Repository logo
 
Publication

Transfer of carbon dioxide within cultures of microalgae: plain bubbling versus hollow-fiber modules

2001Journal article Open access
Simple item page
dc.contributor.authorCarvalho, Ana P.
dc.contributor.authorMalcata, F. Xavier
dc.date.accessioned2011-10-23T09:40:09Z
dc.date.available2011-10-23T09:40:09Z
dc.date.issued2001
dc.description.abstractIn attempts to improve the metabolic efficiency in closed photosynthetic reactors, availability of light and CO2 are often considered as limiting factors, as they are difficult to control in a culture. The carbon source is usually provided via bubbling of CO2- enriched air into the culture medium; however, this procedure is not particularly effective in terms of mass transfer. Besides, it leads to considerable waste of that gas to the open atmosphere, which adds to operation costs. Increase in the interfacial area of contact available for gas exchange via use of membranes might be a useful alternative; microporous membranes, in hollow-fiber form, were tested accordingly. Two hollow-fiber modules, different in both hydrophilicity and outer surface area, were tested and duly compared, in terms of mass transfer, versus traditional plain bubbling. Overall volumetric coefficients (KLa) for CO2 transfer were 1.48 10-2 min-1 for the hydrophobic membrane, 1.33 10-2 min-1 for the hydrophilic membrane, and 7.0 10-3 min-1 for plain bubbling. A model microalga, viz. Nannochloropsis sp., was cultivated using the two aforementioned membrane systems and plain bubbling. The produced data showed slight (but hardly significant) increases in biomass productivity when the hollow-fiber devices were used. However, hollow-fiber modules allow recirculation of unused CO2, thus reducing feedstock costs. Furthermore, such indirect way of supplying CO2 offers the additional possibility for use of lower gas pressures, as no need to counterbalance hydrostatic heads exists.por
dc.identifier.citationCARVALHO, Ana P. ; MALCATA, F. Xavier - Transfer of Carbon Dioxide within Cultures of Microalgae: Plain Bubbling versus Hollow-Fiber Modules. Biotechnology Progress. ISSN 1520-6033. Vol. 17, n.º 2 (2001), p. 265-272por
dc.identifier.doi10.1021/bp000157v
dc.identifier.urihttp://hdl.handle.net/10400.14/6924
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherAmerican Chemical Society and American Institute of Chemical Engineerspor
dc.titleTransfer of carbon dioxide within cultures of microalgae: plain bubbling versus hollow-fiber modulespor
dc.typejournal article
dspace.entity.typePublication
person.familyNameCarvalho
person.familyNameMalcata
person.givenNameAna
person.givenNameFrancisco
person.identifierK-5479-2013
person.identifier.ciencia-id6F1E-301F-71BA
person.identifier.ciencia-id1B13-38A5-35F5
person.identifier.orcid0000-0001-5967-4200
person.identifier.orcid0000-0003-3073-1659
person.identifier.ridK-5479-2013
person.identifier.scopus-author-id36855267200
person.identifier.scopus-author-id7102542478
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication61e93e5c-d206-455d-84cb-d5cbc048ee5b
relation.isAuthorOfPublicationa06c00da-0e2f-4434-8ede-4d7b22c0dfe9
relation.isAuthorOfPublication.latestForDiscovery61e93e5c-d206-455d-84cb-d5cbc048ee5b

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Transfer of Carbon Dioxide within Cultures of Microalgae Plain.pdf
Size:
180.92 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
3.44 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ESB - Contribuições em Revistas Científicas / Contribution to Journals