Comparison of mesophilic and thermophilic anaerobic digestion of sugar beet pulp: performance, dewaterability and foam control
Comparison of mesophilic and thermophilic anaerobic digestion of sugar beet pulp: performance, dewaterability and foam control
Digestion of sugar beet pulp was assessed in relation to biogas and methane production, foaming potential, and digestate dewaterability. Four 4-litre working volume digesters were operated mesophilically (37 ±0.5 °C) and four thermophilically (55±0.5 °C) over three hydraulic retention times. Digesters were operated in duplicate at organic loading rates (OLR) of 4 and 5 g volatile solids l-1 day-1 without water addition. Thermophilic digestion gave higher biogas and methane productivity than mesophilic and was able to operate at the higher OLR, where mesophilic digestion showed signs of instability. Digestate dewaterability was assessed using capillary suction time and frozen image centrifugation. The occurrence of, or potential for, stable foam formation was assessed using a foaming potential test. Thermophilic operation allowed higher loadings to be applied without loss of performance, and gave a digestate with superior dewatering characteristics and very little foaming potential.
anaerobic digestion, sugar beet pulp, digestate, dewatering, foam formation
202-211
Suhartini, Sri
212ccf73-c118-45ac-84c5-15adf23a928b
Heaven, Sonia
f25f74b6-97bd-4a18-b33b-a63084718571
Banks, Charles J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
January 2014
Suhartini, Sri
212ccf73-c118-45ac-84c5-15adf23a928b
Heaven, Sonia
f25f74b6-97bd-4a18-b33b-a63084718571
Banks, Charles J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
Suhartini, Sri, Heaven, Sonia and Banks, Charles J.
(2014)
Comparison of mesophilic and thermophilic anaerobic digestion of sugar beet pulp: performance, dewaterability and foam control.
Bioresource Technology, 152, .
(doi:10.1016/j.biortech.2013.11.010).
Abstract
Digestion of sugar beet pulp was assessed in relation to biogas and methane production, foaming potential, and digestate dewaterability. Four 4-litre working volume digesters were operated mesophilically (37 ±0.5 °C) and four thermophilically (55±0.5 °C) over three hydraulic retention times. Digesters were operated in duplicate at organic loading rates (OLR) of 4 and 5 g volatile solids l-1 day-1 without water addition. Thermophilic digestion gave higher biogas and methane productivity than mesophilic and was able to operate at the higher OLR, where mesophilic digestion showed signs of instability. Digestate dewaterability was assessed using capillary suction time and frozen image centrifugation. The occurrence of, or potential for, stable foam formation was assessed using a foaming potential test. Thermophilic operation allowed higher loadings to be applied without loss of performance, and gave a digestate with superior dewatering characteristics and very little foaming potential.
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e-pub ahead of print date: 14 November 2013
Published date: January 2014
Keywords:
anaerobic digestion, sugar beet pulp, digestate, dewatering, foam formation
Organisations:
Water & Environmental Engineering Group
Identifiers
Local EPrints ID: 360005
URI: http://eprints.soton.ac.uk/id/eprint/360005
ISSN: 0960-8524
PURE UUID: c6d36323-d0fb-434a-b155-06e1b2f88d28
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Date deposited: 21 Nov 2013 08:50
Last modified: 15 Mar 2024 02:52
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Author:
Sri Suhartini
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