Prediction of beer foam stability from malt components
Kordialik-Bogacka, E.,Technical Univ. of Lodz (Poland). Inst. of Fermentation Technology and Microbiology | Antczak, N.,Technical Univ. of Lodz (Poland). Inst. of Fermentation Technology and Microbiology
Industrial unhopped worts produced from different batches of commercial malt were taken to analyse the contents of compounds related to beer foam stability, such as polypeptides, polyphenols, and beta-glucan. Kolbach index of malts was also determined. Foam stability of beers produced from these wort batches was measured and the relationship between the foam stability and malt components was sought. The findings showed that the great variation in total and hydrophobic polypeptides as well as beta-glucan contents among malt batches did not substantially influence the beer foam stability. None of the studied malt parameters correlated highly with the foam stability. The results showed that it is difficult to predict the foam performance relying on the polypeptides, beta-glucan, or polyphenol contents in malt. It seems that the scope for the beer foam stability improvement by the malt selection is not considerable.
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