식품과학과 산업 (Food Science and Industry)

한국식품과학회 (Korean Society of Food Science and Technology)
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초음파를 활용한 식품 살균 기술의 연구 현황

Current status of research on microbial disinfection of food using ultrasound

  • 투고 : 2020.08.12
  • 심사 : 2020.08.31
  • 발행 : 2020.09.30
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초록

식품의 보존성 및 안전성 증대를 위해 살균이 필수적이다. 일반적으로 가열 살균 기술이 가장 많이 사용되고 있으나, 공정 중 식품의 품질 저하를 막기 위한 살균 기술로 신공정 기술을 활용한 비가열 살균 기술의 중요성이 대두되고 있다. 그 중에서도 초음파 기술은 특유의 캐비테이션 현상으로 미생물의 파괴가 촉진되어 살균 효과를 내는 것으로 알려져 있다. 초음파 기술 단독으로는 사멸 효과가 낮으며, 다양한 공정기술과 함께 적용하여 사멸 효과를 극대화할 수 있는 기술 개발을 위한 연구가 활발히 진행되고 있다. 초음파와 함께 처리할 수 있는 공정으로는 가열, 고압, 화학적 처리 등 전통적인 살균 방법 뿐 아니라 자외선 조사, PEF 등 신공정 기술이 있다. 초음파 기술을 적용한 다른 공정과 달리 살균 기술은 아직 실험실 수준에 머물러 있어 산업적 적용을 위한 장치의 개발, 최적 공정 확립 등 추가 연구가 필요하다.

Microbial disinfection is essential to increase the preservation and safety of food. In general, thermal sterilization technology is most frequently used, but it often causes nutrient denaturation, and deterioration of food quality. Accordingly, non-thermal sterilization using a novel technology is emerging as an alternative technology. Among them, ultrasonic technology produces a disinfection effect by promoting the destruction of microorganisms by cavitation. Ultrasound technology alone has a low effect, so research is being actively conducted to develop an effective technology by applying as a hurdle technology with various other technologies. Ultrasound can be treated with various processes including traditional sterilization methods such as heating, high pressure, and chemical treatment, as well as novel technologies such as ultraviolet irradiation. Ultrasound assisted sterilization technology still remains at the laboratory level, requiring additional research such as the development of equipment for industrial application and establishment of an optimal process.

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