Anaerobic digestion of maize in coupled leach-bed and anaerobic filter reactors
Anaerobic digestion of maize in coupled leach-bed and anaerobic filter reactors
The methane potential of a leach bed reactor (LBR) coupled to an anaerobic filter (AF) was assessed using energy maize (Zea mays) as substrate.
Four LBRs were used operated as pairs, with and without leachate recirculation, over two feed cycles with retention times of 14 and 28 days.
Performance was estimated from the total solids destruction in the LBR, and the volatile fatty acid (VFA) and soluble chemical oxygen demand (SCOD) in the leachate. Overall conversion of fresh substrate added to the combined system was good although the organic loading rate (OLR) was limited.
The coupled LBR demonstrated improved hydrolysis performance promoted by good buffering, and the AF showed rapid conversion of leachate SCOD into methane with possible further hydrolysis and acidification. Theoretical estimation of the methane potential showed that between 20–40% of the methane was formed in the LBR and was not captured in this trial.
anaerobic digestion, hydrolysis rate, leachate recirculation, maize methane potentia
1505-1511
Cysneiros, D.
5a57b764-9932-4365-8953-d9be50afd5fa
Banks, C. J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
Heaven, S.
f25f74b6-97bd-4a18-b33b-a63084718571
2008
Cysneiros, D.
5a57b764-9932-4365-8953-d9be50afd5fa
Banks, C. J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
Heaven, S.
f25f74b6-97bd-4a18-b33b-a63084718571
Cysneiros, D., Banks, C. J. and Heaven, S.
(2008)
Anaerobic digestion of maize in coupled leach-bed and anaerobic filter reactors.
Water Science & Technology, 58 (7), .
(doi:10.2166/wst.2008.518).
Abstract
The methane potential of a leach bed reactor (LBR) coupled to an anaerobic filter (AF) was assessed using energy maize (Zea mays) as substrate.
Four LBRs were used operated as pairs, with and without leachate recirculation, over two feed cycles with retention times of 14 and 28 days.
Performance was estimated from the total solids destruction in the LBR, and the volatile fatty acid (VFA) and soluble chemical oxygen demand (SCOD) in the leachate. Overall conversion of fresh substrate added to the combined system was good although the organic loading rate (OLR) was limited.
The coupled LBR demonstrated improved hydrolysis performance promoted by good buffering, and the AF showed rapid conversion of leachate SCOD into methane with possible further hydrolysis and acidification. Theoretical estimation of the methane potential showed that between 20–40% of the methane was formed in the LBR and was not captured in this trial.
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Published date: 2008
Keywords:
anaerobic digestion, hydrolysis rate, leachate recirculation, maize methane potentia
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Local EPrints ID: 75268
URI: http://eprints.soton.ac.uk/id/eprint/75268
ISSN: 0273-1223
PURE UUID: 5bba4a70-4992-4d92-8970-1ffd877ba924
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Date deposited: 12 Mar 2010
Last modified: 14 Mar 2024 02:39
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Author:
D. Cysneiros
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