期刊
BIORESOURCE TECHNOLOGY
卷 138, 期 -, 页码 48-54出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.03.135
关键词
Microalga; Yeast; Lipid; Biodiesel; Carbon dioxide fixation
资金
- Portuguese Foundation for Science and Technology through the SIMBIOALGA project [PTDC/AAC-AMB/112954/2009, FCOMP-01-0124-FEDER-013935]
- FEDER funding through COMPETE - Programa Operacional Factores de Competitividade
- Fundacao para a Ciencia e a Tecnologia, Portugal [SFRH/BD/38516/2007]
- Fundação para a Ciência e a Tecnologia [PTDC/AAC-AMB/112954/2009, SFRH/BD/38516/2007] Funding Source: FCT
In order to produce single-cell oil for biodiesel, a yeast and a microalga were, for the first time, grown in two separate reactors connected by their gas-phases, taking advantage of their complementary nutritional metabolisms, i.e., respiration and photosynthesis. The yeast Rhodosporidium toruloides was used for lipid production, originating a carbon dioxide-enriched outlet gas stream which in turn was used to stimulate the autotrophic growth of Chlorella protothecoides in a vertical-alveolar-panel (VAP) photobioreactor. The microalgal biomass productivity was 0.015 g L-1 h(-1), and its lipid productivity attained 2.2 mg L-1- h(-1) when aerated with the outlet gas stream from the yeast fermenter. These values represent an increase of 94% and 87%, respectively, as compared to a control culture aerated with air. The CO2 bio-fixed by the microalgal biomass reached an estimated value of 29 mg L-1 h(-1) in the VAP receiving the gas stream from the fermenter, a value 1.9 times higher than that measured in the control VAP. (C) 2013 Elsevier Ltd. All rights reserved.
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