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Enzyme treatment for clarification of spoiled oriental melon juice

참외 저급과 주스의 청징화를 위한 효소처리 조건

  • Jang, Se-Jin (Department of Food Science and Technology, Keimyung University and KMF Co., Ltd.) ;
  • Jo, Yong-Jun (Department of Food Science and Technology, Kyungpook National University and KMF Co., Ltd.) ;
  • Seo, Ji-Hyung (Division of Food, Beverage and Culinary Arts, Yeungnam University College) ;
  • Kim, Ok-Mi (Faculty of Hotel Culinary Arts, Taekyeung College) ;
  • Jeong, Yong-Jin (Department of Food Science and Technology, Keimyung University and KMF Co., Ltd.)
  • 장세진 (계명대학교 식품가공학과 및 (주)케이엠에프) ;
  • 조용준 (경북대학교 식품공학과 및 (주)케이엠에프) ;
  • 서지형 (영남이공대학교 식음료조리계열) ;
  • 김옥미 (대경대학교 호텔조리학부) ;
  • 정용진 (계명대학교 식품가공학과 및 (주)케이엠에프)
  • Received : 2014.03.18
  • Accepted : 2014.05.27
  • Published : 2014.08.30

Abstract

In Gyeongsangbuk-do seongju area, hundreds of tons of spoiled oriental melon are harvested annually. Therefore, ways to prevent such spoilage are needed. This study was conducted to investigate the quality characteristics of spoiled oriental melon juice after enzyme treatment for the production of oriental melon concentrate. The treatment of the oriental melon juice with three kinds of enzymes with variable concentrations showed the following results. PECE(1), which was compounded pectinase and cellulase at 0.01% (v/v), gave the melon a 0.16 brown color and 0.01 turbidity, and the highest L value of 97.00. The detected free sugar contents were fructose, glucose and sucrose, with the amount of sucrose the highest at roughly 4,000 mg%. The mixture of different enzyme treatments resulted in a 0.15 brown color and 0.01 turbidity at 60 minutes, and the L value was high at 97.25. The enzyme treatment temperatures of $50^{\circ}C$ and $60^{\circ}C$ yielded a low-level brown color and low turbidity, but the L values were high at $60^{\circ}C$ and $70^{\circ}C$. These results showed that 0.01% (v/v) mixing enzyme, i.e., pectinase and cellulose compounded at $60^{\circ}C$ for 60 min, must be used for the production of oriental melon concentrate.

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