Improving the quality of vegetable foodstuffs by microwave inactivation

  • Won-Il Cho
  • Myong-Soo ChungEmail author


With the aim of improving the loss of quality in retorted vegetables, experiments on pretreatment inactivation using microwaves were carried out to allow the heating intensity to be reduced during retorting. Microwave heating reduced the bacteria level by 103 CFU/g, and was a more effective method considering the short processing time of 3 min and the required energy being 70–80% of that when using steam. The inactivation effect was due to dielectric heat generation by the high-frequency microwaves. The inactivation effect for heat-resistant Bacillus amyloliquefaciens was indicated by a reduction of 102 CFU/g after 3 min of microwave heating. The total bacteria counts for peeled potato and spicy sauce with vegetables decreased by 3–4 log CFU/g after 3 min using microwaves, and heat-resistant microorganisms were reduced by 2 log CFU/g. Combining microwave heating and mild retorting is expected to produce higher quality vegetable foodstuffs compared to conventional retorting.


Microwave heating Vegetable foodstuffs Pretreatment inactivation Dielectric Retort 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© The Korean Society of Food Science and Technology 2019

Authors and Affiliations

  1. 1.CJ Foods R&DCJCheiljedang Corp.SuwonKorea
  2. 2.Department of Food Science and EngineeringEwha Womans UniversitySeoulKorea

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