Modeling the light distribution in airlift photobioreactors under simultaneous external and internal illumination using the two-flux model

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	Modeling the light distribution in airlift photobioreactors under simultaneous external and internal illumination using the two-flux model
	Li, Xuemei 1,2; Yang, Ning 1
刊名	CHEMICAL ENGINEERING SCIENCE
	2013-01-25
卷号	88 期号:0 页码:16-22
关键词	Radiation Bioreactors Two-flux model Microalgae Absorption Energy
英文摘要	A 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.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	FINITE-VOLUME METHOD ; LOOP AIRLIFT ; CHLAMYDOMONAS-REINHARDTII ; PHOTOCATALYTIC REACTOR ; TORUS PHOTOBIOREACTOR ; RADIATION ABSORPTION ; SWIRLING FLOW ; BUBBLE-COLUMN ; GROWTH ; CULTIVATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000314690500003
公开日期	2015-05-27
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/13630]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.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
推荐引用方式 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.