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Applied Biochemistry and Biotechnology

, Volume 174, Issue 4, pp 1455–1470 | Cite as

Effect of Phytase Application During High Gravity (HG) Maize Mashes Preparation on the Availability of Starch and Yield of the Ethanol Fermentation Process

  • D. Mikulski
  • G. KłosowskiEmail author
  • A. Rolbiecka
Article

Abstract

Phytic acid present in raw materials used in distilling industry can form complexes with starch and divalent cations and thus limit their biological availability. The influence of the enzymatic hydrolysis of phytate complexes on starch availability during the alcoholic fermentation process using high gravity (HG) maize mashes was analyzed. Indicators of the alcoholic fermentation as well as the fermentation activity of Saccharomyces cerevisiae D-2 strain were statistically evaluated. Phytate hydrolysis improved the course of the alcoholic fermentation of HG maize mashes. The final ethanol concentration in the media supplemented with phytase applied either before or after the starch hydrolysis increased by 1.0 and 0.6 % v/v, respectively, as compared to the control experiments. This increase was correlated with an elevated fermentation yield that was higher by 5.5 and 2.0 L EtOH/100 kg of starch, respectively. Phytate hydrolysis resulted also in a statistically significant increase in the initial concentration of fermenting sugars by 14.9 mg/mL of mash, on average, which was a consequence of a better availability of starch for enzymatic hydrolysis. The application of phytase increased the attenuation of HG media fermentation thus improving the economical aspect of the ethanol fermentation process.

Keywords

Phytase Ethanol fermentation Availability of starch Ethanol yield HG mashes 

Notes

Acknowledgments

The work was supported by the National Science Centre grant (No. 2012/05/N/NZ9/02436).

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Department of BiotechnologyKazimierz Wielki UniversityBydgoszczPoland

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