Photobioreactor strategies for improving the CO 2 fixation efficiency of indigenous Scenedesmus obliquus CNW-N: Statistical optimization of CO 2 feeding, illumination, and operation mode

Shih Hsin Ho; Wei Bin Lu; Jo Shu Chang

doi:10.1016/j.biortech.2011.11.091

Photobioreactor strategies for improving the CO ₂ fixation efficiency of indigenous Scenedesmus obliquus CNW-N: Statistical optimization of CO ₂ feeding, illumination, and operation mode

Shih Hsin Ho
, Wei Bin Lu
, Jo Shu Chang^*

^*Corresponding author for this work

National Cheng Kung University
Chung Hwa University of Medical Technology

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

Abstract

Statistical experimental design and bioreactor strategies were applied to enhance CO ₂ fixation ability of microalga Scenedesmus obliquus CNW-N. Four operating parameters strongly influencing microalgal CO ₂ fixation efficiency (namely, CO ₂ concentration, CO ₂ flow rate, magnesium concentration, and light intensity) were optimized with response surface methodology. The optimal range of parameters achieving the best overall performance of specific growth rate and CO ₂ fixation rate was determined with overlay counter plot techniques. Optimal ranges of CO ₂ concentration, CO ₂ flow rate, magnesium concentration and light intensity were 2.0-2.5%, 0.3-0.5vvm, 1.7-2.7mM and 180-250μmolm ^-2s ^-1, respectively, achieving a specific growth rate of >1.22d ^-1 and CO ₂ fixation rate of >800mgL ^-1d ^-1. Semi-batch operations further enhanced the biomass productivity, photosynthesis efficiency, and CO ₂ fixation rate to 1030mgL ^-1d ^-1, 10.5%, and 1782mgL ^-1d ^-1, respectively. This performance is better than the results reported by most related studies.

Original language	English
Pages (from-to)	106-113
Number of pages	8
Journal	Bioresource Technology
Volume	105
DOIs	https://doi.org/10.1016/j.biortech.2011.11.091
State	Published - Feb 2012
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

CO fixation
Microalgae
Response surface methodology
Scenedesmus obliquus
Semi-batch culture

Access to Document

10.1016/j.biortech.2011.11.091

Cite this

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title = "Photobioreactor strategies for improving the CO 2 fixation efficiency of indigenous Scenedesmus obliquus CNW-N: Statistical optimization of CO 2 feeding, illumination, and operation mode",

abstract = "Statistical experimental design and bioreactor strategies were applied to enhance CO 2 fixation ability of microalga Scenedesmus obliquus CNW-N. Four operating parameters strongly influencing microalgal CO 2 fixation efficiency (namely, CO 2 concentration, CO 2 flow rate, magnesium concentration, and light intensity) were optimized with response surface methodology. The optimal range of parameters achieving the best overall performance of specific growth rate and CO 2 fixation rate was determined with overlay counter plot techniques. Optimal ranges of CO 2 concentration, CO 2 flow rate, magnesium concentration and light intensity were 2.0-2.5\%, 0.3-0.5vvm, 1.7-2.7mM and 180-250μmolm -2s -1, respectively, achieving a specific growth rate of >1.22d -1 and CO 2 fixation rate of >800mgL -1d -1. Semi-batch operations further enhanced the biomass productivity, photosynthesis efficiency, and CO 2 fixation rate to 1030mgL -1d -1, 10.5\%, and 1782mgL -1d -1, respectively. This performance is better than the results reported by most related studies.",

keywords = "CO fixation, Microalgae, Response surface methodology, Scenedesmus obliquus, Semi-batch culture",

author = "Ho, \{Shih Hsin\} and Lu, \{Wei Bin\} and Chang, \{Jo Shu\}",

year = "2012",

month = feb,

doi = "10.1016/j.biortech.2011.11.091",

language = "英语",

volume = "105",

pages = "106--113",

journal = "Bioresource Technology",

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T2 - Statistical optimization of CO 2 feeding, illumination, and operation mode

AU - Ho, Shih Hsin

AU - Lu, Wei Bin

AU - Chang, Jo Shu

PY - 2012/2

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N2 - Statistical experimental design and bioreactor strategies were applied to enhance CO 2 fixation ability of microalga Scenedesmus obliquus CNW-N. Four operating parameters strongly influencing microalgal CO 2 fixation efficiency (namely, CO 2 concentration, CO 2 flow rate, magnesium concentration, and light intensity) were optimized with response surface methodology. The optimal range of parameters achieving the best overall performance of specific growth rate and CO 2 fixation rate was determined with overlay counter plot techniques. Optimal ranges of CO 2 concentration, CO 2 flow rate, magnesium concentration and light intensity were 2.0-2.5%, 0.3-0.5vvm, 1.7-2.7mM and 180-250μmolm -2s -1, respectively, achieving a specific growth rate of >1.22d -1 and CO 2 fixation rate of >800mgL -1d -1. Semi-batch operations further enhanced the biomass productivity, photosynthesis efficiency, and CO 2 fixation rate to 1030mgL -1d -1, 10.5%, and 1782mgL -1d -1, respectively. This performance is better than the results reported by most related studies.

AB - Statistical experimental design and bioreactor strategies were applied to enhance CO 2 fixation ability of microalga Scenedesmus obliquus CNW-N. Four operating parameters strongly influencing microalgal CO 2 fixation efficiency (namely, CO 2 concentration, CO 2 flow rate, magnesium concentration, and light intensity) were optimized with response surface methodology. The optimal range of parameters achieving the best overall performance of specific growth rate and CO 2 fixation rate was determined with overlay counter plot techniques. Optimal ranges of CO 2 concentration, CO 2 flow rate, magnesium concentration and light intensity were 2.0-2.5%, 0.3-0.5vvm, 1.7-2.7mM and 180-250μmolm -2s -1, respectively, achieving a specific growth rate of >1.22d -1 and CO 2 fixation rate of >800mgL -1d -1. Semi-batch operations further enhanced the biomass productivity, photosynthesis efficiency, and CO 2 fixation rate to 1030mgL -1d -1, 10.5%, and 1782mgL -1d -1, respectively. This performance is better than the results reported by most related studies.

KW - CO fixation

KW - Microalgae

KW - Response surface methodology

KW - Scenedesmus obliquus

KW - Semi-batch culture

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