Application of ultraviolet light-emitting diodes to suppress microorganisms in water

2017 Fiscal Year Final Research Report

• Project/Area Number: 26289181
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Civil and environmental engineering
• Research Institution: The University of Tokyo
• Principal Investigator: Oguma Kumiko 東京大学, 先端科学技術研究センター, 准教授 (00361527)
• Co-Investigator(Kenkyū-buntansha): 春日 郁朗 東京大学, 大学院工学系研究科(工学部), 准教授 (20431794)
• Co-Investigator(Renkei-kenkyūsha): LOHWACHARIN Jenyuk 東京大学, 大学院工学系研究科, 特任助教 (60709517)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 水処理 / 消毒 / 紫外線 / 発光ダイオード（LED） / 水系感染症

Outline of Final Research Achievements

This study aimed to propose the application of ultraviolet light-emitting diodes (UV-LED) for water disinfection and elucidate the effectiveness and challenges of the technology. UV-LEDs with different peak emissions were applied to various microorganisms to examine the dose-response properties. UV-LED module designed for point-of-use (POU) of water or point-of-entry (POE) to buildings were evaluated by lab-scale experiments and a field test. Furthermore, field survey in Hanoi, Vietnam, was conducted to examine the feasibility and local needs for UV-LED water treatment at household level. This study demonstrated the effectiveness and technical challenges of UV-LED to be applied for water treatment and developed fundamental knowledge base for module development and practical applications.

Free Research Field

環境工学