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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Vydané v:	Bioresource technology Ročník 139; s. 149 - 154
Hlavní autori:	Anjos, Mariana, Fernandes, Bruno D., Vicente, António A., Teixeira, José A., Dragone, Giuliano
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Kidlington Elsevier Ltd 01.07.2013 Elsevier
Predmet:	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
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Shrnutí:	•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.
Bibliografia:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0960-8524 1873-2976 1873-2976
DOI:	10.1016/j.biortech.2013.04.032