期刊
JOURNAL OF BIOTECHNOLOGY
卷 184, 期 -, 页码 74-83出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jbiotec.2014.05.012
关键词
Chlorella protothecoides; Heterotrophic; Autotrophic; Biodiesel; Carbon dioxide fixation
资金
- Portuguese Foundation for Science and Technology (FCT) [SFRH/BD/38516/2007]
- FCT [SFRH/BPD/42004/2007]
- FCT through the SIMBIOALGA project [PTDC/AAC-AMB/112954/2009]
- FEDER through COMPETE - Programa Operacional Factores de Competitividade [FCOMP-01-0124-FEDER-013935]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/42004/2007, PTDC/AAC-AMB/112954/2009, SFRH/BD/38516/2007] Funding Source: FCT
Chlorella protothecoides, a lipid-producing microalga, was grown heterotrophically and autotrophically in separate reactors, the off-gases exiting the former being used to aerate the latter. Autotrophic biomass productivity with the two-reactor association, 0.0249 g L-1 h(-1), was 2.2-fold the value obtained in a control autotrophic culture, aerated with ambient air. Fatty acid productivity was 1.7-fold the control value. C. protothecoides heterotrophic biomass productivity was 0.229 g L-1 h(-1). This biomass' fatty acid content was 34.5% (w/w) with a profile suitable for biodiesel production, according to European Standards. The carbon dioxide fixed by the autotrophic biomass was 45 mg CO2 L-1 h(-1) in the symbiotic arrangement, 2.1 times the control reactor value. The avoided CO2 atmospheric emission represented 30% of the CO2 produced in the heterotrophic stage, while the released O-2 represented 49% of the oxygen demand in that stage. Thus, an increased efficiency in the glucose carbon source use and a higher environmental sustainability were achieved in microalgal biodiesel production using the proposed assembly. (C) 2014 Elsevier B.V. All rights reserved.
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