Supplementary Files
Keywords
Photobioreactor
Microalgae biomass
Computational fluid dynamics (CFD)
How to Cite
Abstract
Industrially, the centrifugal pumps arevery useful and within their applications,it can be found pumping fluidscontaining living microorganismsin suspension. However, this typeof pumping can affect the growth ofmicroorganisms because it generateshigh shear stresses, which arenot supported by their cell walls,resulting in high cell mortality. In thisarticle, we analyzed computationallya centrifugal pump used for pumpingmicroalgal cultures in tubular photobioreactors.To do this, we modeledin CAD both the impeller and thevolute; and then we conducted a simulationin CFX under the operationconditions of a photobioreactor. Theevaluation of the velocity distributionand shear stresses inside the pump,led to conclude that it is impracticalto use these pumping mechanisms,due to the high mortality rate that isexpected for some microalgae species,such as the Chaetoceros muelleri; forwhich its viability can be reduced tolevels of 52%”.
CAMACHO, F.; ACIÉN, F.G.; SÁNCHEZ, J.A.; GARCÍA, F. and MOLINA, E. Prediction of dissolved oxygen and carbon dioxide concentration profiles in tubular photobioreactors for microalgal culture. Biotechnology and Bioengineering. 1999, vol. 62, num. 1, pp. 71-86.
CONTRERAS, A.; GARCÍA, F.; MOLINA, E. and MERCHUK, J.C. Interaction between CO2-mass transfer, light availability, and hydrodynamic stress in the growth of Phaeodactylum tricornutum in a concentric tube airlift photobioreactor. Biotechnology and Bioengineering. 1998, vol. 60, num. 3, pp. 317-325.
DEMIRBAS, A. Importance of Biodiesel as Transportation Fuel. Energy Policy. 2007, vol. 35, num. 9, pp. 4661- 4670.
GARCÍA, F.; GALLARDO, J.J.; SÁNCHEZ, A.; CERÓN, M.C.; BELARBI, E.H. and MOLINA, E. Determination of shear stress thresholds in toxic dinoflagellates cultured in shaken flasks Implica¬tions in bioprocess engineering. Process Biochemistry. 2007, vol. 42, pp. 1506-1515.
GUDIN, C. and CHAUMONT, D. Cell fragility - the key problem of microalgae mass production in closed photobioreactors. Bioresource Technology. 1991, vol. 38, num. 7-8, pp. 145-151.
MATAIX, C. Mecánica de fluidos y máquinas hidráulicas. 1986. ISBN 84-219-0175-03.
MAZZUCA, T.; GARCÍA, F.; MOLINA, E. and CHISTI, Y. Effects of agitation on the microalgae Phaeodactylum tricornutum and Porphyridium cruentum. Bioprocess and Biosystems Engineering. 2006, vol. 28, num. 4, pp. 243-250.
MICHELS, M.; VAN DER GOOT, A.; NORSKER, N.H. and WIJFFELS, R.H. Effects of shear stress on the microalgae Chaetoceros muelleri. Bioprocess and Biosystems Engineering. 2010, vol. 33, num. 8, pp. 921–927.
MITSUHASHI, S.; HOSAKA, K.; TOMONAGA, E.; MURAMATSU, H. and TANISHITA, K. Effects of shear flow on photosynthe¬sis in a dilute suspension of microalgae. Applied Microbiology and Biotechnology. 1995, vol. 42, num. 5, pp. 744-749.
MOLINA, E.; ACIÉN, F. G., GARCÍA, F. and CHISTI, Y. Photobioreactors: Light regime, mass transfer, and scale up. Journal of Biotechnology. 1999, vol. 70, num. 1-3, pp. 231-247.
MOTT, R.L. Applied fluid mechanics. 6th Edition, Prentice Hall. USA. 2005, pp. 597.
PRUVOST, J.; CORNET, J.F. and LEGRAND, J. Hydrodynamics influence on light conversion in photobioreactors: An energetically consistent analysis. Chemical Engineering Science. 2008, vol. 63, num. 14, 3679-3694.
RAMÍREZ, J.L.G. and RAMOS, M.A. Hydrodynamic computational evaluation in solar tubular photobioreactors bends with different cross sections. CtandF - Ciencia, Tecnología y Futuro. 2011, vol. 4, fasc. 4, pp. 59-72.
RICHMOND, A.; BOUSSIBA, S.; VONSHAK, A. and KOPEL, R. A new tubular reactor for mass production of microalgae outdoors. Journal of Applied Phycology.1993, vol. 5, num. 3, pp. 327-332.
ROSELLO, R.; CSÖGÖR, Z.; PERNER-NOCHTA, I.; FLECK-SCHNEIDER, P. and POSTEN, C. Scale-down of microalgae cultivations in tubular photo-bioreactors—A conceptual approach. Journal of Biotechnology. 2007, vol. 132, num. 2, pp. 127-133.
SÁNCHEZ, A.; GARCÍA, F.; CONTRERAS, A.; MOLINA, E. and CHISTI, Y. Bubble column and airlift photobioreactors for algal culture. Aiche Journal. 2000, vol. 46, num. 9, pp. 1872-1877
Vaxa Software, Viscosidad dinámica del agua líquida a varias temperaturas [web en línea] <http://www.vaxasoftware.com/doc_edu/qui/viscoh2o.pdf> [consultada: 15-2-2011]
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.
Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.