Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Physicochemical Characteristics of the Mash Quality of Cheongju Prepared Using Different Nuruks

누룩종류를 달리한 청주 술덧의 이화학적 특성

  • Jeong, Myeong Eun (Dept. of Convergence Industry, Seoul Venture University) ;
  • Kang, Soon Ah (Dept. of Conversing Technology, Graduate School of Venture, Hoseo University) ;
  • Cheong, Chul (Dept. of Convergence Industry, Seoul Venture University)
  • 정명은 (서울벤처대학원대학교 융합산업학과) ;
  • 강순아 (호서대학교 융합공학과) ;
  • 정철 (서울벤처대학원대학교 융합산업학과)
  • Received : 2014.04.10
  • Accepted : 2014.08.07
  • Published : 2014.08.31
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Abstract

This study examined the physicochemical characteristics of mashing prepared using different Nuruks (traditional Nuruk, Nuruk added Aspergillus oryzae, Nuruk added Aspergillus kawachii, and Nuruk added Aspergillus oryzae and Aspergillus kawachii), and to obtain the basic data for Korean Cheongju production. The four different mashes were compared for their brewing characteristics and indicated a normal fermentation pattern. The Nuruk made from A. oryzae or A. kawachii showed higher fermentation ability than the other samples tested. In addition, the analyzed results of fermented mashing showed that the Nuruk made from A. oryzae or A. kawachii had a significantly higher aroma profile, such as higher alcohol and ester than the other samples tested, whereas the Nuruk made from a mixture of A. oryzae and A. kawachii had a much higher organic acid content. In conclusion, the Nuruk prepared using A. oryzae or A. kawachii had a positive effect on the complete fermentation and enhanced aroma compounds for Korean Cheongju production.

본 연구는 곰팡이 균종을 달리하여 제조한 다양한 누룩으로 담금한 술덧의 발효 중 품질특성을 비교하여 그 결과를 한국형 청주 제조에 적용하기 위한 이화학적인 기초자료를 확보하는데 그 목적이 있다. 동결건조된 Aspergillus oryzae와 Aspergillus kawachii를 액체 방식으로 각각 배양 후 전통방식으로 제조된 누룩에 각각 또는 혼합 접종시켜 배양후 누룩을 제조하였고, 그 누룩을 이용하여 발효 중 술덧의 품질 변화를 전통방식으로만 성형된 누룩으로 제조된 술덧의 품질과 이화학적으로 비교 평가하였다. 발효 술덧의 가용성 고형분, 알코올, 비중, 산도 등의 분석을 통해 A. oryzae와 A. kawachii를 각각 단독으로 배양한 누룩을 이용한 발효 술덧에서 발효가 가장 활발하게 일어났음을 알 수 있었다. 또한 술덧의 향과 맛에 가장 큰 영향을 미치는 퓨젤 오일과 에스터 성분 역시 A. oryzae와 A. kawachii를 각각 접종시켜 배양한 누룩으로 제조한 술덧에서 전통방식의 누룩 또는 A. oryzae와 A. kawachii를 혼합하여 배양한 누룩으로 제조한 술덧에서보다 유의적으로 높게 나타났다. 본 연구를 통해 기존 전통 누룩만을 이용하여 제조된 술덧에서 발생되는 불완전 발효와 약한 풍미 등을 개선시키기 위해서는 A. oryzae와 A. kawachii를 각각 접종시켜 배양시킨 누룩으로 술을 제조하는 것이 효과적인 것으로 나타났다.

Keywords

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