Assessing amendment properties of digestate by studying the organic matter composition and the degree of biological stability during the anaerobic digestion of the organic fraction of MSW |
| |
Authors: | Fulvia Tambone,Pierluigi Genevini,Giuliana D&rsquo ImporzanoFabrizio Adani |
| |
Affiliation: | Dipartimento di Produzione Vegetale, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy |
| |
Abstract: | The transformation of organic matter during anaerobic digestion of mixtures of energetic crops, cow slurry, agro-industrial waste and organic fraction of municipal solid waste (OFMSW) was studied by analysing different samples at diverse points during the anaerobic digestion process in a full-scale plant. Both chemical (fiber analysis) and spectroscopic approaches (13C CPMAS NMR) indicated the anaerobic digestion process proceeded by degradation of more labile fraction (e.g. carbohydrate-like molecules) and concentration of more recalcitrant molecules (lignin and non-hydrolysable lipids). These modifications determined a higher degree of biological stability of digestate with respect to the starting mixture, as suggested, also, by the good correlations found between the cumulative oxygen uptake (OD20), and the sum of (cellulose + hemicellulose + cell soluble) contents of biomasses detected by fiber analysis (r = 0.99; P < 0.05), and both O–alkyl-C (r = 0.98; P < 0.05) and alkyl-C (r = −0.99; P < 0.05) measured by 13C CPMAS NMR. |
| |
Keywords: | Anaerobic digestion Organic matter Digestate 13C CPMAS NMR Biological stability |
本文献已被 ScienceDirect 等数据库收录! |
|