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Reduction of Nuruk Flavor in Korean Rice-Distilled Liquor Using SumizymeTM

SumizymeTM을 이용한 쌀 증류주의 누룩취 저감화

  • Kwak, Han Sub (Department of Food Science and Nutrition, Dankook University) ;
  • Kim, Misook (Department of Food Science and Nutrition, Dankook University) ;
  • Lee, Youngseung (Department of Food Science and Nutrition, Dankook University) ;
  • Eom, Taekil (Department of Food Science and Nutrition, Dankook University) ;
  • Seo, Yoojin (Department of Food Science and Nutrition, Dankook University) ;
  • Shim, Hyoungsuk (BHD Brewery Co., Ltd.) ;
  • Ha, Sang-Hyoung (BHD Brewery Co., Ltd.) ;
  • Yoon, Ok Hyun (Department of Food and Nutrition, Gimcheon University) ;
  • Jeong, Yoonhwa (Department of Food Science and Nutrition, Dankook University)
  • Received : 2015.02.12
  • Accepted : 2015.03.13
  • Published : 2015.06.30

Abstract

The objective of this study was to reduce Nuruk flavor in Korean rice-distilled liquor using different ratios of $Sumizyme^{TM}$ and Nuruk. After 9 days of fermentation at $28^{\circ}C$, alcohol contents and pH were 16.0~17.1% and 3.82~4.16, respectively. An increased ratio of $Sumizyme^{TM}$ decreased alcohol content while increased pH of the mash. In alcohol contents, there were no significant differences up to 30% substitution of Nuruk to $Sumizyme^{TM}$. A descriptive analysis was conducted with trained panelists for determining the intensity of Nuruk flavor. The intensities of Nuruk flavor in mashes and distilled liquors brewed by traditional Nuruk, cultured Nuruk, and a mixture of 30% $Sumizyme^{TM}$ and 70% cultured Nuruk were evaluated. The mash and distilled liquor prepared using a mixture of 30% $Sumizyme^{TM}$ and 70% cultured Nuruk showed significantly lower intensities of Nuruk flavor when compared with those of mashes and distilled liquors produced by the traditional and cultured Nuruk.

본 연구에서는 개량누룩을 정제효소로 대체하여 제조한 발효 술덧의 품질 특성을 알아보고, 정제효소의 대체가 누룩취 저감에 효과가 있는지를 검증하였다. 정제효소로의 대체량이 늘어날수록 발효 술덧의 특성은 부의 방향성을 보였다. 알코올 함량이 낮아 술의 생산 원가에 부정적인 영향을 미치는 것으로 나타났으며, pH가 높아져서 발효 시 유해미생물에 오염될 가능성이 높아질 것이라 보인다. 또한 가용성 고형분 함량도 높아서 개량누룩을 사용했을 때보다 발효가 늦게 진행되는 것이 발견되었다. 개량누룩의 사용량을 최대 30%까지 정제효소로 대체하였을 때 발효 술덧의 품질 변화에 유의미한 차이가 없었다. 정제효소($Sumizyme^{TM}$)로 30% 대체하여 제조된 발효 술덧 및 증류주는 누룩취의 강도에 있어서 개량누룩과 전통누룩으로 제조된 발효 술덧 및 증류주와 비교해서 통계적으로 낮은 누룩취 강도를 보여주었다. 누룩의 일부분을 정제효소로 대체함으로써 쌀 증류주의 누룩취를 저감할 수 있을 것이다.

Keywords

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