27 results about "Far ultraviolet" patented technology

The invention discloses a method for synchronously removing bromate and new pollutants in water by using a far ultraviolet light / bromate process. The method comprises the following steps: radiating a water body containing the bromate and the new pollutants by using far ultraviolet light; the bromate can be efficiently degraded by utilizing an far ultraviolet light source with a high molar absorption coefficient, so that new pollutants can be further degraded by generated oxidizing free radicals and reducing species, and the bromate and the new pollutants can be synchronously and efficiently removed. Under the condition of 800 mJ cm <-2 >, the degradation rate of bromate can reach 54%; under the condition of 200 mJ cm <-2 >, the removal rate of new pollutants can reach 90% or above; according to the method, collaborative purification of the two pollutants is achieved, compared with removal of new pollutants by independently using far ultraviolet light, the far ultraviolet light / bromate technology is higher in new pollutant removal efficiency, and the method has the advantages of being efficient, environmentally friendly and free of chemicals; according to the method, the bromate-containing water body generated after ozone or ultraviolet / chlorine disinfection of a water plant can be utilized in situ, so that the water treatment cost can be saved.

The application discloses a thermoelectric pile structure for calibrating a far ultraviolet ultraviolet detector based on MEMS, which comprises a silicon substrate, a support layer, an absorption layer, a thermocouple pair, aluminum wires, aluminum electrodes and a single crystal silicon material structure on the silicon substrate. The double-layer thermocouple stacking structure is adopted to improve the device duty ratio, more thermocouple pairs can be laid in the case of keeping the size of the one-layer structure unchanged, and the response rate of the detector is improved. The circular structure conforms to the distribution trend that the temperature is radially diffused from the center of the absorption layer to the periphery in a decreasing manner, the hot end of the thermocouple pair can be closer to the area with higher temperature, the temperature of the hot end of the thermocouple pair is more uniform, and the response rate of the detector is improved. The radiant energy of the far ultraviolet ultraviolet radiation source is converted into an output thermoelectric electromotive force, a mathematical model of Fourier's law and the Seebeck effect is established for calculation, and the heat flux density of the far ultraviolet ultraviolet radiation source is measured.

The invention discloses a far ultraviolet micro-LED photocatalyst monolithic integrated chip and a preparation method of the far ultraviolet micro-LED photocatalyst monolithic integrated chip. According to the chip, an AlGaN-based micro-LED array with the emission peak position of 220-230 nm is adopted as a far ultraviolet light source, a conformal composite layer structure with optical shaping and photocatalysis dual functions is integrated on the light emitting face of the AlGaN-based micro-LED array in a monolithic mode, and a composite layer is composed of a high-transmittance framework layer and a porous catalytic skin layer; the catalytic skin layer conformally deposits a porous membrane with the thickness of 50-300 nm on the surface of the lens, the aperture is 10-200 nm, the porosity is 20-60%, and degradation of organic pollutants and inactivation of microorganisms in air are achieved under the wave band of 220-230 nm. And a transition layer with the thickness of 50-200 nm is arranged between the light emitting surface of the chip and the composite layer, so that the adhesive force is improved and the thermal stress is relieved. The device is compact in structure, low in energy consumption, free of mercury, environmentally friendly and suitable for the fields of far ultraviolet disinfection, air purification, healthy illumination in closed space and the like.

The onium salt can be used for a chemically amplified resist composition. The resist composition exhibits a high sensitivity, high resolution, having improved lithography properties such as LWR of line patterns, CDU of hole patterns, exposure latitude (EL), and depth of focus (DOF), and capable of suppressing collapse of resist patterns in photolithography using high-energy radiation such as a far ultraviolet ray, EUV, or an electron beam (EB) independent of whether it is of positive or negative tone, and to provide a pattern forming process. The onium salt having the formula (1).

The invention discloses a breeding wastewater purification method and system based on far ultraviolet / micro-nano ozone combination, and relates to the technical field of wastewater purification treatment. The breeding wastewater purification method comprises the following steps: introducing ozone and first wastewater into the micro-nano bubble generation unit to generate fluid containing ozone micro-nano bubbles; the fluid containing the ozone micro-nano bubbles and second wastewater are input into a multi-phase reactor to be evenly mixed, far ultraviolet light is adopted in the multi-phase reactor to radiate the fluid, the wavelength of the far ultraviolet light comprises 222nm, and discharging is conducted to obtain purified water. According to the invention, an efficient gas-liquid mass transfer interface and an enhanced photochemical oxidation process are constructed, so that compound pollutants such as antibiotics, pathogenic microorganisms and disinfection byproducts can be efficiently and safely removed, and the generation of toxic byproducts is effectively controlled, thereby ensuring the safe, green and sustainable development of the breeding industry.

Systems, methods, and devices for the generation and execution of an environmental protection plan may be deployed to aid with a reduction of, for example, air-borne and / or surface pathogens within an environment. The environmental protection plan may use one or more sanitizing devices to emit sanitizing radiation (e.g., far UVC light) into the environment to kill or otherwise neutralize pathogens such as viruses and bacteria within the environment. At times, the environmental protection plan may be responsive to one or more aspects (size, objects contained therein) of the environment, a use for the environment, a modeled and / or actual pathogen load within the environment, desired levels of pathogen reduction within the environment, and / or human and / or animal safety limits for the sanitizing radiation.

The present invention relates to a pest repelling, killing, and / or damaging UV light-emitting device (100) comprising—a housing (200),—a control element (110) configured to output a control signal (111), and—a UV light-emitting element (115) configured to emit, in response to the control signal (111), far-UVC light (125) thereby repelling, killing, and / or damaging one or more pests, e.g. or in particular mosquitos, irradiated by the emitted far-UVC light (125).

A system for eradicating pathogens is disclosed. A lamp is provided that emits a far-ultraviolet C (far-UVC) light generates an irradiation zone. A biometric sensor determines whether an individual is present in the irradiation zone. The biometric sensor signals a processor to determine whether the individual has been exposed to a threshold limit of far-UVC light. The processor determines whether the time an individual has been in the irradiation zone exceeds a threshold limit. If the individual has been in the irradiation zone a period of time exceeds the threshold, the lamp is deactivated. A pathogen detection sensor provides user feedback of the existence pathogens and signals the processor to terminate irradiation or provide user feedback to terminate irradiation. The system and method are included in a passenger compartment of a vehicle to eradicate pathogens on surfaces and aerosol. Threshold limits allow eradication while the vehicle is occupied.

The invention relates to the technical field of wastewater treatment, in particular to a method for degrading and detoxifying unsymmetrical dimethylhydrazine wastewater by activating persulfate through far ultraviolet, and aims to solve the problems of low free radical yield, limited UDMH mineralization and detoxification effects, serious secondary pollution and the like in a traditional advanced oxidation process. On the basis that 222nm far ultraviolet light (UV222) is adopted as an ultraviolet light source to activate persulfate and a UV222 / PS system is formed to degrade UDMH, an alkali activator is added into a reaction system to construct a'light-alkali-oxidant 'ternary synergistic system, the number of active free radicals generated by persulfate activation is increased, further mineralization and deep degradation of UDMH are promoted, and the UDMH degradation efficiency is improved. The degradation reaction is carried out at normal temperature and normal pressure, the reaction condition is mild, a metal catalyst does not need to be added, the whole degradation process is green and pollution-free, the degraded water body is safe and non-toxic, the reaction process is safe and reliable, and green and efficient degradation and detoxification of UDMH are realized.

To provide a method and a facility for producing a steel sheet by which gas adsorbed on the surface of the steel sheet carried into a vacuum tank can be removed without heating and / or cooling the steel sheet in the production facility having the vacuum tank through which the steel sheet is passed.SOLUTION: In a method for producing a steel sheet, in a production line having a vacuum tank through which a steel sheet is passed, the steel sheet is irradiated with far ultraviolet rays having wavelengths below 200 nm at integrated irradiance of 150 mJ / cm2 or more on the upstream side of the vacuum tank. A facility for producing a steel sheet includes the vacuum tank through which a steel sheet passes, and a far ultraviolet irradiation device that is installed upstream of the vacuum tank and irradiates the steel sheet with far ultraviolet rays.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of water treatment, and particularly relates to a method for deeply treating organic pollutants in lignite gasification biochemical wastewater by using a far ultraviolet light activated oxidant. The method comprises the following steps: mixing lignite gasification biochemical wastewater with an oxidizing agent, and carrying out photocatalytic degradation reaction on the obtained reaction liquid to obtain effluent; the oxidizing agent comprises one or more of H2O2, persulfate and periodate; the photocatalytic degradation reaction is carried out under far ultraviolet light. The method provided by the invention can effectively degrade organic pollutants in lignite gasification biochemical wastewater, especially refractory organic pollutants, the removal rate of organic matters is greater than or equal to 90%, up-to-standard discharge can be realized, the treatment period is shortened (the total reaction time is 2-4 hours), the environmental adaptability is strong, and the method is suitable for industrial production. The problems that in a traditional Fenton method, the agent adding amount is large, the wastewater pH value adaptability is poor, the treatment efficiency of low-concentration refractory organic matter is unstable, the process reaction period is long, and the operation and maintenance cost is high are solved.

Systems, methods, and devices for the generation and execution of an environmental protection plan may be deployed to aid with a reduction of, for example, air-borne and / or surface pathogens within an environment. The environmental protection plan may use one or more sanitizing devices to emit sanitizing radiation (e.g., far UVC light) into the environment to kill or otherwise neutralize pathogens such as viruses and bacteria within the environment. At times, the environmental protection plan may be responsive to one or more aspects (size, objects contained therein) of the environment, a use for the environment, a modeled and / or actual pathogen load within the environment, desired levels of pathogen reduction within the environment, and / or human and / or animal safety limits for the sanitizing radiation.

The invention discloses a transcriptomics analysis-based far ultraviolet-peracetic acid disinfection effect evaluation method and an application of the transcriptomics analysis-based far ultraviolet-peracetic acid disinfection effect evaluation method. Specifically, it is found through transcriptomics analysis that related genes such as SAOUHSC00277, SAOUHSC02283, lacF, dnaK, mreC and Slp family genes and F-type ATP enzyme coding genes can serve as markers to be used for evaluating the far ultraviolet-peracetic acid disinfection effect, and the SAOUHSC00277 genes, the SAOUHSC02283 genes and the lacF genes are specific genes of a UV222 / PAA treatment group. Besides, the invention further provides a transcriptomics analysis-based far ultraviolet-peracetic acid disinfection effect evaluation method and device, the method and device are applied to disinfection detection equipment, automatic and intelligent real-time monitoring and feedback control of the disinfection effect in the water treatment process can be achieved, and the method and device have excellent application prospects.

The invention relates to the technical field of wastewater treatment, in particular to a membrane distillation system and method for pretreating breeding wastewater by activating sulfite, and the method comprises the following steps: step 1, obtaining breeding wastewater to be treated, adding sulfite into the breeding wastewater to be treated, and uniformly stirring to obtain first sewage; step 2, putting the first sewage into a far ultraviolet reaction device, performing far ultraviolet irradiation treatment, and synchronously stirring to obtain second sewage; and 3, introducing the second sewage into a direct contact type membrane distillation system, and carrying out advanced treatment and concentration. According to the method disclosed by the invention, sulfite in water is selectively and efficiently activated by taking far ultraviolet light as a high-energy photon source, and a reaction system dominated by sulfate free radicals and hydrated electrons is constructed at normal temperature and normal pressure in the presence of dissolved oxygen, so that efficient degradation of organic pollutants in aquaculture wastewater and fundamental inhibition of membrane pollution potential are realized.

The present application relates to a kind of far ultraviolet photolysis and oxidation coupling sewage treatment device, including treatment pool body, the side of treatment pool body is equipped with water inlet pipe and oxidant pipe, respectively for input sewage and oxidant, opposite side is equipped with overflow effluent weir, the inside of treatment pool body includes shallow clear zone from top to bottom, turbidity zone, heavy turbidity zone and hopper zone;Shallow clear zone is uniformly provided with several vertical far ultraviolet lamp one, turbidity zone and heavy turbidity zone are uniformly provided with several rotatable photolysis components, photolysis component includes center shaft and the upper photolysis part and lower photolysis part on center shaft, upper photolysis part is in turbidity zone, lower photolysis part is in heavy turbidity zone;Upper photolysis part includes several far ultraviolet lamp two around center shaft, lower photolysis part includes several horizontal far ultraviolet lamp three around center shaft;Far ultraviolet lamp one and photolysis component provide light source for the region of different sludge content in treatment pool body, for photolysis pollutant in sewage.

A fully transparent ultraviolet (UV) or far-ultraviolet (FUL) LED is disclosed, wherein all semiconductor layers except the active region are transparent to radiation emitted in the active region. A key technology enabling this invention is a transparent tunnel junction, which replaces the light-absorbing p-GaN and metal mirror p-contact regions currently found in all commercially available UV LEDs. This tunnel junction also allows for the use of a second n-AlGaN current-diffusing layer above the active region (on the p-side of the device), similar to the current-diffusing layer already present below the active region (on the n-side of the device). Therefore, small-area and / or remote p-contact and n-contact regions can be used, and light can be extracted from both the top and bottom sides of the device. This fully transparent semiconductor device can then be encapsulated using a transparent material to form a fully transparent UV or FUL LED with high brightness and high efficiency.

A disinfection device system of a building comprising: a controller comprising at least one processor and at least one memory having instructions stored thereon that, when executed by the at least one processor, are configured to cause the at least one processor to: monitor one or more conditions of a space in the building; and selectively activate and deactivate at least one Far UV-C disinfection device installed in the space using the conditions of the space and one or more of an energy budget, a target total operating cost, or a net emissions target, wherein the Far UV-C disinfection device comprises at least one Far UV-C light source structured to output disinfecting light at a wavelength between 200 nm and 230 nm.

The invention discloses a method for removing organic pollutants and pathogenic microorganisms in water based on a far ultraviolet light Fenton system.The method includes the steps that an Ag2O / BiVO4 heterojunction is added into the far ultraviolet light Fenton system to treat the water body containing the organic pollutants and / or the pathogenic microorganisms, and the Ag2O / BiVO4 heterojunction comprises BiVO4 microcrystals; ag2O nano-particles grow on the surface in situ, and a Type-II heterojunction structure is formed. According to the method, under the combined action of the Ag2O / BiVO4 heterojunction, far ultraviolet light and H2O2, an Ag2O / BiVO4 / UV222 / H2O2 system with excellent comprehensive performance can be constructed, organic pollutants and pathogenic microorganisms in water can be efficiently removed, and the method has the advantages of being simple in process, convenient to operate, low in cost, high in treatment efficiency, good in mineralization effect, high in disinfection capacity, environmentally friendly and the like, and is high in use value and good in application prospect.

The invention relates to the technical field of excimer lamps, and discloses a preparation method of a composite narrow-band filtering optical filter and an excimer nanoinstrument.The preparation method comprises the steps that a quartz glass substrate is cleaned, and the surface roughness Ra is made to be smaller than 1 nm; depositing a SiO2 layer on the quartz glass substrate by adopting an ion beam sputtering method to form a first buffer film layer; a high-refractive-index gamma-Al2O3 film layer with the thickness of 34.2 nm is formed on the first buffer film layer, then a low-refractive-index SiO2 film layer with the thickness not larger than 47.8 nm is formed on the high-refractive-index gamma-Al2O3 film layer, and the steps are cycled to obtain alternating deposition film layers; depositing on the alternately deposited film layer to form a termination Al2O3 film layer with the thickness of not more than 50nm; a SiO2 layer with the thickness not larger than 30 nm is deposited on the termination Al2O3 film layer to form a second buffer film layer; and forming an aluminum film layer on the second buffer film layer, and depositing a protective film layer on the aluminum film layer. According to the preparation method of the composite narrow-band filtering optical filter and the excimer nanometer, the effect that 222-nanometer-waveband far ultraviolet rays penetrate through the optical filter can be effectively improved, and the disinfection and sterilization effect can be improved.

The invention discloses a method for degrading antibiotics in water by activating titanium dioxide nanosheets through far ultraviolet light to strengthen percarbonate oxidation, and belongs to the technical field of water environment pollution treatment and photocatalytic advanced oxidation. The method for degrading the antibiotics in the water comprises the following steps: mixing a titanium dioxide nanosheet catalyst and percarbonate in an aqueous solution containing the antibiotics to obtain a mixed system, and then carrying out photocatalytic degradation reaction under far ultraviolet light. Compared with a traditional catalytic percarbonate oxidation system, high-energy far ultraviolet light is introduced, a titanium dioxide catalyst which is more beneficial to photo-induced electron / hole separation is developed and acts on activation and oxidation of a solid percarbonate oxidizing agent which is environmentally friendly, low in price and high in anti-interference performance, rapid degradation of antibiotics in water can be achieved, and the treatment effect is good. And the method has good application value.

The onium salt comprises a cation having the following formula (1A) and an anion having the following formula (1B). The onium salt can be used for a chemically amplified resist composition having high sensitivity, excellent resolution, and improved lithographic performances such as EL, LWR, CDU, and DOF and capable of suppressing resist pattern collapse particularly in photolithography using high-energy radiation such as far ultraviolet rays, electron beam (EB), and EUV.

A surface treatment system can include a reconfigurable frame structure at least partially defining a treatment area. The frame structure can include panels configured for repeated assembly and disassembly in any of a plurality of configurations and far-UVC light sources configured to emit far-UVC light directed into the treatment area. The surface treatment system also can include sensors configured to acquire presence data corresponding to a presence of an object in the treatment area and a control unit configured to operate the plurality of far-UVC light sources to treat surfaces of the object located in the treatment area using the presence data.

The invention belongs to the technical field of water treatment, and particularly relates to a halogen self-activation synergistic far-ultraviolet disinfection system and method for mariculture tail water, and the halogen self-activation synergistic far-ultraviolet disinfection system comprises a precise dosing module, a static spiral mixing disinfection module, a far-ultraviolet enhanced disinfection module, a reduction neutralization module and an intelligent central control module; the precise dosing module comprises a pH sensing and regulating unit and an oxidant dynamic dosing unit; through a preposed halogen self-activation process, active halogen species are utilized to perform first-round efficient inactivation on microorganisms in advance, so that the initial microorganism load of a subsequent ultraviolet disinfection module is remarkably reduced, and the inactivation load is reduced; the active halogen species generated in the process can serve as an efficient free radical precursor, more free radicals with higher reaction activity can be generated under far ultraviolet irradiation, the utilization efficiency and energy conversion value of ultraviolet photons are greatly improved, and finally thorough disinfection is achieved with lower ultraviolet dosage and energy consumption.

The utility model discloses a far ultraviolet light water quality purification device. The device comprises a box body, and an algae bearing container and an ultraviolet irradiation assembly which are mounted in the box body. The ultraviolet irradiation assembly comprises an ultraviolet lamp and a collimator. And the ultraviolet lamp is mounted at the top of the inner cavity of the box body, and is provided with an opening aiming at the top of the algae bearing container. And the collimator tube is fixed with the inner cavity of the box body and is positioned between the ultraviolet lamp and the algae bearing container. The constant-temperature bath is arranged in the device, and the temperature of water in the algae bearing container is kept stable by circularly inputting a liquid medium with constant temperature, so that the influence of temperature fluctuation on the algae killing efficiency and the influence on the experiment precision are avoided. According to the utility model, the magnetic stirrer is introduced to stir the algae suspension, so that algae in the water body are uniformly illuminated, and the influence of different water body flowing conditions on the ultraviolet algae killing efficiency can be known.

The present disclosure provides a device that may include a calibrated deep UV sensor head, control microelectronics, rechargeable batteries, displays, and / or network tools for data communication through the cloud. The disclosed device can detect and measure Far UV-C radiation, allowing information to be shared with users in remote locations. It may be compact, portable, and can be integrated into any Far UV-C devices or systems. Specifically designed for monitoring and potentially controlling Far UV-C radiation with wavelengths below 240 nm, this device may be ideal for use in various indoor settings where preventing overexposure to Far UV-C is crucial. Additionally, the measured intensities can be transmitted via common wireless communication protocols such as Wi-Fi, Bluetooth, GSM, and telecommunication networks.

An unmanned surface vessel (USV) system for algae control, based on 222nm mercury-free far-ultraviolet lamps and their combined processes, belongs to the field of water environment management technology. Addressing the issues of delayed response to cyanobacterial blooms in water sources, limited treatment capacity of existing mobile devices with closed reactors, and single-parameter control, the system uses an USV as its platform, integrating a 222nm mercury-free far-ultraviolet lamp matrix, an automatic dosing unit, and an intelligent sensing and adaptive control module. The mercury-free far-ultraviolet lamp matrix adopts an open structure, directly immersed in the water body for large-area in-situ irradiation; the intelligent sensing and adaptive control module collects multi-dimensional parameters such as algal density, chlorophyll a, and algal toxins in real time; the central control system incorporates a built-in PID multi-parameter coupling model to dynamically adjust the irradiation intensity and dosing dosage, using algal toxin concentration as the feedback endpoint to form a closed-loop control. It possesses advantages such as wide-area in-situ coverage, high efficiency, mercury-free environmental protection, and on-demand intelligent energy saving, making it suitable for routine operation and maintenance and emergency response in lake and reservoir-type water sources.

Electrical connectors and fixtures, and more particularly, electrical plug and socket combinations allowing quick connection and mounting of electrical fixtures are provided with a disinfection feature for disinfecting air and / or surfaces. Additionally, lighting fixtures include or are retrofitted to provide both lighting and disinfection functions. The disinfection feature can be provided by any suitable source of UV radiation, such as an LED array. The emitted UV radiation is UV-A or FAR UV-C so that disinfection can occur regardless of whether a human is exposed to the emitted UV radiation or the emitted UV radiation is UV-C so that disinfection should only occur if there is no human exposure to the emitted UV radiation. Some electrical connectors and fixture can provide both types of emitted UV radiation, which are selectively actuatable.