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Destressing Yeast for Higher Biofuel Yields: Can Excess Chaotropicity Be Mitigated?
David J Timson1, Joshua Eardley2
1School of Pharmacy and Biomolecular Sciences, University of Brighton, Huxley Building, Lewes Road, Brighton, BN2 4GJ, UK. d.timson@brighton.ac.uk.
Applied Biochemistry and Biotechnology
|August 18, 2020
Summary
High concentrations of biofuels like ethanol stress microbes, limiting production yields. High molecular mass polyethylene glycols show promise as cost-effective additives to mitigate this stress and enhance biofuel fermentation.
Area of Science:
- Biotechnology
- Biochemical Engineering
- Microbial Physiology
Background:
- Biofuels offer carbon reduction and energy security benefits.
- Microbial stress from chaotropic compounds like ethanol limits biofuel yields.
- Brewer's yeast (Saccharomyces cerevisiae) growth is inhibited above 17% ethanol.
Purpose of the Study:
- To investigate methods for mitigating microbial stress caused by chaotropic agents in biofuel production.
- To identify effective kosmotropic additives for enhancing biofuel yields.
- To present theoretical results on the efficacy and cost-effectiveness of potential additives.
Main Methods:
- Theoretical calculations were performed to assess the effects of various compounds.
- Investigated the potential of high molecular mass polyethylene glycols as kosmotropic additives.
- Analyzed assumptions and limitations of the theoretical models.
Main Results:
- High molecular mass polyethylene glycols are suggested as effective and economical kosmotropic additives.
- Theoretical results indicate potential for increased biofuel yields through stress mitigation.
- Calculations provide insights into the neutralization of chaotropicity in microbial systems.
Conclusions:
- Understanding chaotropic effects on microbes is crucial for improving bioethanol production.
- Polyethylene glycols may offer a viable strategy to enhance fermentation efficiency.
- Further research can lead to more rational approaches for optimizing biofuel yields.
