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Infrared Assisted Freeze-Drying (IRAFD) to Produce Shelf-Stable Insect Food from Protaetia brevitarsis (White-Spotted Flower Chafer) Larva

한국축산식품학회지 2020년 40권 5호 p.813 ~ 830
Khampakool Apinya, Soisungwan Salinee, 유상권, 박성희,
소속 상세정보
 ( Khampakool Apinya ) - Gangneung-Wonju National University Department of Marine Food Science and Technology
 ( Soisungwan Salinee ) - Gangneung-Wonju National University Department of Marine Food Science and Technology
유상권 ( You Sang-Guan ) - Gangneung-Wonju National University Department of Marine Food Science and Technology
박성희 ( Park Sung-Hee ) - Seoul National University of Science and Technology Department of Food Science and Technology

Abstract


In this study, the potential of infrared assisted freeze-drying (IRAFD) was tested for the production of shelf-stable edible insects: Protaetia brevitarsis larva (larva of white-spotted flower chafer). The IRAFD system was customized using an infrared lamp, K-type thermocouple, controller, and data acquisition system. The infrared lamp provided the sublimation energy for rapid freeze-drying (FD). The IRAFD conditions were continuous IRAFD-5.0 kW/m2 and IRAFD-5.0 kW/m2 at different weight reduction (WR) (10%, 20%, and 30%). The continuous IRAFD reduced the drying time to 247 min compared to the 2,833 min duration of FD (p<0.05). The electrical energy could be reduced by more than 90% through infrared radiation during FD (p<0.05). The Page model resulted in the best prediction among the tested drying kinetic models. In terms of quality, IRAFD showed significantly lower hardness, chewiness, and higher protein levels than hot air drying and FD (p<0.05). IRAFD better preserved the glutamic acid (6.30?7.29 g/100 g) and proline (3.84?5.54 g/100 g). The external product appearance after IRAFD exhibited more air pockets and volume expansion, which might result in a good consumer appeal. In conclusion, this study reports the potential of IRAFD in producing shelf-stable and value-added edible insects.

키워드

red assisted freeze-drying; insect; energy; efficiency; texture

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