Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Optimization of Thickness and Maturation Period of Andong-Soju Nuruk for Fermentation of Andong-Soju

안동소주 누룩 제조를 위한 누룩 두께 및 누룩 띄움시간의 최적화

  • Bae, Kyung-Hwa (Department of Food and Nutrition, Andong National University) ;
  • Ryu, Hee-Young (Department of Food and Nutrition, Andong National University) ;
  • Kwun, In-Sook (Department of Food and Nutrition, Andong National University) ;
  • Kwon, Chong-Suk (Department of Food and Nutrition, Andong National University) ;
  • Sohn, Ho-Yong (Department of Food and Nutrition, Andong National University)
  • 배경화 (안동대학교 식품영양학과) ;
  • 류희영 (안동대학교 식품영양학과) ;
  • 권인숙 (안동대학교 식품영양학과) ;
  • 권정숙 (안동대학교 식품영양학과) ;
  • 손호용 (안동대학교 식품영양학과)
  • Published : 2007.09.28
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Abstract

To support the fermentational superiority of Korean nuruks and maintain the various domestic nuruks, the optimal nuruk production of Andong-Soju, which was designated as an intangible cultural asset of Gyungsangbukdo province from 1987, was investigated. Different thickness of nuruks ($2.2{\sim}5.5\;cm$) were manufactured based on traditional Andong-Soju nuruk method, while the size of round form of nuruk was set to 23 cm. During the 3 weeks maturation, changes of water content, weight, pH, brix, the amount of reducing sugar, sac-charifying activity, viable cell and major microorganisms were determined, Also, ethanol fermentation abilities of the manufactured nuruks were evaluated using 20% glucose medium or 16% starch medium, respectively. Our results indicated that the production of high quality of Andong-Soju nuruk needs $4.0{\sim}5.5\;cm$ thickness and 3 weeks maturation without extraneous yeast addition. These results would be applied to production of homogeneous, and high quality of Andong-Soju nuruk.

전통주의 다양성과 국내 누룩의 우수성을 확보하기 위한 연구의 일환으로, 민속주 안동소주의 자가 제조 누룩의 최적 제조조건을 검토하였다. 안동소주 제조의 전통적인 누룩 제조방법을 준수하면서 23 cm 지름의 $2.2{\sim}5.5\;cm$의 다양한 두께의 누룩을 성형하고, 3주간 띄움 과정을 거치면서 1주일 간격으로 수분함량, pH, brix, 무게변화, 전분 당화능, 환원당 함량, 생균수 및 우점종 변화 등을 조사하였다. 그 결과 두께 4.0 cm 이상으로 성형된 누룩이 전분 당화능력 및 생균수, 누룩 곰팡이 생육면에서 가장 우수하였으며, 에탄올 발효면에서는 2주간의 띄움이, 안동소주의 누룩곰팡이를 이용한 관능적 측면에서는 3주간의 띄움이 필요하다고 판단되었다. 실제 제조된 누룩으로 포도당 및 전분 발효배지에서 에탄을 발효시킨 결과, 누룩 성형시 $4.0{\sim}5.5\;cm$ 두께로 성형하여 $2{\sim}3$주간 누룩을 띄운 경우가 가장 우수한 결과를 나타내었다. 또한 누룩 제조시 별도의 건조효모 첨가는 불필요함을 확인하였다. 본 연구결과는 전통적인 안동소주 제조법하에서 자가제조 누룩의 두께와 띄움시간을 조정하여 누룩의 균일 제조과 효율적인 생산이 가능함을 제시하고 있다.

Keywords

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