SBIR Phase I: UV LED Based Water/Wastewater Point-of-Use Purification System

该小型企业创新研究(SBIR)第一阶段项目建议开发基于紫外线发光二极管(LED)的使用点水和废水灭菌反应器。紫外线辐射已被证明是饮用水和废水中微生物净化/杀菌最有效的方法之一。水处理系统的重要组成部分是微生物消毒单元，用于去除细菌、病毒和原生动物包囊。解决这个问题的传统方法是使用化学物质，如氯和碘。然而，化学工艺也有不可避免的缺点：消毒副产物(DBP)的存在，需要控制pH值来进行有效的消毒，以及缺乏对特定微生物的消毒，如溶解组织内阿米巴和蓝氏贾第鞭毛虫。目前基于紫外线的净化/灭菌系统依赖于低压和中压汞(Hg)灯，这些灯分别发出单色254 nm辐射或从220 nm到370 nm的广谱辐射。建议开发基于UV发光二极管(LED)的小型、廉价、便携、使用点的净化/灭菌系统。在这一第一阶段下将开展的工作所涉及的主要细分市场是用于使用点应用的水/废水的杀菌消毒和净化。紫外线净化技术可以有效地对抗水/废水处理系统中的所有微生物。深紫外光LED代表了一种新型光源，其输入功率要求和批量生产成本远低于当前任何紫外光辐射源。

This Small Business Innovation Research (SBIR) Phase I project proposes to develop ultraviolet light emitting diode (LED) based point-of-use water and wastewater sterilization reactors. UV radiation has been shown to be one of the most effective methods for purification/sterilization of microbiological organisms in drinking water and wastewater. A significant part of a water treatment system is a microbiological disinfection unit for removal of bacteria, viral and protozoan cyst. The traditional approach to the problem is use of chemicals, such as chlorine and iodine. Nevertheless, there are unavoidable drawbacks of chemical processes: presence of disinfection by-products (DBP), need of pH control for effective disinfection and lack of disinfection for specific microorganisms such as Entaemoeba histolytica and Giardia lamblia. Current UV-based purification/sterilization systems rely on low and medium pressure mercury (Hg) containing lamps that emit either monochromatic 254 nm radiation or broad spectrum radiation ranging from 220 nm to 370 nm, respectively. It is proposed to develop small, inexpensive, portable, point-of-use UV light emitting diode (LED) based purification/sterilization systems. The primary market segment addressed through the work that will be performed under this Phase I effort is the germicidal sterilization and purification of water/wastewater for point-of-use applications. Ultraviolet purification technology can be an effective means to fight ALL microorganisms in water/wastewater treatment systems. Deep UV LEDs represent a new light source with input power requirements and volume production costs much lower than any current UV radiation source.