Solid-state 13C NMR spectroscopic, chemolytic and biological assessment of pretreated municipal solid waste |
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Authors: | Pichler M Knicker H Kögel-Knabner I |
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Institution: | Lehrstuhl für Bodenkunde, Technische Universit?t München, Freising-Weihenstephan, Germany. |
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Abstract: | In Central Europe, composting and anaerobic digestion of municipal solid waste (MSW) is used as pretreatment before landfilling
to reduce landfill emissions. MSW samples were analyzed before, during, and after pretreatment to assess the stability of
the organic matter. Chemolytic, nuclear magnetic resonance (NMR) spectroscopic, and respiration parameters were correlated
to evaluate a substitution of the time-consuming respiration analysis by chemical parameters. 13C cross polarization magic angle spinning (CPMAS) NMR spectroscopy showed a preferential biodegradation of O-alkyl carbon
(carbohydrates) and a selective accumulation of plastics during all pretreatments, confirming findings from chemolytic analyses.
Principal component analysis exhibited a strong association between the respiration rate, the carbohydrate content, and the
O-alkyl C content, corroborating that carbohydrates are the most important compounds of MSW with regard to the emission potential.
Rank correlation (Spearman) also showed strong relationships between the respiration rate and the content of carbohydrates
(r=0.75) and of O-alkyl C (r=0.72). Journal of Industrial Microbiology & Biotechnology (2001) 26, 83–89.
Received 20 April 2000/ Accepted in revised form 21 July 2000 |
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Keywords: | : solid-state 13C NMR spectroscopy municipal solid waste pretreatment respiration test principal component analysis |
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