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Molecular character...
Molecular characterization of particulate organic matter in full scale anaerobic digesters : An NMR spectroscopy study
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- Shakeri Yekta, Sepehr (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten,Biogas Solutions Research Center
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- Hedenström, Mattias, 1976- (author)
- Umeå universitet,Kemiska institutionen,Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
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- Svensson, Bo (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten,Biogas Solutions Research Center
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- Sundgren, Ingrid (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten,Biogas Solutions Research Center
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- Dario, Mårten (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten,Biogas Solutions Research Center
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- Enrich-Prast, Alex (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten,Biogas Solutions Research Center
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- Hertkorn, Norbert (author)
- Helmholtz Center Munich, German Research Center for Environmental Health, Research Unit Analytical Biogeochemistry, 85764 Neuherberg, Germany
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- Björn, Annika (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten,Biogas Solutions Research Center
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(creator_code:org_t)
- ELSEVIER, 2019
- 2019
- English.
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In: Science of the Total Environment. - : ELSEVIER. - 0048-9697 .- 1879-1026. ; 685, s. 1107-1115
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https://umu.diva-por... (primary) (Raw object)
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https://doi.org/10.1...
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Abstract
Subject headings
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- This study assesses the molecular characteristics of particulate organic matter (POM) in agricultural and food waste digesters and elucidates the molecular properties of the recalcitrant POM fraction, which remains in the digestate after AD process. Molecular properties of POM in influent (substrate) and effluent (digestate) of seven full-scale AD plants (three agricultural waste and four food waste digesters) were characterized and compared using solid-state (13)C( )cross-polarization magic angle spinning (CP-MAS) and solution-state H-1,C-13 heteronuclear single-quantum coherence (HSQC) nuclear magnetic resonance (NMR) spectroscopy. Comparison of the POM structural compositions of substrate and digestate from each AD plant revealed an enrichment of protein structures relative to the carbohydrates in most cases, implying a preferential degradation of the carbohydrates over proteins and/or increase of microbial biomass upon AD of agricultural and food wastes. Distinctive molecular structures of labile and recalcitrant fractions of POM, subjected to AD, were identified by comparing the NMR spectra of all substrate and digestate POM. Accordingly, the labile POM fraction in food and agricultural solid wastes is characterized by structural entities of lipids and starch-like carbohydrates, whereas recalcitrant POM structures resemble alkyl and aromatic subunits of amino acids, lignin, and polysaccharides with beta-glycosidic linkages. This information serves as a basis to further explore optimization approaches for improving AD of the underutilized POM and the fate of organic matter in digestate-amended arable lands. (C) 2018 The Authors. Published by Elsevier B.V.
Subject headings
- NATURVETENSKAP -- Kemi -- Organisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Organic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
Keyword
- Anaerobic digestion
- Food waste
- Agricultural waste
- Organic matter
- NMR
- Digestate
Publication and Content Type
- ref (subject category)
- art (subject category)
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