Cellulose conversion in dry grind ethanol plants.
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.
Ladisch
Michael
M
Laboratory of Renewable Resources Engineering, Purdue University, West Lafayette, IN 47907, USA. carie@purdue.edu
Dale
Bruce
B
Tyner
Wally
W
Mosier
Nathan
N
Kim
Youngmi
Y
Cotta
Michael
M
Dien
Bruce
B
Blaschek
Hans
H
Laurenas
Edmund
E
Shanks
Brent
B
Verkade
John
J
Schell
Chad
C
Petersen
Gene
G
D002482:Cellulose / Q000378:metabolism*; D000431:Ethanol / Q000737:chemistry* / Q000378:metabolism*; D005285:Fermentation; D006868:Hydrolysis; D009005:Monosaccharides / Q000378:metabolism; D003313:Zea mays / Q000378:metabolism
D009005:Monosaccharides; D000431:Ethanol; D002482:Cellulose