[3Ip] Processing, Manufacturing technology

[3Ip-06] Effects of sterilization using a batch- or inline-type Aqua-gas treatment on agricultural materials and their components

*Tetsuro Ogawa¹, Noriteru Tosa¹, Kozue Kobayashi¹, Hiromasa Tabata¹, Shinobu Watanabe¹, Itaru Sotome², Seiichiro Isobe³ (1. Shimane Institute for Industrial Technology, 2. Graduate School of Agricultural and Life Sciences, The University of Tokyo, 3. College of Industrial Technology, Nihon University)

Keywords:broccoli, egoma seed, Aqua-gas, sterilization, maintaining component

【Purpose】 Shimane Prefecture is promoting the cultivation of ‘izumoforte’, a kind of broccoli that contains high amounts of glucoraphanin. We investigated the effects of sterilization using a batch-type Aqua-gas (AQG) treatment on this component. We also investigated the effects of sterilization on a component of egoma seed using an inline-type AQG treatment.¹⁾
【Method】 Samples of broccoli (variety unknown) were subjected to AQG or steaming treatment using a batch-type AQG treatment device. The effects of sterilization on the component content were then examined. Additionally, samples of egoma seed were subjected to batch- or inline-type AQG treatment, and the degree of oil oxidation after sterilization was analyzed.
【Results】 In broccoli, 30 sec of either treatment resulted in a viable microbial cell count below the detection limit. Glucoraphanin was retained better under the AQG treatment. In egoma seed, 5 min of inline-type AQG treatment resulted in a cell count below the detection limit. The degree of oil oxidation in the AQG-treated seed was not much difference from that in untreated seed.
1) Ogawa et al., 2023. Food Sci. Technol. Res., 29, 221-230.