UVA-LED device to disinfect hydroponic nutrient solution

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Bibliographic Information

Title
UVA-LED device to disinfect hydroponic nutrient solution
Other Title
  • UVA-LEDを用いた水耕栽培養液殺菌
  • UVA-LED disinfect hydroponic solution
Author
Tsunedomi, Akari
Alias Name
  • 常冨, 愛香里
  • ツネドミ, アカリ
Author
Miyawaki, Katsuyuki
Alias Name
  • 宮脇, 克行
  • ミヤワキ, カツユキ
Author
Masamura, Akinori
Alias Name
  • マサムラ, アキノリ
  • マサムラ, アキノリ
Author
Nakahashi-Aihara, Mutsumi
Alias Name
  • (中橋)粟飯原, 睦美
  • (ナカハシ)アイハラ, ムツミ
Author
Mawatari, Kazuaki
Alias Name
  • 馬渡, 一諭
  • マワタリ, カズアキ
Author
Shimohata, Takaaki
Alias Name
  • 下畑, 隆明
  • シモハタ, タカアキ
Author
Uebansou, Takashi
Alias Name
  • 上番増, 喬
  • ウエバンソウ, タカシ
Author
Kinouchi, Yohsuke
Alias Name
  • 木内, 陽介
  • キノウチ, ヨウスケ
Author
Akutagawa, Masatake
Alias Name
  • 芥川, 正武
  • アクタガワ, マサタケ
Author
Emoto, Takahiro
Alias Name
  • 榎本, 崇宏
  • エモト, タカヒロ
Author
Takahashi, Akira
Alias Name
  • 髙橋, 章
  • タカハシ, アキラ
University
徳島大学
Types of degree
博士（栄養学）
Grant ID
甲栄第258号
Degree year
2018-03-23

Description

The number of plant factories in which crops are cultivated in an artificial environment has been increasing every year. In cultivation techniques involving hydroponics, plants are supplied with a circulating nutrient solution, which can become contaminated by pathogens that can propagate and spread throughout plant factories. Therefore, strategies to disinfect hydroponic nutrient solutions are needed. In this study, we developed a new disinfection device equipped with an ultraviolet A (UVA) light emitting diode (LED) that can be used to disinfect hydroponic nutrient solutions in plant factories. We first evaluated the basic disinfection capability of the device and then estimated its bactericidal effect in a small scale model system. The log survival ratio was related to UVA irradiation fluence and the volume of nutrient solution. From the assay results, we devised a kinetics equation to describe the relationship between nutrient solution volume, log survival ratio, and UVA fluence. Together our results show that UVA irradiation could be used to disinfect hydroponic nutrient solutions, and the derived kinetics equations can be used to determine optimal conditions, such as nutrient solution volume, UVA irradiation, and killing activity, to develop devices that disinfect hydroponic nutrient solutions.

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2019-09-06 再収集

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