This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Ultraviolet Light Emitting Diodes for Disinfection of Spacecraft Potable Water Systems
Technical Paper
2009-01-2508
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
This report describes proof-of-concept testing of a commercial-off-the-shelf deep ultraviolet LED for future application as a point-of-use or residual disinfection device for spacecraft potable water systems. The electro-optical performance and disinfection efficacy of a 0.5 mW 265nm UV-C LED (UVTOP, Sensor Electronic Technology, Inc., Columbia, SC) was measured in both static and flow environments against five challenge microorganisms inoculated into potable water at an initial concentration ≥ 108 cells per milliliter. The germicidal irradiation from a single UV-C LED array was sufficient to effect > 4-log kill (> 99.99%) of the challenge bacterial population in < 60 minutes contact time.
Authors
Citation
Birmele, M., McCoy, L., Soler, R., and Roberts, M., "Ultraviolet Light Emitting Diodes for Disinfection of Spacecraft Potable Water Systems," SAE Technical Paper 2009-01-2508, 2009, https://doi.org/10.4271/2009-01-2508.Also In
References
- Giese, N. Darby, J. 2000 Sensitivity of microorganisms to different wavelengths of UV light: implication on modeling of medium pressure UV systems Water Research 34 16 4007 4013
- Hamamoto, A., Mori, M. Takahashi, A. Nakaya Y. Kinouchi. Y. 2007 New water disinfection system using UVA light-emitting diodes J. of Applied Microbiology 103 2291 2298
- Hijnen, W.A.M., Beerendonk, E.F., Medema, G.J., 2006 Inactivation credit of UV radiation for viruses, bacteria and protozoan (oo)cysts in water: a review Water Research 40 1 3 22
- Khan. A. 2006 A bug-beating diode Nature 441 299
- NASA. “Constellation Program Human-Systems Integration Requirements” CxP 70024 Baseline 2007
- NASA. “Man-Systems Integration Standards” Revision B, July 1995
- Naunovic, Z., Lim, S. Blatchley E.R. III 2008 Investigation of microbial inactivation efficiency of a UV disinfection system employing an excimer lamp Water Research 42 4838 4846
- Vermeulen, N., Keeler, W.J. Nandakumar, K. Leung. K.T. 2008 The bactericidal effect of ultraviolet and visible light on Escherichia coli. Biotechnology and Bioengineering, 99 550 556