Department of Civil, Environmental, and Architectural Engineering, University of Colorado at Boulder, Boulder, CO 80304, USA.
J Water Health. 2010 Sep;8(3):479-86. doi: 10.2166/wh.2010.124. Epub 2010 Mar 9.
Ultraviolet (UV) irradiation is a common disinfection option for water treatment in the developed world. There are a few systems installed in developing countries for point-of-use treatment, but the low-pressure mercury lamps currently used as the UV irradiation source have a number of sustainability issues including a fragile envelope, a lifetime of approximately one year, and they contain mercury. UV light emitting diodes (LEDs) may offer solutions to many of the sustainability issues presented by current UV systems. LEDs are small, efficient, have long lifetimes, and do not contain mercury. Germicidal UV LEDs emitting at 265 nm were evaluated for inactivation of E. coli in water and compared to conventional low-pressure UV lamps. Both systems provided an equivalent level of treatment. A UV-LED prototype was developed and evaluated as a proof-of-concept of this technology for a point-of-use disinfection option, and the economics of UV-LEDs were evaluated.
紫外线（UV）照射是发达国家水处理中常用的消毒方法。发展中国家也有一些用于现场处理的系统，但目前用作紫外线照射源的低压汞灯存在一些可持续性问题，包括易碎的外壳、大约一年的使用寿命以及含有汞。紫外线发光二极管（LED）可能为当前紫外线系统存在的许多可持续性问题提供解决方案。LED 体积小、效率高、寿命长且不含汞。评估了在 265nm 处发射的杀菌紫外线 LED 对水中大肠杆菌的灭活效果，并与传统的低压紫外线灯进行了比较。两种系统都提供了同等水平的处理。开发了一个紫外线 LED 原型，并将其作为现场消毒选择的这项技术的概念验证进行了评估，还评估了紫外线 LED 的经济性。
