Food Engineering Progress (산업식품공학)

Korean Society for Industrial Food Engineering (한국산업식품공학회)
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Development of the Purge-type Controlled Atmosphere Storage Container and Analysis of Gas Control Performance

배출식 CA저장 컨테이너 개발과 기체제어성능 분석

  • Park, Seok Ho (Division of Postharvest Engineering, National Institute of Agricultural Science) ;
  • Park, Jong Woo (Division of Postharvest Engineering, National Institute of Agricultural Science) ;
  • Choi, Dong Soo (Division of Postharvest Engineering, National Institute of Agricultural Science) ;
  • Kim, Jin Se (Division of Postharvest Engineering, National Institute of Agricultural Science) ;
  • Kim, Yong Hun (Division of Postharvest Engineering, National Institute of Agricultural Science) ;
  • Choi, Seung Ryul (Division of Postharvest Engineering, National Institute of Agricultural Science) ;
  • Oh, Sung Sik (Division of Postharvest Engineering, National Institute of Agricultural Science) ;
  • Oh, Yu Seok (Division of Postharvest Engineering, National Institute of Agricultural Science) ;
  • Lee, Jin Su (Postharvest Research Team, National Institute of Horticultural & Herbal Science)
  • 박석호 (국립농업과학원 농업공학부) ;
  • 박종우 (국립농업과학원 농업공학부) ;
  • 최동수 (국립농업과학원 농업공학부) ;
  • 김진세 (국립농업과학원 농업공학부) ;
  • 김용훈 (국립농업과학원 농업공학부) ;
  • 최승렬 (국립농업과학원 농업공학부) ;
  • 오성식 (국립농업과학원 농업공학부) ;
  • 오유석 (국립농업과학원 농업공학부) ;
  • 이진수 (국립원예특작과학원 저장유통연구팀)
  • Received : 2015.12.14
  • Accepted : 2016.01.19
  • Published : 2016.02.29
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Abstract

This study was conducted to develop and evaluate an appropriate control device for a purge type controlled atmosphere (CA) storage in Korea. To determine ideal performance, oxygen and carbon dioxide control capability and airtightness were analyzed according to the postharvest management manual of CA storage of Fuji apples. In shortened experiments for CA storage, the condition was delayed CA at $0-0.5^{\circ}C$ for three days and stored at 0.1-0.5% carbon dioxide levels for 3 days and then further stored 6 days under 1% carbon dioxide. As a result, the temperature control range of a developed CA container was $0.0-0.5^{\circ}C$, and the relative humidity was more than 90%, except for the defrosting step for the freezer during the storage period. The rate of pressure reduction for the CA container in the negative and positive pressure states was 0.45 and $0.21mmH_2O/min$, respectively, and it was twofolds higher than standard airtightness for CA storage. After nitrogen injection, oxygen concentration was achieved at 2%, and carbon dioxide concentration was maintained at 0.1-0.5% for 6 days. Afterwards, carbon dioxide levels were tightly controlled between 0.1-1.0%. These results suggest that a developed purge type CA container could be effective in commercially maintaining the quality of agricultural products.

본 연구에서는 우리나라 여건에 적합하다고 판단되는 배출식 CA컨테이너를 개발하고 성능을 평가하였다. CA컨테이너 제어장치의 성능은 수확후 관리 매뉴얼에서 제시한 후지 사과의 CA저장 방법에 따라 산소 및 이산화탄소 농도의 정밀제어 능력을 평가하였다. 본 연구에서는 CA컨테이너의 성능을 평가하기 위하여 사과 4.5톤을 적재하고, 온도는 $0-0.5^{\circ}C$, 지연CA기간은 3일, 이산화탄소 농도를 0.5%이하로 조절하는 기간은 3일, 이산화탄소 농도를 1.0% 이하로 6일간 저장하는 단축실험을 수행하였다. 그 결과 온도는 $0.0-0.5^{\circ}C$, 습도는 냉동기 가동과 제상이 진행될 때를 제외하고는 90.0% 이상을 유지하였다. CA컨테이너의 기밀성능을 판단하기 위한 감압율은 양압에서 $0.21mmH_2O/min$, 음압 $0.45mmH_2O/min$로 CA저장고의 기밀유지기준 보다 2배 이상 우수한 것으로 나타났다. 또한 컨테이너 내부의 기체농도는 후지 사과입고 후 6일까지 이산화탄소가 0.1-0.5%, 이후에는 0.1-1.0%로 정밀하게 제어되었으며, CA 기체조성 후 산소의 농도는 2%가량으로 유지되었다. 따라서 본 연구에서 개발한 CA저장 컨테이너는 정밀자동제어가 가능하며 모든 CA저장 요구조건을 충족시켜 상용화가 가능하다고 판단된다.

Keywords

Acknowledgement

Supported by : 농촌진흥청

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