Evaluation of carbon dioxide mass transfer in raceway reactors for microalgae culture using flue gases
Evaluation of carbon dioxide mass transfer in raceway reactors for microalgae culture using flue gases
Mass transfer of CO2 from flue gas was quantified in a 100 m2 raceway. The carbonation sump was operated with and without a baffle at different liquid/gas ratios, with the latter having the greatest influence on CO2 recovery from the flue gas. A rate of mass transfer sufficient to meet the demands of an actively growing algal culture was best achieved by maintaining pH at ?8. Full optimisation of the process required both pH control and selection of the best liquid/gas flow ratio. A carbon transfer rate of 10 gC·min-1 supporting an algal productivity of 17 g·m-2·day-1 was achieved with only 4% direct loss of CO2 in the sump. 66% of the carbon was incorporated into biomass, while 6% was lost by outgassing and the remainder as dissolved carbon in the liquid phase. Use of a sump baffle required additional power without significantly improving carbon mass transfer.
carbonation, CO2 removal, mass transfer, microalgae culture, raceway reactors
307-314
de Godos, I.
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Mendoza, J.L.
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Acién, F.G.
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Molina, E.
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Banks, C.J.
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Heaven, S.
f25f74b6-97bd-4a18-b33b-a63084718571
Rogalla, F.
4758b3ba-eefc-4f3a-9760-8d5c429a7dfb
February 2014
de Godos, I.
760228a4-5f27-4268-9f5d-911a0e60fa7b
Mendoza, J.L.
947e2985-9cba-4bdf-aea7-fd53227a1a28
Acién, F.G.
fcf0682c-a771-4d80-8429-e44a55447afd
Molina, E.
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Banks, C.J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
Heaven, S.
f25f74b6-97bd-4a18-b33b-a63084718571
Rogalla, F.
4758b3ba-eefc-4f3a-9760-8d5c429a7dfb
de Godos, I., Mendoza, J.L., Acién, F.G., Molina, E., Banks, C.J., Heaven, S. and Rogalla, F.
(2014)
Evaluation of carbon dioxide mass transfer in raceway reactors for microalgae culture using flue gases.
Bioresource Technology, 153, .
(doi:10.1016/j.biortech.2013.11.087).
Abstract
Mass transfer of CO2 from flue gas was quantified in a 100 m2 raceway. The carbonation sump was operated with and without a baffle at different liquid/gas ratios, with the latter having the greatest influence on CO2 recovery from the flue gas. A rate of mass transfer sufficient to meet the demands of an actively growing algal culture was best achieved by maintaining pH at ?8. Full optimisation of the process required both pH control and selection of the best liquid/gas flow ratio. A carbon transfer rate of 10 gC·min-1 supporting an algal productivity of 17 g·m-2·day-1 was achieved with only 4% direct loss of CO2 in the sump. 66% of the carbon was incorporated into biomass, while 6% was lost by outgassing and the remainder as dissolved carbon in the liquid phase. Use of a sump baffle required additional power without significantly improving carbon mass transfer.
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e-pub ahead of print date: 8 December 2013
Published date: February 2014
Keywords:
carbonation, CO2 removal, mass transfer, microalgae culture, raceway reactors
Organisations:
Water & Environmental Engineering Group
Identifiers
Local EPrints ID: 360585
URI: http://eprints.soton.ac.uk/id/eprint/360585
ISSN: 0960-8524
PURE UUID: 558f7262-118b-41ce-abe2-f65dee22888e
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Date deposited: 19 Dec 2013 13:28
Last modified: 15 Mar 2024 02:52
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Contributors
Author:
I. de Godos
Author:
J.L. Mendoza
Author:
F.G. Acién
Author:
E. Molina
Author:
F. Rogalla
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