Development of a new water sterilization device with a 365 nm UV-LED

  title={Development of a new water sterilization device with a 365 nm UV-LED},
  author={Mirei Mori and Akiko Hamamoto and Akira Takahashi and Masayuki Nakano and Noriko Wakikawa and Satoko Tachibana and Toshitaka Ikehara and Yutaka Nakaya and Masatake Akutagawa and Yohsuke Kinouchi},
  journal={Medical \& Biological Engineering \& Computing},
  • M. Mori, A. Hamamoto, Y. Kinouchi
  • Published 3 November 2007
  • Materials Science, Medicine, Computer Science
  • Medical & Biological Engineering & Computing
Ultraviolet (UV) irradiation is an effective disinfection method. In sterilization equipment, a low-pressure mercury lamp emitting an effective germicidal UVC (254 nm) is used as the light source. However, the lamp, which contains mercury, must be disposed of at the end of its lifetime or following damage due to physical shock or vibration. We investigated the suitability of an ultraviolet light-emitting diode at an output wavelength of 365 nm (UVA-LED) as a sterilization device, comparing with… 

An Investigation of the Sterilization Effect of 385 nm UVA-LED

Ultraviolet (UV) sterilization has been used for reducing the bacteria count. A UV-lightemitting diode (LED) has investigated as a simple alternative light source to standard mercury lamp which has

Using UVC Light-Emitting Diodes at Wavelengths of 266 to 279 Nanometers To Inactivate Foodborne Pathogens and Pasteurize Sliced Cheese

The results showed that inactivation rates after UV-LED treatment were significantly different from those of UV lamps at a similar intensity, and on microbiological media,UV-LED treatments at 266 and 270 nm showed significantly different inactivation effects than other wavelength modules.

Point-of-use water disinfection using UV light-emitting diodes to reduce bacterial contamination

The results indicate that bacterial inactivation was achieved in a time-dependent manner, with 1- and 2.5-log E. coli reductions in water following 20 and 50 min of UV LED exposure, respectively.

Effects of ultraviolet light emitting diodes (LEDs) on microbial and enzyme inactivation of apple juice.

Vegetable surface sterilization system using UVA light-emitting diodes.

A UVA-LED (Ultra Violet A-Light Emitting Diode) system for surface sterilization that is safe, efficacious, low cost, and apparently harmless to fresh produce is reported.

LED revolution: fundamentals and prospects for UV disinfection applications

The UV-light emitting diode (LED) has been attracting significant attention as a new UV source that can replace conventional mercury gas-filled lamps in water disinfection applications. However, the



UV Excimer Lamp Irradiation of Fibroblasts: The Influence on Antioxidant Homeostasis

UV excimer lamps are efficient and economical narrowband sources of UVB and UVC radiation. Potentially, these lamps may be used in bacterial disinfection or in minor cosmetic procedures, but safety

Testing the equivalency of ultraviolet light and chlorine for disinfection of wastewater to reclamation standards

Full‐scale ultraviolet (UV) light and chlorine disinfection systems were operated in parallel using nitrified and partially denitrified tertiary treated wastewater effluent. A UV dose of 75 mW ·

Comparative assessment of chlorine, heat, ozone, and UV light for killing Legionella pneumophila within a model plumbing system

All four methods proved efficacious in eradicating L. pneumophila from a model plumbing system andHigher temperature enhanced the disinfecting efficacy of chlorine, but higher temperature accelerated the decomposition of the chlorine residual such that an additional 120% volume of chlorine was required.

UV inactivation of pathogenic and indicator microorganisms

Survival was measured as a function of the dose of germicidal UV light for the bacteria Escherichia coli, Salmonella typhi, Shigella sonnei, Streptococcus faecalis, Staphylococcus aureus, and

Development of Toxic Degradation Products during Heat Sterilization of Glucose-Containing Fluids for Peritoneal Dialysis: Influence of Time and Temperature

To minimizethe development of cytotoxic breakdown products, high temperatures over short periods of time should be used to heat-sterilize PD fluids.

Chlorine resistance patterns of bacteria from two drinking water distribution systems.

  • H. RidgwayB. Olson
  • Biology, Environmental Science
    Applied and environmental microbiology
  • 1982
Bacteria from the chlorinated system were more resistant to both the combined and free forms of chlorine than those from the unchlorinated system, suggesting that there may be selection for more chlorine-tolerant microorganisms in chlorinated waters.

Comparative Research of Efficiency of Water Decontamination by UV Radiation of Cold Hollow Cathode Discharge Plasma Versus That of Low- and Medium-Pressure Mercury Lamps

In this paper, the results of experimental studies of peculiarities of Escherichia coli water suspension inactivation by ultraviolet radiation of hollow cathode discharge plasma in different gaseous

A new medium for the enumeration and subculture of bacteria from potable water

Results from parallel studies with spread, membrane filter, and pour plate procedures showed that R2A medium yielded significantly higher bacterial counts than did plate count agar, and the magnitude of the count was inversely proportional to the incubation temperature.