929-1935.

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Abstract : Mineralization potentials are often used to classify organic wastes. These methods involve measuring CO2 production during batch experiments, so variations in chemical compounds are not addressed. Moreover, the physicochemical conditions are not monitored during the reactions. The present study was designed to address these deficiencies. Incubations of a mixture of soil and waste (vinasse at 20% dry matter from a fermentation industry) were conducted in aerobic and anaerobic conditions, and liquid samples obtained by centrifugation were collected at 2 h, 1 d and 28 d. Dissolved organic carbon (DOC) patterns highlighted that: there was a "soil effect" which increased organic matter (OM) degradation in all conditions compared to vinasse incubated alone; and OM degradation was faster under aerobic conditions since 500 mg kg-1 of C remained after aerobic incubation, as compared to 4000 mg kg-1 at the end of the anaerobic incubation period. No changes were detected by Fourier transform infrared spectroscopy (FTIR) between 2 h and 1 d incubation. At 28 days incubation, the FTIR signal of the aerobic samples was deeply modified, thus confirming the high OM degradation. Under anaerobic conditions, the main polysaccharide contributions (v(C-O)) disappeared at 1000 and 1200 cm-1, as also confirmed by the 13C NMR findings. Under aerobic incubation, a 50% decrease in the polysaccharide proportion was observed. Under anaerobic conditions, significant chemical modifications of the organic fraction were detected, namely formation of low molecular weight organic acids. (Résumé d'auteur)

Mots-clés Agrovoc : Vinasse, Matière organique du sol, Déchet organique, Matière organique, Spectrométrie, Spectroscopie infrarouge, Spectroscopie RMN, Anaérobiose, Aérobiose

Mots-clés géographiques Agrovoc : France

Classification Agris : P33 - Soil chemistry and physics
Q70 - Processing of agricultural wastes
U30 - Research methods
F04 - Fertilizing

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Doelsch Emmanuel, CIRAD-PERSYST-UPR Recyclage et risque (FRA) ORCID: 0000-0002-7478-4296
  • Masion Armand, CEREGE (FRA)
  • Cazevieille Patrick, CIRAD-PERSYST-UPR Recyclage et risque (FRA)
  • Condom Nicolas, CIRAD-PERSYST-UPR Recyclage et risque (FRA)

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