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Modeling the light distribution in airlift photobioreactors under simultaneous external and internal illumination using the two-flux model
Li, Xuemei1,2; Yang, Ning1
2013-01-25
Source PublicationCHEMICAL ENGINEERING SCIENCE
Volume88Issue:0Pages:16-22
AbstractA simultaneous external and internal illumination method is proposed for cylindrical airlift photobioreactors in this paper, in which multiple light sources are placed around the downcomer region, to achieve a more homogeneous light distribution. Internal light sources are mounted near the wall of the draft tube and external light sources near the wall of the photobioreactor. The light distribution in an airlift photobioreactor under simultaneous external and internal illumination (APER-SEII) with various biomass concentrations and radii is investigated using the two-flux model. This model is able to obtain reasonable prediction compared with the simulation of more rigorous DO models, and is suitable for real-time control of microalgae cultivation in photobioreactors. Light attenuation profiles are compared with those of only externally illuminated airlift photobioreactors (APER-EI), showing that the new illumination method can increase the size of the illuminated zone in photobioreactors and enable a more uniform light distribution in the downcomer region. The calculation results also show that the annular distance of the downcomer region (Delta R) is more critical than the radius of the photobioreactor (R) to light distribution and therefore the design of photobioreactors. Asymmetry of light distribution in an airlift photobioreactor with the same radiation flux on the two walls is pronounced for low biomass concentrations and small radii. (C) 2012 Elsevier Ltd. All rights reserved.
KeywordRadiation Bioreactors Two-flux Model Microalgae Absorption Energy
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
Language英语
WOS KeywordFINITE-VOLUME METHOD ; LOOP AIRLIFT ; CHLAMYDOMONAS-REINHARDTII ; PHOTOCATALYTIC REACTOR ; TORUS PHOTOBIOREACTOR ; RADIATION ABSORPTION ; SWIRLING FLOW ; BUBBLE-COLUMN ; GROWTH ; CULTIVATION
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000314690500003
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13630
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Guangxi Univ Nationalities, Sch Sci, Nanning 530006, Peoples R China
Recommended Citation
GB/T 7714
Li, Xuemei,Yang, Ning. Modeling the light distribution in airlift photobioreactors under simultaneous external and internal illumination using the two-flux model[J]. CHEMICAL ENGINEERING SCIENCE,2013,88(0):16-22.
APA Li, Xuemei,&Yang, Ning.(2013).Modeling the light distribution in airlift photobioreactors under simultaneous external and internal illumination using the two-flux model.CHEMICAL ENGINEERING SCIENCE,88(0),16-22.
MLA Li, Xuemei,et al."Modeling the light distribution in airlift photobioreactors under simultaneous external and internal illumination using the two-flux model".CHEMICAL ENGINEERING SCIENCE 88.0(2013):16-22.
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