Utilization of spent brewer’s yeast for supplementation of distillery corn mashes

Witold Pietrzak; Joanna Kawa-Rygielska

doi:10.2478/pjct-2013-0076

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Utilization of spent brewer’s yeast for supplementation of distillery corn mashes

Green Sciences

Volume 15 (2013): Issue 4 (December 2013)

By: Witold Pietrzak and Joanna Kawa-Rygielska

Open Access

|Dec 2013

Abstract

The aim of the study was to use spent brewer’s yeast biomass (SBY) as a nutrient adjunct of distillery type corn mashes to improve the process of ethanol fermentation by yeast Saccharomyces cerevisiae. There were prepared corn mashes with raw material loading at 20% ww. with SBY addition at solids loadings of 0 (control); 0.1; 0.5; 0.7; 1.0; 3.0 and 5.0% ww. The obtained mashes were inoculated with yeast and subjected to batch fermentation for 72 h. It was observed that supplementation of corn mashes with SBY improved the process of fermentation. The consumption of sugars and production of ethanol by yeast in supplemented mashes was accelerated and the overall ethanol yield was improved by 6.5 to 11% depending on the amount of added SBY. It was also observed that the fermentation could be shortened by 24 h in mashes enriched with SBY.

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Articles in this issue

DOI: https://doi.org/10.2478/pjct-2013-0076 | Journal eISSN: 3072-0389

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Language: English

Page range: 102 - 106

Published on: Dec 31, 2013

Published by: West Pomeranian University of Technology, Szczecin

In partnership with: Paradigm Publishing Services

Publication frequency: Volume open

Keywords:

ethanol fermentation,

corn mash,

spent brewer’s yeast,

Saccharomyces cerevisiae

Related subjects:

Industrial chemistry,

Biotechnology,

Chemical engineering,

Process engineering

© 2013 Witold Pietrzak, Joanna Kawa-Rygielska, published by West Pomeranian University of Technology, Szczecin
This work is licensed under the Creative Commons License.

Volume 15 (2013): Issue 4 (December 2013)