Skip to main content
Improved Corn Ethanol Fermentation and Oil Distribution by Using Polysaccharide Hydrolyzing Enzymes
Journal of Bioprocess Engineering and Biorefinery
  • Linxing Yao, Iowa State University
  • Pawarisa Luangthongkam, Asian Institute of Technology
  • Tong Wang, Iowa State University
  • Buddhi P. Lamsal, Iowa State University
  • Tao Fei, Iowa State University
  • Hui Wang, Iowa State University
  • Lawrence A. Johnson, Iowa State University
  • Mohan Dasari, FEC Solutions
Document Type
Publication Version
Published Version
Publication Date
We determined the effects of a commercial proprietary formulation of polysaccharide hydrolyzing enzymes on ethanol fermentation performance, oil partitioning and recovery, and quality of dried distillers grains with solubles (DDGS) on a 1.5-L and 50-L fermentation scale. The enzyme was added at the start of fermentation. Whole beer was subjected to beer well incubation, distillation, and separation of thin stillage from the wet cake. The enzyme promoted faster ethanol production without affecting the final ethanol yield. The enzyme treatments resulted in 8–18% higher wet yield of thin stillage than the control, 13–21% of oil increase in thin stillage, and 11% fiber reduction in DDGS. Free oil recovery from thin stillage was improved by the enzyme treatments (13–53% increase). The present study shows that the use of the polysaccharide hydrolyzing enzymes can add benefits to ethanol plants by increasing corn oil yield and producing fermentation co-products with increased nutritional value and potentially broader applications in animal feeds

This article is from Journal of Bioprocess Engineering and Biorefinery, 2014; 3(4); 323-331. Doi: 10.1166/jbeb.2014.1106. Posted with permission.

Copyright Owner
American Scientific Publishers
File Format
Citation Information
Linxing Yao, Pawarisa Luangthongkam, Tong Wang, Buddhi P. Lamsal, et al.. "Improved Corn Ethanol Fermentation and Oil Distribution by Using Polysaccharide Hydrolyzing Enzymes" Journal of Bioprocess Engineering and Biorefinery Vol. 3 Iss. 4 (2014) p. 323 - 331
Available at: