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Title: Increasing ethanol yield through fiber conversion in corn dry grind process

Abstract

Conversion of corn fiber to ethanol in the dry grind process could increase ethanol yields, reduce downstream processing costs and improve overall process profitability. In this work, we investigate the in-situ conversion of corn fiber into ethanol (cellulase addition during simultaneous saccharification and fermentation) during dry grind process. Addition of 30 FPU/g fiber cellulase resulted in 4.6% increase in ethanol yield compared to the conventional process. Use of excess cellulase (120 FPU/g fiber) resulted in incomplete fermentation and lower ethanol yield compared to the conventional process. Lastly, multiple factors including high concentrations of ethanol and phenolic compounds were responsible for yeast stress and incomplete fermentation in excess cellulase experiments.

Authors:
 [1];  [1];  [1];  [1];  [2]
  1. University of Illinois at Urbana-Champaign, Urbana, IL (United States). Agricultural and Biological Engineering
  2. University of Illinois at Urbana-Champaign, Urbana, IL (United States). Agricultural and Biological Engineering and DOE Center for Advanced Bioenergy and Bioproducts Innovation
Publication Date:
Research Org.:
Center for Advanced Bioenergy and Bioproducts Innovation (CABBI), Urbana, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1478367
Grant/Contract Number:  
SC0018420
Resource Type:
Accepted Manuscript
Journal Name:
Bioresource Technology
Additional Journal Information:
Journal Volume: 270; Journal Issue: C; Journal ID: ISSN 0960-8524
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; Corn fiber; Cellulosic ethanol; Dry grind; Cellulase; Phenolic compounds

Citation Formats

Kurambhatti, Chinmay V., Kumar, Deepak, Rausch, Kent D., Tumbleson, M. E., and Singh, Vijay. Increasing ethanol yield through fiber conversion in corn dry grind process. United States: N. p., 2018. Web. doi:10.1016/j.biortech.2018.09.120.
Kurambhatti, Chinmay V., Kumar, Deepak, Rausch, Kent D., Tumbleson, M. E., & Singh, Vijay. Increasing ethanol yield through fiber conversion in corn dry grind process. United States. doi:10.1016/j.biortech.2018.09.120.
Kurambhatti, Chinmay V., Kumar, Deepak, Rausch, Kent D., Tumbleson, M. E., and Singh, Vijay. Tue . "Increasing ethanol yield through fiber conversion in corn dry grind process". United States. doi:10.1016/j.biortech.2018.09.120. https://www.osti.gov/servlets/purl/1478367.
@article{osti_1478367,
title = {Increasing ethanol yield through fiber conversion in corn dry grind process},
author = {Kurambhatti, Chinmay V. and Kumar, Deepak and Rausch, Kent D. and Tumbleson, M. E. and Singh, Vijay},
abstractNote = {Conversion of corn fiber to ethanol in the dry grind process could increase ethanol yields, reduce downstream processing costs and improve overall process profitability. In this work, we investigate the in-situ conversion of corn fiber into ethanol (cellulase addition during simultaneous saccharification and fermentation) during dry grind process. Addition of 30 FPU/g fiber cellulase resulted in 4.6% increase in ethanol yield compared to the conventional process. Use of excess cellulase (120 FPU/g fiber) resulted in incomplete fermentation and lower ethanol yield compared to the conventional process. Lastly, multiple factors including high concentrations of ethanol and phenolic compounds were responsible for yeast stress and incomplete fermentation in excess cellulase experiments.},
doi = {10.1016/j.biortech.2018.09.120},
journal = {Bioresource Technology},
number = C,
volume = 270,
place = {United States},
year = {2018},
month = {9}
}

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Cited by: 2 works
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