Impact of different particle size distributions on anaerobic digestion of the organic fraction of municipal solid waste
Impact of different particle size distributions on anaerobic digestion of the organic fraction of municipal solid waste
Particle size may significantly affect the speed and stability of anaerobic digestion, and matching the choice of particle size reduction equipment to digester type can thus determine the success or failure of the process. In the current research the organic fraction of municipal solid waste was processed using a combination of a shear shredder, rotary cutter and wet macerator to produce streams with different particle size distributions. The pre-processed waste was used in trials in semi-continuous ‘wet’ and ‘dry’ digesters at organic loading rate (OLR) up to 6 kg volatile solids (VS) m?3 day?1. The results indicated that while difference in the particle size distribution did not change the specific biogas yield, the digester performance was affected. In the ‘dry’ digesters the finer particle size led to acidification and ultimately to process failure at the highest OLR. In ‘wet’ digestion a fine particle size led to severe foaming and the process could not be operated above 5 kg VS m?3 day?1. Although the trial was not designed as a direct comparison between ‘wet’ and ‘dry’ digestion, the specific biogas yield of the ‘dry’ digesters was 90% of that produced by ‘wet’ digesters fed on the same waste at the same OLR.
anaerobic digestion, municipal solid waste, organic fraction, particle size reduction, dry shedding, wet maceration
297-307
Zhang, Y.
69b11d32-d555-46e4-a333-88eee4628ae7
Banks, Charles J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
February 2013
Zhang, Y.
69b11d32-d555-46e4-a333-88eee4628ae7
Banks, Charles J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
Zhang, Y. and Banks, Charles J.
(2013)
Impact of different particle size distributions on anaerobic digestion of the organic fraction of municipal solid waste.
Waste Management, 33 (2), .
(doi:10.1016/j.wasman.2012.09.024).
Abstract
Particle size may significantly affect the speed and stability of anaerobic digestion, and matching the choice of particle size reduction equipment to digester type can thus determine the success or failure of the process. In the current research the organic fraction of municipal solid waste was processed using a combination of a shear shredder, rotary cutter and wet macerator to produce streams with different particle size distributions. The pre-processed waste was used in trials in semi-continuous ‘wet’ and ‘dry’ digesters at organic loading rate (OLR) up to 6 kg volatile solids (VS) m?3 day?1. The results indicated that while difference in the particle size distribution did not change the specific biogas yield, the digester performance was affected. In the ‘dry’ digesters the finer particle size led to acidification and ultimately to process failure at the highest OLR. In ‘wet’ digestion a fine particle size led to severe foaming and the process could not be operated above 5 kg VS m?3 day?1. Although the trial was not designed as a direct comparison between ‘wet’ and ‘dry’ digestion, the specific biogas yield of the ‘dry’ digesters was 90% of that produced by ‘wet’ digesters fed on the same waste at the same OLR.
Text
Impact of different particle size distributions on AD of OFMSW _ Zhang and Banks _ scholar text.pdf
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Published date: February 2013
Keywords:
anaerobic digestion, municipal solid waste, organic fraction, particle size reduction, dry shedding, wet maceration
Organisations:
Centre for Environmental Science
Identifiers
Local EPrints ID: 349120
URI: http://eprints.soton.ac.uk/id/eprint/349120
ISSN: 0956-053X
PURE UUID: 5cc88b65-5270-40d7-8949-7255bbc34b39
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Date deposited: 25 Feb 2013 13:54
Last modified: 15 Mar 2024 03:15
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