Abstract: An air treatment system may include a housing including at least one wall defining a nozzle passage having a vent adjacent an upstream portion of the at least one wall. The air treatment system may also include a photocatalytic reaction chamber including a plurality of photocatalytic media and a light source disposed to illuminate at least a portion of the photocatalytic media for producing a photocatalytic reaction generating a plurality of hydroxyl radicals. The air treatment system may also include a blower fluidly coupled with the photocatalytic reaction chamber for conveying air through the photocatalytic reaction chamber and directing the air through the vent and along at least a portion of the at least one wall.

Abstract: A photocatalytic air treatment system, including apparatuses and methods, for killing and/or mineralizing bacteria, viruses, mold, fungi, spores, mycotoxins, allergens, and other similar microorganisms or agents, and for oxidizing volatile organic compounds (VOCs). The system comprises one or more reactor beds configured in one or more stages with each reactor bed including a plurality of photocatalyst coated media substantially surrounding a plurality of sheathed ultraviolet light sources that may be arranged in a plurality of configurations. Adjacent ultraviolet light sources are positioned so as to create killing zones of photocatalyst coated media therebetween that are irradiated with ultraviolet light from multiple sources and in which an increased number of hydroxyl radicals are present. The photocatalyst generally comprises titanium dioxide, but may include one or more enhancers. The media is formed from or is coated with a material that induces the photocatalyst to form a nano-particle structure.