Optimization of CO2 bio-mitigation by Chlorella vulgaris

•CO2 fixation rate by Chlorella vulgaris was optimized.•Growth parameters were affected by CO2 concentration and aeration rate.•Biochemical composition of algae did not change under different growth conditions. Biofixation of CO2 by microalgae has been recognized as an attractive approach to CO2 mit...

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Published in:Bioresource technology Vol. 139; pp. 149 - 154
Main Authors: Anjos, Mariana, Fernandes, Bruno D., Vicente, António A., Teixeira, José A., Dragone, Giuliano
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 01.07.2013
Elsevier
Subjects:
Aeration
Aeration rate
Aerobiosis
Aerobiosis - drug effects
Biochemistry
Biodegradation, Environmental
Biodegradation, Environmental - drug effects
Biological and medical sciences
Biological mitigation
Biomass
bioreactors
bubbles
Carbon Cycle
Carbon Cycle - drug effects
Carbon Dioxide
Carbon Dioxide - metabolism
Carbon Dioxide - pharmacology
Carbon dioxide sequestration
chemical composition
Chlorella vulgaris
Chlorella vulgaris - drug effects
Chlorella vulgaris - growth & development
Chlorella vulgaris - metabolism
Cultivation
drug effects
Fundamental and applied biological sciences. Psychology
growth & development
Lipid Metabolism
Lipid Metabolism - drug effects
metabolism
Microalgae
microbiology
Optimization
pharmacology
Photobioreactors
Photobioreactors - microbiology
Proteins
Proteins - metabolism
risk reduction
Starch
Starch - metabolism
Strategy
Carbon dioxide sequestration
Microalgae
Aeration rate
Biological mitigation
Photobioreactors
Algae
Chlorella vulgaris
Carbon dioxide
CO2 sequestration
Biology
Chlorophyceae
Optimization
Aeration
Chlorophyta
Photobioreactor
Mitigation measure
Alga
Microorganism
ISSN:0960-8524, 1873-2976, 1873-2976
Online Access:Get full text
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Summary:•CO2 fixation rate by Chlorella vulgaris was optimized.•Growth parameters were affected by CO2 concentration and aeration rate.•Biochemical composition of algae did not change under different growth conditions. Biofixation of CO2 by microalgae has been recognized as an attractive approach to CO2 mitigation. The main objective of this work was to maximize the rate of CO2 fixation (RCO2) by the green microalga Chlorella vulgaris P12 cultivated photoautotrophically in bubble column photobioreactors under different CO2 concentrations (ranging from 2% to 10%) and aeration rates (ranging from 0.1 to 0.7vvm). Results showed that the maximum RCO2 (2.22gL−1d−1) was obtained by using 6.5% CO2 and 0.5vvm after 7days of cultivation at 30°C. Although final biomass concentration and maximum biomass productivity of microalgae were affected by the different cultivation conditions, no significant differences were obtained in the biochemical composition of microalgal cells for the evaluated levels of aeration and CO2. The present study demonstrated that optimization of microalgal cultivation conditions can be considered a useful strategy for maximizing CO2 bio-mitigation by C. vulgaris.
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ISSN:0960-8524
1873-2976
1873-2976
DOI:10.1016/j.biortech.2013.04.032