A fluid sterilization device includes: a housing formed with a processing passage for sterilizing a fluid passing through the processing passage; a light source that radiates ultraviolet toward the processing passage; and a transmissive member provided between the light source and the processing passage and transmitting the ultraviolet light radiated by the light source. The transmissive member is a one-piece component including: a focusing part that focuses the ultraviolet light radiated by the light source toward the processing passage by refracting or reflecting the ultraviolet light; an exit part that guides the ultraviolet light transmitted through the focusing part toward the processing passage, and a supported part formed on an outer circumference of the exit part to be contiguous with the exit part, and supported by the housing. The exit part is exposed to the processing passage.

Systems and methods for applying light to an environment are provided. A system may include an elongate first body having a first side wall, a second side wall opposite the first side wall, and a bottom wall. The first body may define a lengthwise channel between the first side wall and the second side wall. The first body may have a first groove disposed along an inner surface of the first side wall, a second groove disposed along an inner surface of the second side wall, and a cover which may be coupled to the first body via the first groove and the second groove. The first body and the cover may collectively enclose at least a portion of the channel. The system may include an LED disposed within the channel.

Systems and methods for applying light to an environment are provided. A system may include a plurality of light emitting diode (LED) arrays. Each LED array may include one or more LEDs that are configured to be powered on and off together. The system may be configured such that, during a first timeslot, a pulsed power input is applied to a first LED array, and during a second timeslot, the pulsed power input is applied to the second LED array.

A water treatment device includes: a dual-pipe structure unit including an outer pipe, an inner pipe provided in the outer pipe, and a prevention member provided between the outer pipe and the inner pipe; and a light source unit radiating ultraviolet light in the axial direction to irradiate water subject to treatment flowing in the inner pipe. The inner pipe includes an opposing end facing the light source unit across a gap and an inflow end positioned opposite to the opposing end. The outer pipe includes an outflow port provided on an outer circumferential surface of the outer pipe. The water subject to treatment flowing out of the inner pipe via the gap flows out from the outflow port.

A portable liquid filtration device includes a GPS tracking unit, a portable housing, an inlet configured to receive non-potable water, and an ozone chamber positioned within the portable housing. The ozone chamber is configured to generate an ozone gas from received air. The device also includes a filtration duct positioned within the portable housing and downstream from the inlet. The filtration duct includes at least one advanced oxidation (AO) chamber configured to mix the received water with the ozone gas, and at least one ultraviolet (UV) chamber downstream from the at least one AO chamber and including a UV lamp positioned adjacent the water within the filtration duct. The device further includes an outlet positioned on the portable housing and downstream from the filtration duct. The filtration duct is operable to output at least 400 liters per hour of the received water from the outlet as potable water.

An apparatus for the treatment of water includes an elongated housing having a first end and a second end. The first end has a water inlet and the second end has a water outlet. An elongated ultraviolet radiation source with a sleeve is concentrically located within the elongated housing. The elongated ultraviolet radiation source has, at its first end, electrical connections, which extend through the second end of the housing and have a second free end held in a support element. The support element includes a supporting structure containing a ring element and from thereon radially inwardly running arms. The arms are designed in such a way that during assembly the arms are resiliently deformed and wherein, if assembled, the arms are pressed against the sleeve, so that the free end of the ultraviolet radiation source is held by the arms in a resilient manner.

Disinfection apparatus having submersible disinfection devices for disinfecting fluid. The disinfection apparatus includes: a pipe having one or more linear segments; one or more disinfection devices installed on the pipe, each of the one or more disinfection devices generating light for disinfecting fluid in a linear segment of the pipe; and a controller electrically coupled to the one or more disinfection devices and controlling the one or more disinfection devices. Another embodiment of the disinfecting apparatus includes; side and bottom walls and a lid that define an enclosed chamber; an inlet and outlet for communicating fluid to the enclosed chamber; a plurality of disinfection devices disposed on the side wall, each of the plurality of disinfection devices generating light for disinfecting fluid inside the enclosed chamber; and a controller electrically coupled to the plurality of disinfection devices and controlling the plurality of disinfection devices.

A fluid treatment system includes a reactor chamber fluidly coupled with a fluid inlet and a fluid outlet. The reactor chamber is defined by one or more chamber walls. The system includes a UV LED, and a light pipe. The light pipe extends into the reactor chamber through at least one of the chamber walls. The light pipe has a proximal end disposed outside of the reactor chamber. The proximal end is coupled with the UV LED to transmit UV light into the reactor chamber through the light pipe. To that end, the light pipe also has a distal end, opposite the proximal end, that is disposed within an interior volume of the reactor chamber. The light pipe includes a central section disposed between the proximal end and the distal end. The central section is configured to transmit the UV light from UV LED to the distal end.

Provided is a flowing-water sterilization system that includes a flow channel for passing seawater to be sterilized, and a light source emitting ultraviolet light to irradiate the seawater passing through the flow channel, wherein the light source includes a light-emitting diode that emits light not including infrared light. The light-emitting diode may emit ultraviolet light that has a wavelength of not less than 250 nm and not more than 350 nm and does not include light with a wavelength of not more than 200 nm. The system may further include a cooling unit for cooling the light source.

Provided is a flowing-water sterilization system that includes a flow channel for passing seawater to be sterilized, and a light source emitting ultraviolet light to irradiate the seawater passing through the flow channel, wherein the light source includes a light-emitting diode that emits light not including infrared light. The light-emitting diode may emit ultraviolet light that has a wavelength of not less than 250 nm and not more than 350 nm and does not include light with a wavelength of not more than 200 nm. The system may further include a cooling unit for cooling the light source.