Optimum Fermentation Conditions and Fermentation Characteristics of Mulberry (Morus alba) Wine

오디(Morus alba) 와인의 최적 발효조건 및 발효 특성

  • Kim, Yong-Suk (Research Center for Industrial Development of BioFood Materials, Chonbuk National University) ;
  • Jeong, Do-Yeong (Daesang Co. Ltd., Sunchang Factory) ;
  • Shin, Dong-Hwa (Faculty of Biotechnology (Food Science & Technology Major), Chonbuk National University)
  • 김용석 (전북대학교 바이오식품소재개발 및 산업화연구센터) ;
  • 정도영 (대상(주) 순창공장) ;
  • 신동화 (전북대학교 응용생물공학부(식품공학전공))
  • Published : 2008.02.28

Abstract

For the development of mulberry wine, we investigated its optimum fermentation conditions as well as quality changes during fermentation. The physicochemical characteristics of the mulberry fruit used in the study were pH 4.56, 0.50% titratable acidity, and 13.0 $^{circ}Brix$ soluble solids. The mulberry wine fermented with Saccharomyces cerevisiae KCCM 12224 (Sc-24) at 24 $^{circ}Brix$ soluble solids and $26^{circ}C$ showed excellent characteristics in terms of ethanol production, titratable acidity, and redness. The sucrose, fructose, and glucose contents of the mulberry wine drastically decreased with fermentation time. The citric acid content was maintained during the fermentation period, and malic acid decreased, but lactic and succinic acids increased. The cyanidin-3-glucoside content, a major anthocyanin pigment, of the mulberry wine drastically decreased from 195.5 mg% at the initial stage of fermentation to 15.37 mg% at 2 days of fermentation. However, cyanidin-3-rutinoside decreased gradually. In summary, a mulberry wine of high quality was made by fermentation for 8 days at $26^{\circ}C$ using mashed mulberry fruit containing $24^{\circ}Brix$ soluble solids, after adding 200 ppm $K_2S_2O_5$ and inoculating with 3%(v/v) Sc-24.

오디 와인의 제조를 위한 최적 발효 조건을 선정하였으며, 발효 중 이화학적 특성 및 anthocyanin 색소의 함량 변화를 조사하였다. 오디 원료의 일반 성분은 수분 83.75%, 조단백질 1.95%, 조지방 0.22%, 회분 0.97%이었으며, pH 4.56, 적정산도 0.50%, 가용성 고형분 13.0 $^{\circ}Brix$, 색도는 명도(L) 8.96, 적색도(a) 6.55, 황색도(b) 4.96으로 나타났다. 주요 유리당으로 fructose와 glucose가 검출되었으며, 주요 유기산으로 citric, malic, succinic acid가 검출되었다. 시험에 사용한 4종 효모 모두 오디 과즙에서 정상적인 알코올 발효를 하였으며, Saccharomyces cerevisiae KCCM 12224로 발효한 오디 와인의 에탄올 생성량과 적색도가 각각 11.0%와 3.60로서 가장 높았다. 가용성 고형분 24 $^{\circ}Brix$$26^{\circ}C$에서 발효시 에탄올 생성량, 적정산도 및 적색도 등에서 우수한 특성을 나타냈다. 오디와인의 발효 초기 주요 유리당은 sucrose, fructose 및 glucose 이었으며, 발효기간에 따라 현저히 감소하였다. 유기산 중 citric acid의 함량은 발효 기간 중 비슷하게 유지되었고, malic acid는 감소하였으며, lactic acid와 succinic acid는 증가하였다. 오디 와인의 주요 anthocyanin 색소는 cyanidin-3-glucoside(C-3-G)와 cyanidin-3-rutinoside(C-3-R)가 검출되었으며, C-3-G의 함량은 발효 초기 195.95mg%에서 발효 2일째 15.37 mg%로 급격한 감소를 보였으며, C-3-R은 발효 기간중 점차 감소하여 발효 10일째 45.53 mg%를 나타냈다. 이상의 결과로부터, 오디 와인 제조를 위하여 오디 마쇄액에 $K_2S_2O_5$ 200 ppm을 처리하고, 설탕으로 24 $^{\circ}brix$로 보당한 후 S. cerevisiae KCCM 12224 배양액 3%(v/v)를 접종하여 $26^{\circ}C$에서 8일 동안 발효하는 것이 최적 조건인 것으로 나타났다.

Keywords

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