Optimization of carbon dioxide supply in raceway reactors: influence of carbon dioxide molar fraction and gas flow rate
Optimization of carbon dioxide supply in raceway reactors: influence of carbon dioxide molar fraction and gas flow rate
Influence of CO2 composition and gas flow rate to control pH in a pilot-scale raceway producing Scenedesmus sp. was studied. Light and temperature determined the biomass productivity whereas neither the CO2 molar fraction nor the gas flow rate used influenced it; because pH was always controlled and carbon limitation did not take place. The CO2 molar fraction and the gas flow rate influenced carbon loss in the system. At low CO2 molar fraction (2-6%) or gas flow rate (75-100 l·min-1) the carbon efficiency in the sump was higher than 95%, 85% of the injected carbon being transformed into biomass. Conversely, at high CO2 molar fraction (14%) or gas flow rate (150 l·min-1) the carbon efficiency in the sump was lower than 67%, 32% of the carbon being fixed as biomass. Analysis here reported allows the pH control to be optimized and production costs to be reduced by optimizing CO2 efficiency.
72-81
Duarte-Santos, T.
2fc8e1da-c3b7-4f7a-b2b3-5f77c5e59197
Mendoza Martin, Jose
0873e7e0-3194-4c73-8991-2821f9abe114
Acién Fernández, F.G.
4a8575de-884e-4ae3-869b-4a13e352d1bb
Molina, E.
fb66da60-cd71-4920-8850-371efa4b40cb
Vieira-Costa, J.A.
86bfb84e-34af-401e-afbf-296e342be797
Heaven, Sonia
f25f74b6-97bd-4a18-b33b-a63084718571
7 April 2016
Duarte-Santos, T.
2fc8e1da-c3b7-4f7a-b2b3-5f77c5e59197
Mendoza Martin, Jose
0873e7e0-3194-4c73-8991-2821f9abe114
Acién Fernández, F.G.
4a8575de-884e-4ae3-869b-4a13e352d1bb
Molina, E.
fb66da60-cd71-4920-8850-371efa4b40cb
Vieira-Costa, J.A.
86bfb84e-34af-401e-afbf-296e342be797
Heaven, Sonia
f25f74b6-97bd-4a18-b33b-a63084718571
Duarte-Santos, T., Mendoza Martin, Jose, Acién Fernández, F.G., Molina, E., Vieira-Costa, J.A. and Heaven, Sonia
(2016)
Optimization of carbon dioxide supply in raceway reactors: influence of carbon dioxide molar fraction and gas flow rate.
Bioresource Technology, 212, .
(doi:10.1016/j.biortech.2016.04.023).
Abstract
Influence of CO2 composition and gas flow rate to control pH in a pilot-scale raceway producing Scenedesmus sp. was studied. Light and temperature determined the biomass productivity whereas neither the CO2 molar fraction nor the gas flow rate used influenced it; because pH was always controlled and carbon limitation did not take place. The CO2 molar fraction and the gas flow rate influenced carbon loss in the system. At low CO2 molar fraction (2-6%) or gas flow rate (75-100 l·min-1) the carbon efficiency in the sump was higher than 95%, 85% of the injected carbon being transformed into biomass. Conversely, at high CO2 molar fraction (14%) or gas flow rate (150 l·min-1) the carbon efficiency in the sump was lower than 67%, 32% of the carbon being fixed as biomass. Analysis here reported allows the pH control to be optimized and production costs to be reduced by optimizing CO2 efficiency.
Text
__userfiles.soton.ac.uk_Users_nl2_mydesktop_Deposits_One off_Duarte-Santos et al 2016 - scholar text.pdf
- Accepted Manuscript
More information
Accepted/In Press date: 5 April 2016
Published date: 7 April 2016
Organisations:
Faculty of Engineering and the Environment
Identifiers
Local EPrints ID: 397473
URI: http://eprints.soton.ac.uk/id/eprint/397473
ISSN: 0960-8524
PURE UUID: f35c6f2a-ae2a-4e42-8c6e-d5b9f54d0ea1
Catalogue record
Date deposited: 28 Jun 2016 11:05
Last modified: 15 Mar 2024 05:42
Export record
Altmetrics
Contributors
Author:
T. Duarte-Santos
Author:
Jose Mendoza Martin
Author:
F.G. Acién Fernández
Author:
E. Molina
Author:
J.A. Vieira-Costa
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics