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Updated: Jun 14, 2026
14:53
Techniques for the Evolution of Robust Pentose-fermenting Yeast for Bioconversion of Lignocellulose to Ethanol
Published on: October 24, 2016
[Enhancing ethanol production using thermophilic yeast by response surface methodology].
Naikun Shen1, Qingyan Wang, Yan Lu
1National Engineering Research Center for Non-food Biorefinery, Guangxi Academy ofSciences, Nanning 530007, China.
Summary
Optimized simultaneous saccharification and fermentation (SSF) of cassava flour using thermophilic yeast achieved high-concentration ethanol. Key parameters like liquefaction time and substrate concentration were refined, boosting ethanol yield by 33%.
Area of Science:
- Biotechnology
- Biochemical Engineering
Context:
- Cassava flour is a viable feedstock for bioethanol production.
- Thermophilic yeast offers advantages for high-temperature fermentation processes.
Purpose:
- To optimize simultaneous saccharification and fermentation (SSF) conditions for high-concentration ethanol production from cassava flour.
- To identify and refine critical process parameters using statistical experimental designs.
Summary:
- Single factor experiments and Plackett-Burman design identified key parameters: liquefaction time, glucosidase dosage, and initial cassava flour concentration.
- Steepest ascent and Box-Behnken designs determined optimal conditions: 35 min liquefaction, 1.21 AGU/g substrate glucosidase, and 37.62% initial substrate concentration.
- Under optimized conditions, a 20 L fermentor achieved 16.07% (V/W) ethanol yield after 48 hours at 37°C and 100 rpm.
Impact:
- Achieved a 33% increase in ethanol content compared to original conditions.
- Demonstrates a highly efficient method for bioethanol production from cassava.
- Provides optimized parameters for industrial-scale bioethanol fermentation.
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