A sanitizer system has an ultraviolet (UV) lamp, a UV transparent tube and Venturis that that draw ozonated air from near the UV lamp and mix the ozonated air with water traveling through the UV transparent tube while UV light breaks down ozone in the UV transparent tube into free radicals and other ozone decomposition products. Additional ozone can be introduced into what after it passes through the UV transparent tube.

A method and a system for producing a change in a medium. The method places in a vicinity of the medium an energy modulation agent. The method applies an initiation energy to the medium. The initiation energy interacts with the energy modulation agent to directly or indirectly produce the change in the medium. The energy modulation agent has a normal predominant emission of radiation in a first wavelength range outside of a second wavelength range (WR2) known to produce the change, but under exposure to the applied initiation energy produces the change. The system includes an initiation energy source configured to apply an initiation energy to the medium to activate the energy modulation agent.

Disclosed is a sterilization apparatus including: a semiconductor UV (ultraviolet) light emitting diode; and a case including an upper section with an internal space and an entrance opening, a bottom face opposite to the entrance opening, and a lateral face connecting the bottom face and the upper section.

A photocatalytic reaction unit for removing dissolved metals from a wastewater stream, including a photocatalytic reaction vessel having an inlet and an outlet for providing passage of the wastewater stream into and out of the photocatalytic reaction vessel; a photocatalyst for mixing with the wastewater stream; and an ultraviolet light source for emitting ultraviolet light into the photocatalytic reaction vessel.

A portable liquid filtration device includes a portable housing, an inlet defined on the portable housing and oriented to receive liquid therethrough, an outlet defined on the portable housing and oriented to discharge liquid therethrough, and an ultraviolet (UV) chamber in downstream flow communication with the inlet. The UV chamber includes a UV lamp configured to irradiate the liquid with UV light. The device further includes a mounting assembly for coupling the UV chamber to the housing. The mounting device includes a set of rails coupled to the housing and defining a corresponding rail notch, and a clamp. The clamp includes a first grip arm at a first end of the clamp and a flange at a second end of the clamp. The first grip arm is shaped to secure the UV chamber to the clamp and the flange provides a friction fit between the clamp and the rails.

A power generating and water purifying system. The system includes a closed loop power generator, a closed loop heat exchanger, and a closed loop water purifier. Hot brine water vapor travels from a reactor to a turbine, which generates electricity. The hot brine water vapor is then cooled by the closed loop heat exchanger and travels back to the reactor. The electricity powers generators. The electricity further powers an ammonia pump and a coolant compressor of the closed loop heat exchanger. Dirty water enters through a water inlet and is chilled by the closed loop heat exchanger. The water is then directed to a hot water accumulator, in which the water is heated by the closed loop heat exchanger. The water is vaporized by a hot plate and a UV light source. The distilled water is then cooled in a cooling tower and delivered to water tower as purified water.

A method and a system for producing a change in a medium. The method places in a vicinity of the medium an energy modulation agent. The method applies an initiation energy to the medium. The initiation energy interacts with the energy modulation agent to directly or indirectly produce the change in the medium. The energy modulation agent has a normal predominant emission of radiation in a first wavelength range outside of a second wavelength range (WR2) known to produce the change, but under exposure to the applied initiation energy produces the change. The system includes an initiation energy source configured to apply an initiation energy to the medium to activate the energy modulation agent.

A process of dissolving into to-be-treated water a peroxodisulfate and metal ions other than ions of alkali metals is performed by pouring equipment. An ultraviolet irradiation apparatus performs a process of treating the to-be-treated water, having the peroxodisulfate and the metal ions other than ions of alkali metals dissolved therein, with ultraviolet rays. By performing UV treatment on the to-be-treated water having the peroxodisulfate and metal ions dissolved therein, the inventive method and system achieve improved TOC decomposing performance and thus can particularly decompose a urea component in an efficient manner. Further, the to-be-treated water may be treated with an ion-exchange resin at a subsequent stage in such a manner that organic acids contained in the to-be-treated water having been subjected to the UV treatment are adsorbed to the ion exchange-resin, with the advantageous result that the concentration of TOC present in the to-be-treated water can be reduced.

A filtering device having UV light, that includes shell body having a water passage chamber, UV light is disposed in the water passage chamber. A glass tube set is disposed in the water passage chamber around outer periphery of the UV light. The glass tube set includes a first glass tube and a second gas tube both disposed around the outer periphery of the UV light. The lower end of the first glass tube is connected to and acts in cooperation with the lower end of the water passage chamber. The upper end of the first glass tube is separated from the upper end wall of the water passage chamber. The second glass tube is located around the outer periphery of the first glass tube. The lower end of the second glass tube is separated from the lower end wall of the water passage chamber.

The present disclosure teaches a UV dosimeter comprising a UV-sensitive layer and a barrier that protects the UV-sensitive layer. The barrier is permeable to oxygen but impermeable to water and, thus, protects the UV-sensitive layer from water while allowing exposure of the UV-sensitive layer to oxygen. The UV-sensitive layer is accessible to both UV radiation and visible light. The UV-sensitive layer comprises a mixture of a semiconductor material, a UV-oxidizable dye, a sacrificial electron donor, and a matrix material. The semiconductor material has a band gap that corresponds to photon energy of the UV radiation. The dye has both an oxidation state and a reduction state. The oxidation state of the dye is visibly distinguishable from the reduction state of the dye. The sacrificial electron donor oxidizes when exposed to UV radiation. The matrix provides structural integrity to the mixture.