More Efficient Ethanol Production from Mixed Sugars Using Spathaspora Yeast
UW–Madison researchers have developed a method for producing ethanol using Spathaspora passalidarum yeast to ferment xylose or cellobiose, even when mixed with glucose.
The ethanol is converted from biomass or other lignocellulosic material from agricultural residues, fast-growing hardwoods and processing byproducts. Sugars, lignin and other components are first extracted from this feedstock using standard methods to form mixtures rich in different sugars. The mixture is contacted with a Spathaspora yeast cell under oxygen-limiting conditions suitable to allow the yeast to ferment a portion of the xylose and/or cellobiose into ethanol.Benefits
- Cofermentation of mixed sugars
- Better rate and yield compared to other yeasts
- Efficient use of plentiful, renewable resources
- Spathaspora have minimal growth requirements.
- Production plants and equipment could be easily adapted to the method.
Cleantech - Biofuels and Renewable Fuels
Research Tools - FermentationMore Information
Long T.M., Su Y.K., Headman J., Higbee A., Willis L.B. and Jeffries T.W. 2012. Cofermentation of Glucose, Xylose, and Cellobiose by the Beetle-Associated Yeast Spathaspora passalidarum. Appl. Environ. Microbiol. 78, 5492-5500.
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