91 results about "Human decontamination" patented technology

A decontamination system having modular components to efficiently decontaminate enclosures of various dimensions. The decontamination system includes a main unit comprising a controller, a supply of liquid decontaminant, a vaporizer for vaporizing the liquid decontaminant to generate a vaporized decontaminant, and a destroyer for breaking down hydrogen peroxide into water and oxygen. An embodiment of the present invention includes a detachable dryer and a detachable external blower that are in fluid communication with the main unit. An optional external destroyer and an optional external dryer may be controlled by the controller of the main unit to respectively increase the destroying and drying capacity of the decontamination system.

A decontamination system includes a spraying system in an enclosed chamber for application of a decontamination fluid having a liquid carrier, such as water, and an enzyme-based decontaminating chemical additive. The additive contains an organophosphorus compound-degrading enzyme. The decontamination system also includes a fluid flow control system that ensures delivery of decontamination fluid to spray nozzles. The fluid flow control system features a recirculation system that collects runoff from the chamber and transports the collected runoff to a decontamination reactor. The decontamination reactor removes contaminants from the collected runoff liquid and permits the collected runoff liquid to be reused for further decontamination, thus taking advantage of the catalytic characteristic of the enzyme.

Ultrasonic solvent cleaning processes can effectively decontaminate sensitive equipment. The disclosed decontamination liquids meet the following criteria:a. It is compatible with a wide range of sensitive equipment—the performance of electronic and optical equipment is not affected by immersion in decontamination liquid.b. The principal chemical warfare agents of concern are sufficiently soluble in decontamination liquid for it to be an effective decontamination medium.c. The principal chemical warfare agents of concern are quantitatively removed from solution in decontamination liquid by activated carbon. When agent contaminated decontamination liquid is passed through a bed of activated carbon, the agent adsorbs onto the activated carbon, resulting in agent free decontamination liquid that can be recycled and reused.d. It is nonflammable, nontoxic, and environmentally acceptable.Ultrasonic agitation provides effective mass and physical transfer of contaminants from the surfaces of the objects being decontaminated to the bulk of the decontamination liquid.Contaminant removal occurs in three steps: removal of the contaminant from the surface of the part being processed, transfer of the dissolved or suspended contaminant into the bulk of the decontamination liquid in the immersion sump, and then removal of the dissolved contaminant by activated carbon adsorption, or suspended contaminant by filtration.Biological contaminants are also effectively removed or inactivated by immersion and sonication in decontamination fluid or solutions of a soluble surfactant in decontamination fluid.Activated carbon beds and filters that come into contact with contaminated liquid can be contained in commercially available housings that shield the system operator from any contained toxic contents. These sealable containers, and their contents, can be destroyed by standard methods, such as incineration.Spectrographic fluorimetry can detect extremely low levels (of the order of 10 ppt) of fluorescent dyes dissolved in decontamination fluid.Decontamination of sensitive equipment in decontamination fluid can be performed in commercially available ultrasonic vapor degreasers.

A system for microbially and / or chemically decontaminating a room such as a hotel room includes a vapor generator which supplies a decontaminant vapor, such as hydrogen peroxide vapor to the room. The room is then aerated to a level at which it is safe for normal occupants to enter. By using a two step aeration, with a second step at lower humidity than the first, the concentration of residual hydrogen peroxide is reduced rapidly to safe levels of 1 ppm or less, typically about 0.5 ppm, in under four hours. The room is rendered substantially free of contaminants, such as those responsible for Severe Acute Respiratory Syndrome (SARS), Norwalk virus, and unpleasant odors.

The disclosure provides compositions and methods for making a colorized solution of an aqueous disinfectant that is both stable in bulk solution and will fade to clear within a predetermined period of time after being applied to a surface, for example as a spray or film. The compositions and methods described here allow an end user to visualize both the extent of coverage and the duration of contact of the disinfectant with the surface, thereby providing more efficient disinfection of the surface.

The disclosure provides compositions and methods for making a colorized solution of an aqueous disinfectant that is both stable in bulk solution and will fade to clear within a predetermined period of time after being applied to a surface, for example as a spray or film. The compositions and methods described here allow an end user to visualize both the extent of coverage and the duration of contact of the disinfectant with the surface, thereby providing more efficient disinfection of the surface.

The invention discloses an ultrasonic electrolysis based automatic decontamination system for removing radioactive surface contamination. According to electrochemical principles, an object to be decontaminated is taken as an anode, the wall of a first decontamination pit is taken as a cathode, contaminant is dissolved uniformly by the aid of chemical decontamination solution, contamination nuclide is dissolved in the decontamination solution, then ultrasonic decontamination is carried out repeatedly; and further, the object is heated and soaked and finally is sprayed and then dried by a spraying and drying measurement device; after radioactive surface contamination index of the object to be decontaminated is detected, whether the object is needed to be decontaminated again or not is determined; the decontamination work is finished until the surface of the object to be decontaminated reaches the radioactive surface contamination control index. The ultrasonic electrolysis based automatic decontamination system realizes surface decontamination, automatic drying, online monitoring, conveying and recovering of the object to be decontaminated, and has effect of reducing dispersion of radioactive contamination. Besides, emission of radioactive waste liquid is reduced by reuse of the decontamination solution, work efficiency is improved, labor intensity of working personal is reduced, and exposure dose of the working personal is lowered.

In a chemical decontamination method of chemically decontaminating radioactive nuclides from a metallic material, oxalic acid and hydrazine are injected as a reductive decontaminating agent into water that is in contact with the metallic material. Injection of the hydrazine is stopped after a cation resin arranged in a circulation line connected to the metallic material breaks, and at least the oxalic acid and the hydrazine in the reductive decontaminating agent are decomposed using a decomposing catalyst.

Provided is a method of decontaminating an area via low-level concentration of germicidal agent, and related device. The method comprises releasing a germicidal agent into the area from a germicidal source, controlling the germicidal agent concentration in the area to a predetermined concentration that does not exceed a Permissible Exposure Limit, and contacting microorganisms in the area with the germicidal agent to decontaminate the area. The device comprises a releasing mechanism configured to release a germicidal agent from a germicidal source at a predetermined concentration into the area such that the predetermined concentration of germicidal agent in the area does not exceed a Permissible Exposure Limit.

The invention relates to compositions and methods for prion degradation, decontamination or disinfection. The composition comprises an oxidizing agent, one or more proteases and a surfactant such as an ionic surfactant / detergent. The method comprises contacting a prion contaminated entity with a prion-degrading composition comprising an effective amount of an oxidizing agent, an effective amount of at least one protease, and an effective amount of a surfactant. The components of the composition may be contacted with a prion-contaminated entity sequentially or simultaneously using an aqueous composition. Typically at least two different proteases are used for optimal efficacy. Preferably the oxidizing agent comprises peracetyl ions or a source thereof. The invention also relates to kits comprising the various reagents.

The disclosure provides compositions and methods for making a colorized solution of an aqueous disinfectant that is both stable in bulk solution and will fade to clear within a predetermined period of time after being applied to a surface, for example as a spray or film. The compositions and methods described here allow an end user to visualize both the extent of coverage and the duration of contact of the disinfectant with the surface, thereby providing more efficient disinfection of the surface.

The invention discloses a manufacturing process, which has the following flows: a, sorting, namely selecting nylon66 dyed fuzz with the fuzz fineness between 0.6 and 3.3dtex and the length between 0.2 and 3mm as a raw material; b, performing refining treatment, namely rinsing flocking grey cloth at a temperature of 50 DEG C for 30min, dewatering, and drying the dewatered flocking grey cloth in a roller of a drier at a temperature between 80 and 100 DEG C; c, performing dipping treatment, namely pouring finishing liquor into a flume, adjusting air pressure of a rolling machine, controlling theliquid absorption rate of the flocking grey cloth to between 35 and 50 percent, enabling the flocking grey cloth after the refining treatment to pass through the flume and be moisturized by the finishing liquor, and enabling the finishing liquor to evenly permeate the cloth under the pressure of a roll; d, performing drying treatment, namely drying the flocking grey cloth in the roller of the drier at a temperature between 80 and 100 DEG C; and e, performing baking treatment, namely baking the flocking grey cloth after the drying treatment at a temperature between 160 and 170 DEG C for 2 min.

The method and apparatus of the embodiments of the present invention employ an in-situ particle decontamination technique that allows for such decontamination while a wafer is a vacuum tool or deposition chamber, thereby eliminating the need for another device for performing decontamination. This in-situ decontamination is effective for particle contamination resulting, for example, from tool resident mechanical component. Furthermore, particle decontamination is performed in the presence of plasma, having a potential for helping to maximize a “self bias” voltage, under RF conditions, and is integrated into the vacuum process.

A storm water treatment device that is installed under the grate of new or existing catch basins, and more commonly referred to as an insert. The catch basin decontamination apparatus has a universal housing and support ring that allows one design to fit most applications. Adjustable chains allow for proper position below grate and a semi-flexible molded or rigid deflector directs incoming drain water to the housing. A slip-on filter / absorber cartridge fits over a perforated drain tube, in the center of the housing, allowing the drain water to first pass through the filter / absorber media before exiting through the drain tube and out the bottom of the housing. The filter / absorber cartridge includes a variety of absorber materials that absorb oil and repel water. Activated carbon, microbes and other site specific absorbents can be used in the replaceable slip-on cartridge. A leaf pre-strainer helps prevent leaves and debris from entering the housing. A clean in place suction tube and clod buster form of the apparatus aids in cleaning the housing.

The invention relates to compositions and methods for prion degradation, decontamination or disinfection. The composition comprises an oxidizing agent, one or more proteases and a surfactant such as an ionic surfactant / detergent. The method comprises contacting a prion contaminated entity with a prion-degrading composition comprising an effective amount of an oxidizing agent, an effective amount of at least one protease, and an effective amount of a surfactant. The components of the composition may be contacted with a prion-contaminated entity sequentially or simultaneously using an aqueous composition. Typically at least two different proteases are used for optimal efficacy. Preferably the oxidizing agent comprises peracetyl ions or a source thereof. The invention also relates to kits comprising the various reagents.

Ultrasonic solvent cleaning processes can effectively decontaminate sensitive equipment. The disclosed decontamination liquids meet the following criteria:a. It is compatible with a wide range of sensitive equipment—the performance of electronic and optical equipment is not affected by immersion in decontamination liquid.b. The principal chemical warfare agents of concern are sufficiently soluble in decontamination liquid for it to be an effective decontamination medium.c. The principal chemical warfare agents of concern are quantitatively removed from solution in decontamination liquid by activated carbon. When agent contaminated decontamination liquid is passed through a bed of activated carbon, the agent adsorbs onto the activated carbon, resulting in agent free decontamination liquid that can be recycled and reused.d. It is nonflammable, nontoxic, and environmentally acceptable.Ultrasonic agitation provides effective mass and physical transfer of contaminants from the surfaces of the objects being decontaminated to the bulk of the decontamination liquid.Contaminant removal occurs in three steps: removal of the contaminant from the surface of the part being processed, transfer of the dissolved or suspended contaminant into the bulk of the decontamination liquid in the immersion sump, and then removal of the dissolved contaminant by activated carbon adsorption, or suspended contaminant by filtration.Biological contaminants are also effectively removed or inactivated by immersion and sonication in decontamination fluid or solutions of a soluble surfactant in decontamination fluid.Activated carbon beds and filters that come into contact with contaminated liquid can be contained in commercially available housings that shield the system operator from any contained toxic contents. These sealable containers, and their contents, can be destroyed by standard methods, such as incineration.Spectrographic fluorimetry can detect extremely low levels (of the order of 10 ppt) of fluorescent dyes dissolved in decontamination fluid.Decontamination of sensitive equipment in decontamination fluid can be performed in commercially available ultrasonic vapor degreasers.

Provided is an efficient sewage heat exchange system capable of carrying out on-line cleaning and automatic decontamination. Filtration is carried out on dirt and impurities through devices such as a grit chamber, a water taking pool and a hair filter, filtered sewage enters a sewage heat exchanger along with solid particles separated through a solid-liquid separator to participate in heat exchange, meanwhile, a control valve b, a control valve c, a control valve d and a control valve e are arranged on four sewage pipes respectively, the sewage pipes are connected with the sewage heat exchanger, and back washing is carried out on the sewage pipes through switching between opening and closing of the control valves. The problems that in the process of using the sewage as a cold and heat source, the dirt and the impurities block pipelines, hair blocks a heat exchange device, the size of the heat exchange device is large due to the dirt, and performance reduction and faults of the heat exchange device are caused by turbid water are thoroughly solved; heat exchange performance of the efficient sewage heat exchange system is greatly improved, it is ensured that the efficient sewage heat exchange system is safe, reliable and stable, the efficient sewage heat exchange system can be used for using the sewage or surface water as a low-level cold and heat source to carry out cooling and heating through a heat pump technology, or used for cooling industrial devices, and high efficiency and environmental friendliness are achieved.

Disclosed herein is a method of treating radioactive metal waste using melt decontamination, wherein radioactive metal waste, which is generated from nuclear fuel processing facilities or nuclear fuel production facilities, and which cannot be easily treated by surface decontamination because it has a complicated geometric shape, and the surface contamination of which cannot be measured, can be treated by melt decontamination. The method is advantageous in that radioactive metal waste, which cannot be treated by conventional surface decontamination, can be treated, so that radioactive metal waste can be recycled, thereby obtaining economic profits, and further in that a large storage space necessary for cutting and then storing radioactive metal waste is not required, and in that excessive manpower and cost are not required.

The invention discloses an energy-saving water gate having a decontamination function. The energy-saving water gate comprises a control box and a solid housing installed below the control box, whereinan installing cavity is formed in the control box, a first motor is arranged in the installing cavity, hydraulic telescopic rods are symmetrically arranged at the driving end of the first motor and are fixedly connected to the inner wall of the installing cavity, first turning holes and second turning holes which are communicated with the installing cavity are formed in the bottom of the controlbox, the ends, away from the control box, of the hydraulic telescopic rods penetrate through the first turning holes to extend to the outside of the control box and to be fixedly connected with the solid housing, a second motor is arranged below the first motor, and a first rotary rod is arranged at the driving end of the second motor. The energy-saving water gate can select small-scale water drainage and large-scale water drainage according to the actual situations and facilitates energy saving. In addition, a rotary scraping piece clears sludge and garbage at the bottom of the gate while water drained by the gate rises, the danger of artificial decontamination is avoided, and the service life of the energy-saving water gate is also prolonged.

Disclosed herein is a melting apparatus for melt-decontaminating radioactive metal waste. The melting apparatus includes a melting furnace, a high frequency generator, a ladle, a bogie, a cooling unit and a dust collector. The melting furnace includes a crucible into which the metal waste is input, and an induction coil which is wound around the crucible to melt the metal waste. The induction coil has a hollow hole in which cooling fluid flows. The high frequency generator applies high-frequency current to the induction coil. The ladle supplies molten metal, from which slag has been removed in the crucible, into molds. The bogie is disposed adjacent to the ladle and is provided with the molds, each of which forms an ingot using the molten metal supplied thereinto. The cooling unit cools the cooling fluid and circulates it along the induction coil. The dust collector filters out dust and purifies gas.

A method for chemically decontaminating radioactive material. The method includes reducing-dissolving step for setting surface of radioactive material in contact with reducing decontamination liquid including mono-carboxylic acid and di-carboxylic acid as dissolvent; and oxidizing-dissolving step for setting the surface of the radioactive material in contact with oxidizing decontamination liquid including oxidizer. The method may include repeated pairs of steps, each pair including the reducing-dissolving step and the oxidizing-dissolving step. The mono-carboxylic acid may include formic acid, and the di-carboxylic acid includes oxalic acid. The oxidizer may be ozone, permanganic acid or permanganate.

A system for microbially and / or chemically decontaminating a room such as a hotel room includes a vapor generator which supplies a decontaminant vapor, such as hydrogen peroxide vapor to the room. The room is then aerated to a level at which it is safe for normal occupants to enter. By using a two step aeration, with a second step at lower humidity than the first, the concentration of residual hydrogen peroxide is reduced rapidly to safe levels of 1 ppm or less, typically about 0.5 ppm, in under four hours. The room is rendered substantially free of contaminants, such as those responsible for Severe Acute Respiratory Syndrome (SARS), Norwalk virus, and unpleasant odors.

The invention discloses a decontamination box of long workpieces for cleaning contaminated nuclear devices. The decontamination box consists of a box body, two clapboards, 39 ultrasonic vibration boxes, a box cover automatic opening and closing system, a ventilation system and the like. Because the decontamination box is provided with two clapboards to divide the decontamination box into mutually independent cleaning units, three cleaning units are not mutually interfered and does not cause the cross contamination when cleaning small components in different types; because each working unit is provided with 13 ultrasonic vibration boxes to form a special cleaning manner combining the chemical decontamination with the mechanical contamination, the cleaning effect is good; and the box cover automatic opening and closing system and the ventilation system of the decontamination box ensure that radioactive gas escape does not happen in the cleaning process, thereby improving the safety performance.

A composition for decontaminating a highly toxic material, wherein the composition includes a modified reactive sorbent comprising a reactive sorbent in combination with a sufficient amount of an organic solvent to saturate the pores of the reactive sorbent to yield a non-slurry, free flowing mixture. The present invention is further directed to a method for making such compositions and method for decontaminating surfaces using such compositions.

A method for the decontamination of carcasses includes using a flame decontamination process in which carcasses are subjected to temperatures produced by a direct flame source for a period of time sufficient to achieve an effective degree of surface pasteurization.

A method for decontamination of a contaminated region containing biological species to be destroyed, includes a decontamination step during which a decontamination gas containing atomic nitrogen is propagated in the contaminated region, and atomic nitrogen contributes to the destruction of biological species in the contaminated region.

The invention relates to a decontamination laundry detergent and a preparation method thereof. The decontamination laundry detergent comprises the following components in percentage by weight: 20% of soapberry extract, 13% of Chinese honey locust extract, 12% of Nacl, 6% of an anionic surfactant, 3% of a nonionic surfactant, 2% of clove oil, 8% of ethanol and 40% of deionized water. The decontamination laundry detergent solves the problem of poor decontamination effect when clothes are protected. The decontamination laundry detergent has strong decontamination capability but does not destroy the color of the clothes.

The invention concerns derivatives of per-(3,6-anhydro)-cyclodextrin, their preparation and their use in separating polluting ions, for example in human decontamination. These derivatives correspond to one of the following formulae: in which at least one of the R1 groups represents the group -OCH2COOH and the other R1 groups, which may be identical or different, represent a group that corresponds to one of the following formulae: OH, OR2, SH, SR2, OCOR2, NH2, NHR2, NR2R3,CONH2, CONHR2, CONR2R3, CN, COOR2, COOH and R2, in which R2 and R3, which may be identical or different, represent an aliphatic or aromatic hydrocarbon group, either saturated or unsaturated, which may include one or several hetero-atoms comprising O, S and N, and n is equal to 6, 7 or 8.