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Anaerobic digestion of two biodegradable municipal waste streams

Anaerobic digestion of two biodegradable municipal waste streams
Anaerobic digestion of two biodegradable municipal waste streams
Landfill avoidance for organic wastes is now a high priority worldwide. Two fractions of the municipal waste stream were considered with respect to their potential for diversion through controlled anaerobic digestion. The physical and chemical properties of source segregated domestic food waste (ss-FW) and of the mechanically-recovered organic fraction of municipal solid waste (mr-OFMSW) were analysed, and their methane yields determined in both batch and semi-continuous digestion. Methane potentials were compared with predicted values based on biochemical composition, elemental analysis and carbon mass balance, and the differences explained by compositional analysis of feedstocks and digestates. The ss-FW had a higher percentage biodegradability and higher energy potential on a dry weight basis due to the high proportion of proteins and fats in this waste, although the energy potential of the mr-OFMSW was slightly higher on a wet weight (WW) basis. The mr-OFMSW showed very stable digestion characteristics, whereas the ss-FW had a high digestate ammoniacal-N concentration and volatile fatty acid accumulation leading to some process instability. Digestates from semi-continuous trials with mr-OFMSW had high concentrations of potentially toxic elements (PTE) and a lower nutrient content than ss-FW digestate, making the former unsuitable for application to land used in food production
municipal solid waste, food waste, methane potential, calorific value, nutrients, toxic elements
0301-4797
166-174
Zhang, Yue
69b11d32-d555-46e4-a333-88eee4628ae7
Banks, Charles J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
Heaven, Sonia
f25f74b6-97bd-4a18-b33b-a63084718571
Zhang, Yue
69b11d32-d555-46e4-a333-88eee4628ae7
Banks, Charles J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
Heaven, Sonia
f25f74b6-97bd-4a18-b33b-a63084718571

Zhang, Yue, Banks, Charles J. and Heaven, Sonia (2012) Anaerobic digestion of two biodegradable municipal waste streams. Journal of Environmental Management, 104, 166-174. (doi:10.1016/j.jenvman.2012.03.043).

Record type: Article

Abstract

Landfill avoidance for organic wastes is now a high priority worldwide. Two fractions of the municipal waste stream were considered with respect to their potential for diversion through controlled anaerobic digestion. The physical and chemical properties of source segregated domestic food waste (ss-FW) and of the mechanically-recovered organic fraction of municipal solid waste (mr-OFMSW) were analysed, and their methane yields determined in both batch and semi-continuous digestion. Methane potentials were compared with predicted values based on biochemical composition, elemental analysis and carbon mass balance, and the differences explained by compositional analysis of feedstocks and digestates. The ss-FW had a higher percentage biodegradability and higher energy potential on a dry weight basis due to the high proportion of proteins and fats in this waste, although the energy potential of the mr-OFMSW was slightly higher on a wet weight (WW) basis. The mr-OFMSW showed very stable digestion characteristics, whereas the ss-FW had a high digestate ammoniacal-N concentration and volatile fatty acid accumulation leading to some process instability. Digestates from semi-continuous trials with mr-OFMSW had high concentrations of potentially toxic elements (PTE) and a lower nutrient content than ss-FW digestate, making the former unsuitable for application to land used in food production

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Anaerobic_digestion_of_two_biodegradable_municipal_waste_streams___Zhang_et_al,_scholar_text.pdf - Accepted Manuscript
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More information

e-pub ahead of print date: 12 April 2012
Published date: 15 August 2012
Keywords: municipal solid waste, food waste, methane potential, calorific value, nutrients, toxic elements
Organisations: Centre for Environmental Science

Identifiers

Local EPrints ID: 338988
URI: http://eprints.soton.ac.uk/id/eprint/338988
ISSN: 0301-4797
PURE UUID: 28ca3ea7-757e-468e-83ef-21092f3c9179
ORCID for Yue Zhang: ORCID iD orcid.org/0000-0002-5068-2260
ORCID for Sonia Heaven: ORCID iD orcid.org/0000-0001-7798-4683

Catalogue record

Date deposited: 21 May 2012 12:51
Last modified: 17 Mar 2020 01:25

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