Ethanol production with starch-based Tetraselmis subcordiformis grown with CO2 produced during ethanol fermentation.
- Author:
Sha LIAO
1
;
Changhong YAO
;
Song XUE
;
Wei ZHANG
;
Fengwu BAI
Author Information
1. School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, China.
- Publication Type:Journal Article
- MeSH:
Batch Cell Culture Techniques;
Carbon Dioxide;
metabolism;
pharmacology;
Cells, Cultured;
Ethanol;
metabolism;
Fermentation;
Microalgae;
drug effects;
growth & development;
metabolism;
Photobioreactors;
Saccharomyces cerevisiae;
metabolism;
Starch;
metabolism
- From:
Chinese Journal of Biotechnology
2011;27(9):1292-1298
- CountryChina
- Language:Chinese
-
Abstract:
A system coupling ethanol fermentation with microalgae culture was developed, in which CO2 produced during ethanol fermentation was used as carbon source for the growth of Tetraselmis subcordiformis, a microalgae accumulating starch intracellularly. The biomass concentration about 2.0 g DCW/L was achieved within the photobioreactor for the batch culture of 7 days, and intracellular starch accumulation was about 45%. Furthermore, ultrasonic pretreatment and enzymatic hydrolysis were applied to the microalgae biomass, and 71.1% of the intracellular starch was converted into glucose that was fermented sequentially to ethanol by Saccharomyces cerevisiae with an ethanol yield of 87.6% of the theoretical value, indicating that the microalgae biomass could be an alternative feedstock for ethanol production to save grain consumption, and in the meantime mitigate the CO2 emission.
