A sterilizer may include: a first pipe having an inner wall with a light reflecting property; a second pipe disposed in the first pipe so as to pass fluid therethrough and formed of a light transmitting material; and a plurality of UV LEDs arranged on the inner wall of the first pipe and configured to irradiate sterilization UV light onto the fluid.

An apparatus for sterilizing a liquid comprises a container having an inlet, an outlet and an interior with an outer wall which defines a first section and a second section, the first section being configured to receive the liquid. A rotatable arrangement set up in the interior with a surface is furthermore provided, the rotatable arrangement being configured in such a way that during a rotation the surface moves from the first section into the second section and from there back into the first section. The apparatus furthermore comprises at least one radiation source which is adapted to emit radiation in the ultraviolet wavelength range.

A disinfection apparatus and method is provided for disinfecting a fluid. The apparatus elements define three internal container volumes. Fluid is introduced into an entry volume where its flow is conditioned to reduce splash and slow the fluid flow. The fluid is then channeled into a disinfection volume where a disinfection unit delivers a disinfection agent to the fluid. Finally, the fluid exits the apparatus through an exit volume. In one aspect, a sink-trap is disclosed in which wastewater liquid contacts a pair of diverters. The diverters have conditioned contact surfaces that slows and spreads the liquid flow and reduces liquid splash. The wastewater then passes through a UV chamber in which it is disinfected. The liquid then exits the sink-trap. Advanced self-cleaning apparatus are additionally disclosed to clean and disinfect the sink-trap and trapped wastewater. The entire apparatus operates under computer control.

A collimation type disinfection and water purification device includes a reactor cavity. The reactor cavity is in a linear shape extending in a front side direction and a rear side direction. A water inlet and a water outlet are respectively formed in side walls of a front side and a rear side of the reactor cavity. Ultraviolet (UV) modules are arranged at end parts of the reactor cavity. The UV module includes a radiation component and a Total Internal Reflection (TIR) lens. The radiated UV light can enter the reactor cavity in a collimation manner by using a design that the radiation component is matched with the TIR lens, which improves the disinfection efficiency.

Described are light generating devices employing ultraviolet (UV) light emitting diodes and one or more UV active materials, such as UV reflective materials, UV scattering materials, and UV transparent materials. A UV light generation system, may include a plurality of UV light emitting diodes arranged across a surface having a diffuse UV reflective layer. The UV light generation system may be arranged to enclose a fluid pathway or may be arranged as a liner of a container or vessel for use in disinfecting, purifying, or sterilizing fluid, particles or objects in the fluid pathway, container, or vessel by exposure of the fluid, particles or objects to UV light generated by the UV light emitting diodes.

A plant cultivation device may include a cabinet forming a space in which plants are cultivated: a door connected to the cabinet to open and close the space; at least one bed disposed in the space; at least one light assembly that irradiates light onto the at least one bed; a tank configured to store a fluid; a fluid supply module configured to supply the fluid to the at least one bed; and a sterilizer positioned outside of the tank and configured to sterilize the fluid within the tank.

Solid-state lighting devices including light-emitting diodes (LEDs), and more particularly integrated warning structures for ultraviolet LED packages are disclosed. Integrated warning structures may include passive structures, such as lumiphoric material regions, that are arranged within LED packages to receive a portion of ultraviolet light from an LED chip within the LED package and provide a small amount of wavelength-converted light. Such wavelength-converted light may serve as indication that ultraviolet light is being emitted. Exemplary lumiphoric material regions may form one or more discrete regions within LED packages and may provide such wavelength-converted light without substantial impact on color purity of the LED packages. Accordingly, LED packages may provide integrated warning emissions that may serve to indicate the presence of ultraviolet emissions and/or reduce human exposure to such ultraviolet emissions.

A fluid sterilization module includes an inner cylinder forming a processing flow path extending in a longitudinal direction, a first chamber communicating with the processing flow path via an opening on one end side of the inner cylinder, an inflow portion allowing an object to flow in the first chamber, an outflow portion allowing the object having passed through the processing flow path to flow out from an other end side of the inner cylinder, and a light emitting element facing an opening on the other end side of the processing flow path and irradiating the object passing through the processing flow path with ultraviolet light along the longitudinal direction. The first chamber has an inner volume equal to or more than ⅔ of the cube of an equivalent inner diameter of the processing flow path and equal to or less than 3 times of inner volume of the processing flow path.

Methods and systems for the purification of an aqueous solution comprising a photocatalyst employed as an anode and a cathode in communication with an electrolyte to achieve a current flow wherein a charge is applied between the cathode and the photocatalytic excited anode a corresponding increase in electron-hole pairs occurs.

An UV-C device may include several UV-C light sources (e.g., UV-C LEDs) and such UV-C LEDs may have UV-C reflecting structures arranged to direct UV-C in a particular direction and at a particular size and shape. Doing so may, for example, increase the UV-C in a particular direction or working area. A UV-C generating device may be utilized in an air stream, such as an air duct, to sterilize air from that air stream. Multiple UV-C inactivation devices may be coupled in series and placed into a single housing for in order to increase the efficacy of the UV-C inactivation device. The inlet of the device may draw air using an inlet module attachment (e.g., a hood with one or more than one inlet hood) and may output air using an outlet module attachment (e.g., a duct to deliver air to an outflow air duct). Computational fluid dynamic software may be provided where UV-C inactivation devices may be positioned (e.g., manually or autonomously by an adaptive algorithm) to determine impact on airflow against various pathogens (e.g., Staphylococcus and/or SARS-CoV-2).