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Waste Management & Research, Vol. 10, No. 5, 435-443 (1992)
DOI: 10.1177/0734242X9201000506

Seasonal Effects On Anaerobic Digestion of the Source Sorted Organic Fraction of Municipal Solid Waste

Franco Cecchi

Dipartimentao Scienze Ambientali, Università di Venezia, Calle Larga S. Marta 2137, 30123 Venezia, Italy

Joan Mata-Alvarez

Departament Enginyeria Quimica, Universitat de Barcelona, C/ Marti i Franques 1, Pta. 6. 08028 Barcelona, Spain

Paolo Pavan

Dipartimentao Scienze Ambientali, Università di Venezia, Calle Larga S. Marta 2137, 30123 Venezia, Italy

Giovanni Vallini

CNR—Centro di Studio per la Microbiologia del Suolo, Via del Borghetto, 80-56100 Pisa, Italy

Fabrizio De Poli

ENEA, CRE Casaccia P.O. BOX 2400-00100 Roma, Italy

The effects of seasonal temperature change on the quality of easily degradable organic matter in municipal solid waste was monitored and the related influence on the anaerobic digester performance examined. It was verified that increased external temperature caused the transformation of the ethanol contained in the source-sorted organic fraction of municipal solid waste fed to the digester, into acetate. This transformation has been associated with a remarkable effect on the process kinetics of substrate utilization. Thus, the kinetic constant for the first order substrate utilization model in the summer (external temperature greater than 18-20°C) doubled with respect to the winter, although the digester was held at 35±2°C throughout.

Key Words: Anaerobic digestion • solid waste • seasonal effects temperature • process • kinetics


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[Abstract] [PDF]