Development of a Controller for Fermentation in the Dry Grind Corn Process
Murthy, Ganti Suryanarayana
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https://hdl.handle.net/2142/86066
Description
Title
Development of a Controller for Fermentation in the Dry Grind Corn Process
Author(s)
Murthy, Ganti Suryanarayana
Issue Date
2006
Doctoral Committee Chair(s)
Singh, Vijay
Department of Study
Agricultural Engineering
Discipline
Agricultural Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Agricultural
Language
eng
Abstract
The controller maintained glucose concentration of <2.0% w/v in the fermenter throughout the SSF process. Reduced glucose concentrations minimize the osmotic shock to yeast and inhibit the growth of other competing microorganisms. Use of the optimal controller resulted in 50% reduction in glucoamylase amount required for the SSF process under varying operating conditions as compared to the standard SSF process. Optimal controller significantly improved final ethanol concentrations as compared to the conventional process without optimal controller under conditions of temperature and pH disturbances. Use of the optimal controller in conventional dry grind ethanol processes can result in estimated cost savings up to $1 million for a 151 million L/yr (40 million gal/yr) dry grind plant.
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