Increasing ethanol yield through fiber conversion in corn dry grind process

Kurambhatti, Chinmay V.; Kumar, Deepak; Rausch, Kent D.; Tumbleson, M. E.; Singh, Vijay

doi:10.1016/j.biortech.2018.09.120

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:

Kurambhatti, Chinmay V. ^[1]; Kumar, Deepak ^[1]; Rausch, Kent D. ^[1]; Tumbleson, M. E. ^[1]; Singh, Vijay ^[2]

University of Illinois at Urbana-Champaign, Urbana, IL (United States). Agricultural and Biological Engineering
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:: 2018-09-25

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)

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.

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                    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.  https://doi.org/10.1016/j.biortech.2018.09.120

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                    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.  https://doi.org/10.1016/j.biortech.2018.09.120.  https://www.osti.gov/servlets/purl/1478367.

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@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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Journal Article:

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https://doi.org/10.1016/j.biortech.2018.09.120

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Cited by: 2 works

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Figures / Tables:

Table 1: Effect of 30 FPU/g fiber on cellulase addition in conventional dry grind process.

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Table 1 (p. 12)

Table 2 (p. 13)

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