Cellulose conversion in dry grind ethanol plants

Date
2008-08-01
Authors
Ladisch, Michael
Dale, Bruce
Tyner, Wally
Shanks, Brent
Mosier, Nathan
Kim, Youngmi
Cotta, Michael
Dien, Bruce
Blaschek, Hans
Laurenas, Edmund
Shanks, Brent
Verkade, John
Schell, Chad
Petersen, Gene
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NSF Engineering Research Center for Biorenewable ChemicalsChemical and Biological Engineering
Abstract

The expansion of the dry grind ethanol industry provides a unique opportunity to introduce cellulose conversion technology to existing grain to ethanol plants, while enhancing ethanol yields by up to 14%, and decreasing the volume while increasing protein content of distiller’s grains. The technologies required are cellulose pretreatment, enzyme hydrolysis, fermentation, and drying. Laboratory data combined with compositional analysis and process simulations are used to present a comparative analysis of a dry grind process to a process with pretreatment and hydrolysis of cellulose in distiller’s grains. The additional processing steps are projected to give a 32% increase in net present value if process modifications are made to a 100 million gallon/year plant.

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This article is published as Ladisch, Michael, Bruce Dale, Wally Tyner, Nathan Mosier, Youngmi Kim, Michael Cotta, Bruce Dien, Hans Blaschek, Edmund Laurenas, Brent Shanks, John Verkade, Chad Schell, and Gene Petersen. "Cellulose conversion in dry grind ethanol plants." Bioresource Technology 99, no. 12 (2008): 5157-5159. DOI: 10.1016/j.biortech.2007.09.082.

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