Ammonia removal in food waste anaerobic digestion using a side-stream stripping process
Ammonia removal in food waste anaerobic digestion using a side-stream stripping process
Three 35-L anaerobic digesters fed on source segregated food waste were coupled to side-stream ammonia stripping columns and operated semi-continuously over 300 days, with results in terms of performance and stability compared to those of a control digester without stripping. Biogas was used as the stripping medium, and the columns were operated under different conditions of temperature (55, 70, 85 °C), pH (unadjusted and pH 10), and RT (2 to 5 days). To reduce digester TAN concentrations to a useful level a high temperature (?70°C) and a pH of 10 were needed; under these conditions 48% of the TAN was removed over a 138-day period without any detrimental effects on digester performance. Other effects of the stripping process were an overall reduction in digestate organic nitrogen-containing fraction compared to the control and a recovery in the acetoclastic pathway when TAN concentration was 1770 ± 20 mg kg-1.
Serna-Maza, Alba
81ce5c84-2b04-49b3-86fd-3a5a6834efc2
Heaven, Sonia
f25f74b6-97bd-4a18-b33b-a63084718571
Banks, Charles J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
5 November 2013
Serna-Maza, Alba
81ce5c84-2b04-49b3-86fd-3a5a6834efc2
Heaven, Sonia
f25f74b6-97bd-4a18-b33b-a63084718571
Banks, Charles J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
Serna-Maza, Alba, Heaven, Sonia and Banks, Charles J.
(2013)
Ammonia removal in food waste anaerobic digestion using a side-stream stripping process.
Bioresource Technology.
(doi:10.1016/j.biortech.2013.10.093).
Abstract
Three 35-L anaerobic digesters fed on source segregated food waste were coupled to side-stream ammonia stripping columns and operated semi-continuously over 300 days, with results in terms of performance and stability compared to those of a control digester without stripping. Biogas was used as the stripping medium, and the columns were operated under different conditions of temperature (55, 70, 85 °C), pH (unadjusted and pH 10), and RT (2 to 5 days). To reduce digester TAN concentrations to a useful level a high temperature (?70°C) and a pH of 10 were needed; under these conditions 48% of the TAN was removed over a 138-day period without any detrimental effects on digester performance. Other effects of the stripping process were an overall reduction in digestate organic nitrogen-containing fraction compared to the control and a recovery in the acetoclastic pathway when TAN concentration was 1770 ± 20 mg kg-1.
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Serna et al ammonia stripping 2013 - scholar text.pdf
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Published date: 5 November 2013
Organisations:
Water & Environmental Engineering Group
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Local EPrints ID: 359728
URI: http://eprints.soton.ac.uk/id/eprint/359728
ISSN: 0960-8524
PURE UUID: 5ed7ffb9-90d9-4218-89c1-8209aee30916
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Date deposited: 22 Nov 2013 14:33
Last modified: 15 Mar 2024 02:52
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Author:
Alba Serna-Maza
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