Abstract: The present disclosure relates to light emitting devices, systems and methods for use in animal nests, such as mink nests or piglet nests, for enhancing the formation of ND3 in animals and minimizing the microbial pressure in the animal nest, while providing the animals with an improved resting condition. A light emitting device comprises at least one UVB light source, wherein the light emitting device is configured such that UV light below 285 nm is not emitted from the device, visible light between 380 and 750 nm is not emitted from the device, and light in a wavelength interval of 290 nm-315 nm is emitted from the device.

Abstract: The invention regards an apparatus for promoting D-vitamin production in a living organism, comprising at least one lamp assembly, said at least one lamp assembly is adapted to emit polychromatic light, wherein the polychromatic light at least emulates natural light and UV light at wavelengths between 270 nm and 315 nm.

Abstract: The invention regards an Apparatus for promoting D-vitamin production in a living organism, comprising at least one lamp assembly, said at least one lamp assembly is adapted to emit light, wherein the light at least emulates natural or IR light and UV light at wavelengths between 270 nm and 315 nm, wherein the at least one lamp assembly comprises a plurality of LEDs.

Abstract: The invention regards an apparatus for promoting D-vitamin production in a living organism, comprising at least one lamp assembly, said at least one lamp assembly is adapted to emit polychromatic light, wherein the polychromatic light at least emulates natural light and UV light at wavelengths between 270 nm and 315 nm.

Abstract: The invention relates to a filter unit for purification of impure water, which could be seawater intended for ballast water, pool water, waste water or the like. The purification is performed by means of filter modules comprising filter means with dead end filter elements of a sintered material, and the filter unit facilitates alternating backwashing of the filter means at the same time as the filter unit may perform filtration of the impure water. The invention likewise relates to use of a dead end filter element in a de-gassing version, the filter element comprising a top end, a bottom end and a plurality of substantially parallel arranged channels with blockings in different ends.

Abstract: The invention relates to a filter unit for purification of impure water, which could be seawater intended for ballast water, pool water, waste water or the like. The purification is performed by means of filter modules comprising filter means with dead end filter elements of a sintered material, and the filter unit facilitates alternating backwashing of the filter means at the same time as the filter unit may perform filtration of the impure water. The invention likewise relates to use of a dead end filter element in a de-gassing version, the filter element comprising a top end, a bottom end and a plurality of substantially parallel arranged channels with blockings in different ends.

Abstract: An apparatus for purifying contaminated water by photochemical oxidation has at least a subflow of water that is directed through a flow channel in which the water is irradiated with UV electromagnetic radiation from at least one UV lamp assembly. The UV lamp assembly includes a high-pressure UV halogen lamp, which is mounted generally parallel with the flow direction in the channel. A method of irradiating the water flow with UV radiation includes using the at least one UV halogen high-pressure lamp assembly, which has energy intensive wave lengths in the range of 150 nm to 260 nm, preferably in the range of 160 nm to 220 nm, and most preferably in the range of 192 nm to 205 nm.

Abstract: The present invention concerns a method and a system for purifying water from a basin, in particular a swimming pool (1), by circulating a water flow (7) through a filtration system by pumping means (10), whereby at least a sub-flow (28) of the water filtrated in first filtration means (9) and then forwarded to secod filtration means (29) of the filtration system and being subjected to a photochemical treatment in a UV radiation system (40) before returned to the basin, wherein the water flow passing through the first filtration means (9) is filtered in membrane filter means (29), where at least a sub-flow (39) of the water is passed through a membrane filtrated means (29) for e.g. nanofiltration and that at least a partial flow (39) of this membrane filtrated water is irradiated with UV electromagnetic radiation. A system according to the invention is relatively compact due to the avoidance of sand filters.

Abstract: The present invention concerns an apparatus for purifying contaminated water by photochemical oxidation, wherein at least a sub-flow of water is directed through a flow channel wherein the water is irradiated with UV electromagnetic radiation from at least one UV lamp assembly, wherein said at least one UV lamp assembly includes a high-pressure UV halogen lamp which is mounted generally parallel with the flow direction in the channel. Moreover, a method is also provided, whereby the water flow is radiated with UV radiation by at least on UV halogen high-pressure lamp assembly, which is energy intensive wave lengths in the range of 150 nm to 260 nm, preferably in the range of 160 nm to 220 nm, and most preferably in the range of 192 nm to 205 nm.

Abstract: A device for light intensity measurement of the electromagnetic radiation from a UV lamp in a container including light guides and respective photodetectors. The light guides comprise two dosed light guides arranged in parallel with the lamp, preferably in the entire length, and two differently dosed edge glass filters enclosing each of the light guides, while a photodetector is positioned at one end of each of the light guides. The device allows measurement of predefined wavelengths of emitted electromagnetic radiation along the entire lamp. The device relates to a reaction container with UV lamps and intensity sensor, adapted for disinfection or photochemical treatment of flowing water.

Abstract: According to a method and a system for purifying bathing water for a swimming pool (1), water is passed through a filter (2) for filtration of the water. A subflow (6) of the filtered water on the downstream side of the filter is passed through a UV system (3) for photochemical treatment. A second subflow (7) of photochemically treated water is withdrawn from the first subflow (6) for nanofiltration or reverse osmosis treatment in a membrane filter device (4). The invention makes it possible to remove carcinogenic substances, such as THM and AOX from the water. A method according to the invention may also be used for removing biocides, pesticides and peroxides, in order to prepare water for drinking.

Abstract: A lamp device comprises a UV intermediate pressure lamp tube (1), arranged in an outer globe (2) mounted in a socket (4). Sealing means (5, 6, 7, 8, 9) enclose the outer globe (2) in order to ensure mutual vacuum-tight mounting of socket (4) and outer globe (2). The lamp device is suitable for application in a UV system for photochemical water purification. A control system comprises device for temperature measurement of an inactive gas in the outer globe and device for regulating the tube voltage of the lamp tube. Controlling the tube voltage of the lamp tube increases service life of the lamp and ensures uniformity in the electromagnetic radiation (UV light) emitted by the lamp. The UV lamp is replaceable in the remaining part of the lamp device.

Abstract: By a method and an apparatus for cleaning water in a swimming pool, the water is circulated successively through a plurality of flow chambers divided by partitions. In the front chamber bar-shaped heating bodies are located transverse to the flow direction of the water, and in the succeeding chamber ultraviolet radiation lamps are located transverse to the flow direction, said lamps radiating light at .lambda.>300 nm. In a last chamber ultraviolet radiation lamps are located which radiate light at .lambda.<300 nm. When the water passes through the container, skin squames and the like organisms collect on the heating bodies, whereas the ultraviolet radiation lamps in the chamber ensure such a disinfection that only a quite small amount of fresh water need to be supplied to the swimming pool. The ultraviolet radiation lamps serve to kill the bacteria resistant to chlorine.