MINIATURE SYSTEM FOR REMOVAL OF DISINFECTION BYPRODUCTS

现行法律规定，地表水和地下水市政供水设施分别在2001年和2003年之前控制成品水中有毒卤化消毒副产物(DBPs)的形成。然而，在供水管道中提供残留杀生剂似乎没有氯的替代品。目前在工厂一级可用于去除DBP的处理技术不能提供实用、经济或后勤解决方案。减少接触二溴联苯的一个实际且具有成本效益的方法是在使用地点对水进行处理。拟议工作的目的是开发一种微型、使用点(POU)高级氧化光催化净水器。与其他POU技术(如活性碳过滤器、反渗透)相比，光催化技术具有诱人的优点，因为(I)它不会增加任何对水有害的东西，(Ii)不需要常规的更换或维修；(Iii)不会为危险的细菌生长提供避风港。然而，由于几个技术障碍，小型光催化系统还没有商业化，包括(I)高效光催化剂，(Ii)用于光活化的光穿透；(Iii)向光反应器输送氧气。最近的创新发展将克服这些限制，允许制造一种“水槽下”的自给自足、低维护系统来去除DPB。拟议的商业应用：新型高级氧化光催化工艺将在许多需要破坏有机化合物的领域找到商业应用，如氯化或副产物、合成有机化合物、表面活性剂、有毒溶剂、染料、味道和气味化合物以及挥发性有机化合物(VOCs)。这些实体包括受污染的农村(井水)供水家庭、城市水处理厂、化学加工工业、农药制造商、纺织业、半导体工业，以及在需要处理的废水中生产有机化学品的任何设施。

Current law mandates that surface and groundwater municipal water utilities control the formation of toxic, halogenated disinfection by products (DBPs) in finished water by years 2001 and 2003, respectively. However, there appears to be no substitute for chlorine for providing a residual biocide in water delivery lines. Current treatment technologies available for DBP removal at the plant level do not provide a practical, economic or logistical solution. A practical and cost effective approach for reducing exposure to DBPs is the treatment of water at its point-of-use. The aim of the proposed work is to develop a miniature, point-of-use (POU), advanced oxidation photocatalytic water cleaning apparatus. Photocatalysis provides attractive benefits over other POU technologies (i. e., activated carbon filters, reverse osmosis) because (i) it adds nothing harmful to the water, (ii) does not require routine replacement or service; and (iii) does not provide a harbor for dangerous bacterial growth. However, miniature photocatalytic systems are not commercially available due to several technological barriers, including (i) efficient photocatalysts, (ii) light penetration for photoactivation of the catalyst; (iii) oxygen delivery into the photoreactor. Recent innovative developments will overcome these limitations, allowing the fabrication of an "under the sink" self-contained, low maintenance system for DPB removal. PROPOSED COMMERCIAL APPLICATIONS: The novel advanced oxidation photocatalytic process will find commercial applications in many areas where destruction of organic compounds, such as chlorination or bromination by products, synthetic organic compounds, surfactants, toxic solvents, dyes, taste and odor compounds, and volatile organic compounds (VOCs), is needed. These entities include contaminated rural (well) water supplied homes, municipal water treatment plants, chemical processing industries, pesticides manufacturers, textile industries, semiconductor industry, and any facility which produces organic chemicals in a waste water stream that requires treatment.