Effect of moisture on disintegration kinetics during anaerobic digestion of complex organic substrates

The role of the moisture content and particle size (PS) on the disintegration of complex organic matter during the wet anaerobic digestion (AD) process was investigated. A range of total solids (TS) from 5% to 11.3% and PS from 0.25 to 15 mm was evaluated using carrot waste as model complex organic...

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Bibliographic Details
Published in:Waste management & research 2014-01, Vol.32 (1), p.40-48
Main Authors: Liotta, Flavia, d’Antonio, Giuseppe, Esposito, Giovanni, Fabbricino, Massimiliano, Frunzo, Luigi, van Hullebusch, Eric D, Lens, Piet NL, Pirozzi, Francesco
Format: Article
Language:English
Subjects:
Anaerobiosis
Biodegradation
Biofuels
Calibration
Daucus
Daucus carota
Earth Sciences
Kinetics
Mathematical models
Methane - biosynthesis
Models, Theoretical
Moisture content
Organic chemicals
Particle Size
Refuse Disposal - methods
Sciences of the Universe
Studies
Substrates
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Summary:The role of the moisture content and particle size (PS) on the disintegration of complex organic matter during the wet anaerobic digestion (AD) process was investigated. A range of total solids (TS) from 5% to 11.3% and PS from 0.25 to 15 mm was evaluated using carrot waste as model complex organic matter. The experimental results showed that the methane production rate decreased with higher TS and PS. A modified version of the AD model no.1 for complex organic substrates was used to model the experimental data. The simulations showed a decrease of the disintegration rate constants with increasing TS and PS. The results of the biomethanation tests were used to calibrate and validate the applied model. In particular, the values of the disintegration constant for various TS and PS were determined. The simulations showed good agreement between the numerical and observed data.
ISSN:0734-242X
1096-3669
DOI:10.1177/0734242X13513827