Yeast Selection and Comparison of Sterilization Method for Making Strawberry Wine and Changes of Physicochemical Characteristics during Its Fermentation

딸기주 발효를 위한 효모 선발과 살균 방법의 비교 및 발효 중 이화학적 특성의 변화

  • Jeong, Eun-Jeong (Faculty of Biotechnology (Food Science & Technology Major), Chonbuk National University) ;
  • Kim, Yong-Suk (Research Center for Industrial Development of BioFood Materials, Chonbuk National University) ;
  • Jeong, Do-Youn (Sunchang Food and Science Institute) ;
  • Shin, Dong-Hwa (Faculty of Biotechnology (Food Science & Technology Major), Chonbuk National University)
  • 정은정 (전북대학교 응용생물공학부(식품공학)) ;
  • 김용석 (전북대학교 바이오식품 소재 개발 및 산업화 연구센터) ;
  • 정도연 (순창장류연구사업소) ;
  • 신동화 (전북대학교 응용생물공학부(식품공학))
  • Published : 2006.10.01

Abstract

Yeast selection and the sterilization methods of strawberry juice were optimized for making strawberry wine. In addition, changes in the physicochemical characteristics of the wine during its fermentation were estimated. Maehyang and Yukbo cultivars of strawberry were tested for wine making; they contained 9.8 and 9.3% soluble solids and 0.59 and 0.58% titratable acidities, respectively. Among six yeasts tested, the Wg-15 and Sc-51 strains were selected based on the alcohol yield in the strawberry wine. Alcohol and soluble solid contents following heat treatment ($85^{\circ}C$, 10 min) or $K_2S_2O_5$ (200 ppm) treatment for sterilization were 7.10-7.20% and 5.60-5.80%, respectively, and no differences were observed between the Wg-15 and the Sc-51 strains. However, the flavor of wine produced following heat treatment was slightly better than that following $K_2S_2O_5$ treatment. The greatest amounts of alcohol were produced after 2 days of fermentation at $26^{\circ}C$. The alcohol content in wines produced with 12, 14, and 16% sugar content in the initial stages were 5.1, 6.0-6.2, and 7.5-7.7%, and the soluble solid contents were 3.9-4.3, 4.1-4.3, and 5.0-5.3%, respectively; no significant differences were observed between the Wg-15 and the Sc-51 yeast strains. For making strawberry wine, we proposed that the sugar content of Maehyang or Yukbo cultivars be adjusted to 16% soluble solids in the initial stages with heat treated at $85^{\circ}C$ for 10 min and fermentation with the Wg-15 or Sc-51 yeast strains at $26^{\circ}C$ for 8 days.

Keywords

strawberry wine;alcohol fermentation;yeast selection;sterilization method;sugar addition

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