74 results about "Ozone degradation" patented technology

A process for combined ozone degradation and filtration using a multi-layered, nanocrystalline, sintered ceramic, metal oxide catalyst and ceramic membrane filter is described. The process reduces fouling of the membrane and degrades ozone remaining in the water from ozonation of water to kill microorganisms.

The invention discloses a deep papermaking wastewater treatment device. The device comprises a filtering pretreatment system, an ozone generation system, an ozone contact advanced oxidation tower system, a residual ozone degradation pond system and an upflow biologic aerated filter system, wherein the filtering pretreatment system, the ozone contact advanced oxidation tower system, the residual ozone degradation pond system and the upflow biologic aerated filter system are connected in sequence, and the ozone generation system is connected with the ozone contact advanced oxidation tower system. The invention further discloses a deep papermaking wastewater treatment method. According to the device, the filtering pretreatment system, the ozone contact advanced oxidation tower system, the residual ozone degradation pond system and the upflow biologic aerated filter system are combined, so that papermaking wastewater can be deeply treated, and the treated wastewater meets the standards.

The invention discloses a regeneration method for activated carbon or a carbon-based catalyst. The method comprises the following steps that the methylene blue value of inactivated activated carbon ismeasured, or ozone degradation is catalyzed by a carbon-based catalyst to decrease the COD (chemical oxygen demand), and the removal rate of COD (chemical oxygen demand) is measured; the inactivatedactivated carbon or the carbon-based catalyst is soaked into a NaOH solution; ozone is introduced into the NaOH solution; the activated carbon or the carbon-based catalyst is taken out from the NaOH solution and is washed thoroughly with clean water, and then dehydrating and drying are carried out so as to obtain the regenerated activated carbon or the regenerated carbon-based catalyst; and the methylene blue value of the obtained regenerated activated carbon is measured and is compared with the original measured methylene blue value, the activation effect of the activated carbon is evaluated,or ozone degradation is catalyzed by the obtained regenerated carbon-based catalyst to decrease the COD (chemical oxygen demand), the removal rate of the COD (chemical oxygen demand) is measured andis compared with the original measured removal rate of the COD (chemical oxygen demand), and the activation effect of the carbon-based catalyst is evaluated. The method has the advantages of being good in activation effect, short in time and high in activation efficiency.

The invention relates to a cavitation jet-flow ozone degradation oxygenating device for marine product breeding. The device comprises a spray nozzle, an air suction chamber, air suction pipes, a self-excitation vibration chamber, pipework and a diffusion pipe; the outer side of the air suction chamber is provided with the air suction pipes and a liquid inlet, the spray nozzle is connected to the liquid inlet of the air suction chamber, and the air suction chamber is connected with an inlet of the self-excitation vibration chamber; the pipework is connected with an outlet of the self-excitationvibration chamber, and an inlet of the diffusion pipe is connected with an outlet of the pipework. A water pump pumps working water in an aeration tank, the working water is subjected to pressurization and then sprayed out from the spray nozzle, ozone is sucked into the air suction chamber through the air suction pipes and mixed with the water, the mixture enters the self-excitation vibration chamber to form a pulse cavitation jet flow, and finally the liquid-gas mixture is discharged through the diffusion pipe. According to the cavitation jet-flow ozone degradation oxygenating device, a constant jet flow is changed into a pulse jet flow, the capacity of gas entrainment of the airflow is improved, the cavitation jet flow is generated, oxygenating is completed, microorganisms in the waterare removed for achieving the function of oxygenating and cleaning at the same time, the ozone can be degraded through the cavitation jet flow, and the mass transfer efficiency of oxygen is improved.

The invention discloses a high-efficiency vegetable pesticide residue degradation method and device. Fresh vegetables are subjected to ultrasonic cleaning in an ultrasonic cleaning tank, and treated through a first bubble cleaning tank, an ozone degradation machine, a second bubble cleaning tank, a vibrating draining track and a wind blow-drying track in sequence. The pesticide residue in the vegetables is efficiently degraded by adopting an ultrasonic and ozone combined strong oxidation method, fast and efficient degradation of the vegetable pesticide residue is achieved, the high-efficiency vegetable pesticide residue degradation method and device have the characteristics of being easy to operate, free of secondary pollution and thorough in pollutant degradation, and have the advantages of being high in efficiency and low in cost.

The invention relates to a low concentration organic waste gas concentrating, catalyzing and purifying device, the low concentration organic waste gas concentrating, catalyzing and purifying device comprises a first induced draft fan, a second induced draft fan, a third induced draft fan, a fourth induced draft fan, an ozone generator, a heat exchanger, a preheating chamber, a catalytic combustor,a multi-level adsorption catalysis bed and an ozone degradation catalysis bed. The invention further provides a use method of the low concentration organic waste gas concentrating, catalyzing and purifying device. The low concentration organic waste gas concentrating, catalyzing and purifying device is suitable for processing the low-concentration organic waste gas in the intermittent operation,the function of oxidizing the low-concentration VOCs (Volatile Organic Compounds) through the ozone is introduced, the effective adsorption time of an adsorption material is prolonged, and the fluctuation of the concentration of the VOCs in the desorption process is effectively controlled.

The invention relates to a monolithic catalyst for catalyzing ozone to degrade VOCs, and belongs to the technical field of catalyzing ozone to oxidize VOCs. The monolithic catalyst comprises inorganic ceramic and a molecular sieve, the molecular sieve is loaded on the inorganic ceramic, and the specific surface area of the inorganic ceramic is 30-250 m<2>/g; the surface of the inorganic ceramic comprises micropores, and the aperture of the micropores is 5-10 microns; the specific surface area of the molecular sieve is 300-600 m<2>/g, and the silica-alumina ratio of the molecular sieve is not less than 5; the molecular sieve is loaded with a non-noble metal oxide, and the mass of the non-noble metal oxide accounts for 0.5-10% of the mass of the molecular sieve; the surface of the inorganic ceramic is coated with silica sol, and an organic pore-forming agent is used in the preparation process of the catalyst; through the treatment that the surface of the inorganic ceramic is coated with the silica sol and the organic pore-forming agent, the mass transfer efficiency and the mechanical stability of the coating are improved while the catalytic action of the active components is fully exerted.

The embodiment of the invention provides an odor treatment method and equipment, and relates to the technical field of environment protection. The method comprises the following steps: collecting odorto be treated; mixing the odor to be treated with ozone; carrying out adsorption buffering and catalytic oxidation reaction on mixed gas by utilizing a honeycomb carrier loaded with a catalyst; discharging a product generated by the reaction. The odor is adsorbed and buffered through the honeycomb carrier loaded with the catalyst, and various components in the odor are subjected to catalytic oxidation decomposition through the ozone with a sufficiently redundant total amount under the catalysis effect of the catalyst loaded on the honeycomb carrier, so that the components are converted into toxin-free and odorless substances to be discharged into atmosphere. The redundant ozone is decomposed into clean oxygen gas for emission under the action of the catalyst. The method provided by the invention has the advantages of rapid ozone degradation speed, high conversion rate, no secondary pollution, lasting effect, easiness for regeneration and recycling and the like; furthermore, the methodalso can cope with the characteristic that an ozone concentration dynamic range is large.

The invention discloses an ultraviolet-assisted ultrasonic coupling electrocatalytic oxidation water treatment system. The system is characterized by comprising a pH regulating tank, a particle filtering module, a microorganism desalting module and an electrochemical degradation module; the electrochemical degradation module comprises an ultrasonic generator, an ultraviolet lamp and a plurality ofprocessing units; any processing unit comprises an anode and a cathode, and the anode is a boron-doped diamond electrode. The invention provides an ultraviolet-assisted ultrasonic coupling electrocatalytic oxidation water high-efficiency energy-saving treatment system. The electrochemical degradation module with the boron-doped diamond electrode as the anode serves as a main body, an ultrasonic generator and an ultraviolet lamp are arranged in the electrochemical degradation module, ozone is generated through the ultraviolet lamp, and coupling linkage of an electrochemical degradation technology, an ultrasonic degradation technology, an ozone degradation technology and an ultraviolet catalytic degradation technology is achieved. Compared with the same type of water treatment technology, the coupling of the four technologies enables the degradation efficiency to be higher, the energy consumption to be reduced, and the system can be widely applied to the treatment of various types of water.

The invention provides a manganese dioxide nano catalytic membrane for catalyzing ozone to degrade organic wastewater and a preparation method of the manganese dioxide nano catalytic membrane, and belongs to the technical field of wastewater treatment. The preparation method comprises the following step: by taking an anodic aluminum oxide film as a template, loading manganese dioxide on the innerwall of a nanopore channel of an AAO film by utilizing a sol-gel method to form manganese dioxide circular nanotubes which are arranged in order, so as to obtain the manganese dioxide nanotube array catalytic membrane. Ozone is used as an oxidizing agent and can be activated into a strong oxidizing substance when passing through the manganese dioxide membrane, so that pollutants in the water bodyare degraded and removed. Compared with a liquid-phase catalytic reaction, the manganese dioxide nano catalytic membrane catalytic system strengthens mass transfer diffusion of pollutants and ozone tothe surface of the manganese dioxide catalyst due to the nano confinement effect, improves the production of oxidizing substances, and shows higher catalytic efficiency.

The invention discloses a cloth wastewater treatment method which includes the steps: (1) removing impurities by filtering; (2) adding coagulants in bleaching; (3) dewatering the impurities again; (4)performing ozone degradation and discoloration; (5) storing wastewater reaching standards. The cloth wastewater treatment method has the advantages that cloth wastewater is treated by the coagulants,good wastewater treatment effects can be achieved, generated condensation products are firm, good in precipitation performance and decolorizing and oil removing effect and not easy to destroy, bleaching treatment is performed in the treatment process, the filtered wastewater is subjected to strong oxidation treatment, the impurities are dewatered, wastewater treatment effects of the operation steps are better than those of common operation, efficiency is high, and pollution is avoided.

The invention discloses a method and a system for removing iron and manganese from underground water. The method comprises the following steps: a, delivering the underground water into a membrane reaction tank, introducing ozone-containing gas into the membrane reaction tank, carrying out ozone aeration through an aerator, allowing ozone to dissolve in the underground water, oxidizing iron into ferric hydroxide precipitates, separating the ferric hydroxide precipitates from the water, oxidizing the manganese into MnO2 particles which cannot be dissolved in the water, and at the same time, carrying out oxidization degrading on odor substances and organic substances in the underground water; and b, controlling ozone-containing water flow to rise and be in contact with a ceramic membrane assembly in the membrane reaction tank, wherein the pore diameter of a ceramic membrane is 10-100nm, the transmembrane pressure difference during filtering is -30kPa to 0, and the water flow filtration flux is kept at 80-120L/m<2>.h; and allowing the ferric hydroxide precipitates, the MnO2 particles and turbid particles in the water to be intercepted and precipitated, and carrying out ozone degradation on the odor substances and part of the organic substances in the water via the ozone in ceramic membrane holes. The removing method and system can effectively and efficiently remove the iron, the manganese and the organic substances in the underground water.

The invention discloses a method for catalyzing ozone to degrade organic pollutants.The method comprises the following steps: synthesizing a copper-cerium binary composite catalyst (CuO-CeO2) by a hydrothermal-roasting method, and characterizing by an X-ray diffractometer (XRD), a scanning electron microscope (SEM) and a transmission electron microscope (TEM). Oxalic acid is used as a model compound, CuO-CeO2 is used for carrying out a continuous flow catalytic ozonation test, the removal rate of the oxalic acid reaches 97.66% after 25 min and is far higher than the removal rate of systems such as O3 (2.66%), CuO/O3 (7.38%) and CeO2/O3 (5.47%) on the oxalic acid, and the mineralization rate of the oxalic acid is 95.21%; the optimal reaction conditions of the CuO-CeO2/O3 system are as follows: the ozone mass concentration is 30mg/L, the catalyst dosage is 0.20 g/L, and the pH value of the solution is 7; and more than 90% of oxalic acid can still be removed after the CuO-CeO2 is recycled for five times, so that the CuO-CeO2 has excellent stability and reusability. In the process of catalyzing O3 by CuO-CeO2, hydroxyl radicals are generated but do not play a leading role, and singlet oxygen is a main active oxidation species causing degradation of oxalic acid.

The present invention relates to a method for degrading a polysaccharide in the field of food, medicine or chemical industry. In particular, a molecular chain of the polysaccharide is broken by ozone into polysaccharides with smaller molecular weights, oligoses and/or oligosaccharides. The polysaccharides include linear or branched glycans extracted from plants, traditional Chinese medicinal materials, animals, fungi, or microorganisms and sulfated polysaccharides or esterified polysaccharides formed by sulfation or esterification thereof. As an oxidizing agent in the reaction, the ozone can be used alone or can be used under the catalysis of a base, a metal ion, hydrogen peroxide, UV light, or activated carbon to accelerate the reaction. The method for degrading the polysaccharide in the present invention uses milder reaction conditions compared to a conventional acid-catalytic degradation method, has higher reaction efficiency and a controllable reaction process, does not need to use an acid, and reduces environmental pollution.

The invention relates to the technical field of refrigerators, and discloses a refrigerator with a pesticide residue removing function and a control method of the refrigerator. The refrigerator comprises a refrigerator body, the refrigerator body comprises a refrigerator shell, a refrigerator inner container and a heat insulation layer arranged between the refrigerator shell and the refrigerator inner container, a refrigerating chamber is formed in the refrigerator inner container, a pesticide residue removing drawer is arranged in the refrigerating chamber and comprises a drawer body, a drawer cover plate, a pesticide residue removing device and an ozone degradation device, and the drawer body is in sliding fit with the refrigerator inner container. The drawer cover plate is arranged on the drawer body in a covering mode and can be matched with the drawer body in a sealing mode, the pesticide residue removing device is arranged on the drawer cover plate and comprises an ion generator capable of generating ions when powered on and an ozone generator capable of generating ozone, and a ozone degradation device is used for degrading ozone in the drawer body. According to the refrigerator with the pesticide residue removing function, the pesticide residue removing efficiency can be improved, the pesticide residue removing effect can be guaranteed, and ozone peculiar smell capable of being perceived by a user can be eliminated.

The invention relates to the technical field of garment washing, in particular to a chemical-free and environment-friendly washing method. A laser printing treatment process is mainly used for replacing traditional hand wiping and coating printing processes, and defects of long process, large consumption and severe pollution of the traditional hand rubbing and coating printing processes are overcome; a pneumatic rubbing whitening treatment process is used to replace chemical material to realize traditional whitening processes such as enzyme washing, stone washing, rinsing and sand washing, a lot of water resources are saved, no sewage is produced, and wastewater emission is reduced; cloth is subjected to decoloration washing with an ozone degradation decoloration process, no chemical materials are used, and environmental pollution is reduced.

The invention discloses an ozone room temperature decomposition honeycomb module and a preparation method thereof. A conventional aluminum honeycomb is taken as a carrier, deionized water, organic manganese salts, organic nickel salts, alumina powder, pseudo-boehmite, and a film forming agent are mixed and homogenized to prepared catalyst slurry, and the catalyst slurry is sprayed on the carrier,and then is blown, dried, and burned to obtain a finished product. The ozone room temperature decomposition honeycomb module has the characteristics of lightness, corrosion resistance, low wind resistance, high decomposition efficiency, and long service life. The preparation of the module is simple, convenient, and environmentally friendly. No gas pollutant such as oxynitride, oxysulfide, or the like, or sewage is discharged. The prepared honeycomb module can be applied to catalytic decomposition of ozone in the air; at a temperature of -10 to 40 DEG C, under a humidity of 30-98 RH%, the ozoneconcentration can be reduced to 0.02 mg/m3 from 1-20 mg/m3; the ozone degradation rate is more than 98%; and the honeycomb module can effectively remove ozone for more than 3500 hours.

The invention provides an ozone degradation device based on high-speed airflow and catalyst gas-solid coupling. The ozone degradation device comprises an air inlet duct serving as a pipeline for inputting airflow; an annular reaction cavity which is a closed space for ozone decomposition, wherein a catalyst for ozone decomposition is placed in the annular reaction cavity, the annular reaction cavity comprises an inlet connected with the air inlet duct and an annular guide ramp extending along the inlet, and an outlet for discharging purified air flow is formed in the guide ramp; a shaking device which is used for preventing the catalyst from being discharged from the outlet and comprises a support structure mounted outside the outlet and a filter screen sleeving the support structure; an eccentric wheel which is connected with the support structure; and a vibrating motor, wherein the eccentric wheel is driven to shake off the catalyst adhered to the filter screen through the vibratingmotor. Ozone flow enters the annular reaction cavity at a high speed through a high-power fan, the contact rate of a catalyst and the ozone flow is increased while ozone activation energy is reduced under the action of high-speed impact of the flow, and low-cost and high-efficiency degradation of ozone is realized.

The invention discloses a smelly gas treatment device for a waste treatment landfill. The smelly gas treatment device comprises a box body, wherein the upper part of the left side of the outside of the box body is fixedly connected with a gas suction port; the gas suction port is fixedly connected with a universal pipe; the universal pipe extends into the box body and is fixedly connected with one end of the a gas inlet pipe; the other end of the gas inlet pipe is fixedly connected with a compressor; the compressor is arranged at the left side of the lower part of the inside of the box body; the compressor is fixedly connected with one end of the a connecting pipe; the other end of the connecting pipe extends into a smelly gas filter box and is fixedly connected with a primary filter screen; the primary filter screen is fixedly connected with a secondary filter screen; the secondary filter screen is fixedly connected with a first connection pipe; the first connection pipe is fixedly connected with an ozone degradation box; and the ozone degradation box is arranged at the right side of the lower part of the inside of the box body. According to the invention, smelly gas is cleaned with water, and the smelly gas is then absorbed for multiple times, thereby lowering the content of the smelly gas in the waste landfill, and reducing the damage to physical and mental health of people due to the smelly gas.