Inactivation of <i>Vibrio parahaemolyticus</i> using UV light-emitting diode
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- MASAIKE Mie
- 東京大学大学院 工学系研究科都市工学専攻
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- OGUMA Kumiko
- 東京大学 先端科学技術研究センター
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- HASHIMOTO Takashi
- 東京大学大学院 工学系研究科都市工学専攻
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- TAKIZAWA Satoshi
- 東京大学大学院 工学系研究科都市工学専攻
Bibliographic Information
- Other Title
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- 紫外発光ダイオードによる腸炎ビブリオ(<i>Vibrio parahaemolyticus</i>)の不活化
- 紫外発光ダイオードによる腸炎ビブリオ(Vibrio parahaemolyticus)の不活化
- シガイ ハッコウ ダイオード ニ ヨル チョウエン ビブリオ(Vibrio parahaemolyticus)ノ フカツカ
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Abstract
UV light-emitting diode (UV-LED) was investigated in regard to the potential application to aquaculture industry. Vibrio parahaemolyticus, a pathogenic bacterium which often causes problems in the aquaculture industry, was suspended in artificial seawater or phosphate buffer saline (PBS) solution which was then irradiated by UV-LEDs with peak emission wavelength at 265, 280 or 300 nm. Inactivation efficiency was evaluated by cultivation assay. The results revealed that inactivation rate constant, k, in artificial seawater was 0.38, 0.24 and 0.02 cm2 /mJ under 265, 280, 300 nm UV-LEDs, respectively, while the k value in PBS was 0.40, 0.28 and 0.02 cm2 /mJ under 265, 280, 300 nm emmissions, respectively. Namely, the k value was highest for 265 nm UV-LED in either solution. On the other hand, electric energy consumption required for 3-log inactiveation, EEL3, in artificial seawater was 0.92, 0.42 and 4.15 kW/m3, and in PBS was 0.80, 0.41 and 4.71 kW/m3 under 265, 280 and 300 nm UV-LEDs, respectively. Thus, electrical efficiency was highest for the 280 nm UV-LED in either solution. This study provides fundamental knowledge on UV-LED applications to aquaculture industry.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)
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Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 74 (7), III_225-III_230, 2018
Japan Society of Civil Engineers