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KMID : 1024420120160020139
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Food Engineering Progress
2012 Volume.16 No. 2 p.139 ~ p.144
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Quality Characteristics of Brewed Beer with Rice Adjunct
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Hyeun Sung-Ki
Kwon Young-An
Lee Seung-Ju
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Abstract
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The effects of rice adjunct on the quality attributes of beer were investigated. The results showed that the sweetness, reducing sugar content, and viscosity of beer were decreased while the pH was increased by the effect of rice content. This meant that the saccharification was not completed by the relatively reducing content of enzyme in malt, but it was recovered by the addition of α-amylase. The results showed that the additional α-amylase compensated for the reducing saccharification enzyme when the rice powder was added as adjunct. The alcohol content and the bubble stability in the beer were decreased while the bitterness and the yellowness were increased with increasing content of the rice powder. The turbidity of the beer also seemed to be increased with the rice content. Therefore, when the rice adjunct was added in beer brewing, the malt showed undesirable quality characteristics by decreasing saccharification enzyme but it could be improved by the addition of α-amylase.
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KEYWORD
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quality characteristics, beer, rice adjunct, amylase
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