The University of Southampton
University of Southampton Institutional Repository

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
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.
0960-8524
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
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, 72-81. (doi:10.1016/j.biortech.2016.04.023).

Record type: Article

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
Download (468kB)

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
ORCID for Sonia Heaven: ORCID iD orcid.org/0000-0001-7798-4683

Catalogue record

Date deposited: 28 Jun 2016 11:05
Last modified: 07 Oct 2020 05:47

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
Author: Sonia Heaven ORCID iD

University divisions

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

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×