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Biohydrogen production from food waste in batch and semi-continuous conditions: evaluation of a two-phase approach with digestate recirculation for pH control

Biohydrogen production from food waste in batch and semi-continuous conditions: evaluation of a two-phase approach with digestate recirculation for pH control
Biohydrogen production from food waste in batch and semi-continuous conditions: evaluation of a two-phase approach with digestate recirculation for pH control
The research investigated the production of Biohythane in a two-phase anaerobic digestion process treating food waste as substrate. Preliminary batch assays were carried out at initial organic loadings of 15, 20, 25 and 30 kg TVS m?3, in stirred 1.5-l reactors at 55 °C. The results showed all hydrogen was produced within the first 24 h after feeding and the highest load tested gave the maximum hydrogen production (0.047 m3 H2 kg?1VS, H2 30%). Similar loadings were then tested in a two-phase system. Hydraulic retention times of 3 and 12 days were applied to the first and second reactor respectively. In order to keep the pH at ?5.5, either supernatant or whole digestate from the methanogenic reactor was recirculated to the first phase. Results showed that hydrogen was produced (0.117 Nm3 kg?1 VS, 47.7%) when recirculating whole digestate with an organic loading rate of 20 kg TVS m?3 day?1.
biohydrogen, biohythane, two-phase, pH control, anaerobic digestion
0360-3199
4531-4360
Chinellato, G.
10784afa-e13f-4ccd-b3c3-188fcf4b5d21
Cavinato, C.
8a8f0849-279c-4dca-a7a0-d78ba87ffaa2
Bolzonella, D
554b33d4-ce6f-4d05-93ac-fcc5d49187f3
Heaven, S.
f25f74b6-97bd-4a18-b33b-a63084718571
Banks, C.J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
Chinellato, G.
10784afa-e13f-4ccd-b3c3-188fcf4b5d21
Cavinato, C.
8a8f0849-279c-4dca-a7a0-d78ba87ffaa2
Bolzonella, D
554b33d4-ce6f-4d05-93ac-fcc5d49187f3
Heaven, S.
f25f74b6-97bd-4a18-b33b-a63084718571
Banks, C.J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f

Chinellato, G., Cavinato, C., Bolzonella, D, Heaven, S. and Banks, C.J. (2013) Biohydrogen production from food waste in batch and semi-continuous conditions: evaluation of a two-phase approach with digestate recirculation for pH control. International Journal of Hydrogen Energy, 38 (11), 4531-4360. (doi:10.1016/j.ijhydene.2013.01.078).

Record type: Article

Abstract

The research investigated the production of Biohythane in a two-phase anaerobic digestion process treating food waste as substrate. Preliminary batch assays were carried out at initial organic loadings of 15, 20, 25 and 30 kg TVS m?3, in stirred 1.5-l reactors at 55 °C. The results showed all hydrogen was produced within the first 24 h after feeding and the highest load tested gave the maximum hydrogen production (0.047 m3 H2 kg?1VS, H2 30%). Similar loadings were then tested in a two-phase system. Hydraulic retention times of 3 and 12 days were applied to the first and second reactor respectively. In order to keep the pH at ?5.5, either supernatant or whole digestate from the methanogenic reactor was recirculated to the first phase. Results showed that hydrogen was produced (0.117 Nm3 kg?1 VS, 47.7%) when recirculating whole digestate with an organic loading rate of 20 kg TVS m?3 day?1.

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More information

Published date: 15 April 2013
Keywords: biohydrogen, biohythane, two-phase, pH control, anaerobic digestion
Organisations: Water & Environmental Engineering Group

Identifiers

Local EPrints ID: 350282
URI: https://eprints.soton.ac.uk/id/eprint/350282
ISSN: 0360-3199
PURE UUID: 8331f0a2-c9fb-4c93-999a-190909fba744

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Date deposited: 20 Aug 2013 08:44
Last modified: 18 Jul 2017 04:36

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