68 results about "Advanced oxidation process" patented technology

The invention relates to the technical field of industrial wastewater treatment, and discloses a treatment method for grinding fluid wastewater of a grinder, which comprises the following steps: pretreatment and demulsification, multi-stage chemical purification, biochemical deep treatment, deep purification and recycling, and sludge treatment. A specific supported heterogeneous catalyst is adopted in the multi-stage chemical purification step, nano zero-valent iron and copper oxide composite active components constructed on the surface of the catalyst can enhance the generation efficiency and stability of free radicals in the advanced oxidation process, and a composite coagulant with an optimized ratio in the coagulating sedimentation step is cooperated, so that the purification efficiency of the high-grade oxidation process is improved. An efficient continuous removal system for heavy metal ions and refractory organic pollutants is formed; meanwhile, in the pretreatment step, the demulsifier is composed of specific components, through the synergistic effect of all the components, rapid demulsification of the emulsified oil phase in the grinding fluid wastewater is achieved, favorable conditions are created for subsequent deep treatment, and therefore the purification efficiency and operation stability of the technology are overall improved.

The invention relates to an oil-water separation membrane as well as a preparation method and application thereof, and belongs to the field of gas field brine pretreatment. The oil-water separation membrane comprises a nanofiber membrane substrate and an MOFs layer loaded on at least part of the surface of the nanofiber membrane substrate, and the MOFs layer comprises two-dimensional MOFs nanosheets; the nanofiber membrane substrate is prepared by performing electrospinning on three-dimensional MOFs and an organic polymer; the two-dimensional MOFs nanosheet is obtained by secondary growth on the surface of the nanofiber membrane substrate through hydrothermal recrystallization. The oil-water separation membrane can be used for efficiently separating petroleum pollutants and solid suspended matters in the oil and gas field produced wastewater, and can be coupled with an advanced oxidation process based on sulfate free radicals to realize synchronous and efficient removal of oil, suspended particles and organic matters in the oil and gas field produced wastewater.

The invention discloses a composite cathode material integrating electrocatalysis and ozone oxidation functions, a preparation method and application. The composite cathode material is composed of oxidized carbon nanotubes, cuprous oxide and copper oxide. The copper loading capacity of the composite cathode material is 1-10wt.%; the diameter of the oxidized carbon nanotube is 5 to 10 nm; the mass ratio of the oxidized carbon nanotubes to the cuprous oxide to the copper oxide is (298-27): (3.0-2.5): (0-1). A composite cathode material integrating electrocatalysis and ozone oxidation functions is elaborately designed and prepared and is applied to an electrocatalytic ozone coupling system, and continuous and efficient attack on antibiotic molecules and degradation intermediates thereof is realized by utilizing multiple synergistic effects among all components of the material and in the electrocatalytic ozone process, so that the electrochemical performance of the composite cathode material is improved. Therefore, the technical bottleneck of low TOC removal rate in the traditional advanced oxidation process is broken through, and a new technical approach is provided for thoroughly eliminating the antibiotic risk in the water environment.

The invention discloses an iron-mud-based environmental functional material based on an electrochemical-ferrate synergistic effect as well as a preparation method and application of the iron-mud-based environmental functional material. The material is derived from an iron sludge byproduct generated in the process of cooperatively treating wastewater by electrochemical oxidation and ferrate. Due to the influence of active oxygen species, electric field action and local pH gradient in an electrochemical system, the forming process of the iron mud is different from that of conventional chemical precipitation, the obtained material has an amorphous and high-specific-surface-area unique structure and is endowed with remarkable oxidation capacity, and cooperation of oxidation and adsorption functions is achieved. The material disclosed by the invention can be used for efficiently removing anion pollutants such as arsenic, antimony and phosphate in a water body. According to the invention, solid wastes generated by a combined process are converted into a high-performance adsorption material, so that the resource utilization of treating wastes with wastes is realized, the comprehensive operation cost of the advanced oxidation process is effectively reduced, and the method has good environmental and economic benefits and application prospects.

This invention relates to the field of industrial wastewater treatment technology, specifically a highly efficient treatment method for methionine wastewater, comprising the following steps: Step 1: pH adjustment, adjusting the pH of the methionine wastewater to 6.0-7.0; Step 2: Polyferric sulfate coagulation and sedimentation, adding polyferric sulfate and polyacrylamide to the pH-adjusted wastewater; Step 3: Pre-stage ozone oxidation, passing the supernatant obtained in Step 2 through ozone-containing gas for oxidation treatment; Step 4: Biochemical treatment, subjecting the effluent from Step 3 to a biochemical reaction, sequentially passing through anoxic and aerobic stages; Step 5: Post-stage ozone oxidation, passing the biochemical effluent obtained in Step 4 again through ozone-containing gas for deep oxidation treatment; Step 6: Activated carbon adsorption. The methionine wastewater treated by this invention can significantly reduce TOC concentration and improve COD removal rate. The pH pre-adjustment step effectively reduces the quenching effect of alkalinity on hydroxyl radicals, ensuring the efficiency of subsequent advanced oxidation processes.

The invention discloses a sewage plant tail water treatment system and method, and relates to the technical field of sewage treatment.The sewage plant tail water treatment system is applied to tail water generated by a sewage plant adopting an ozone advanced oxidation technology, and the treatment system comprises an activated carbon reaction device, a denitrification reaction device, an ecological pond and a horizontal subsurface flow wetland; the activated carbon reaction device is communicated with the tail water pipe and comprises an activated carbon filtering layer, and the activated carbon filtering layer is used for adsorbing chemical oxygen demand and dissolved oxygen in tail water; the denitrification reaction device is communicated with the activated carbon reaction device and comprises a denitrification filter material layer, and the denitrification filter material layer is used for autotrophic denitrification nitrogen removal of tail water; the ecological pond is communicated with the denitrification reaction device and comprises aquatic plants and aquatic animals; the horizontal subsurface flow wetland is communicated with the ecological pond and is used for deeply filtering the tail water. The treatment system can improve the purification effect of the tail water of the sewage plant.

The application relates to the technical field of wastewater treatment, in particular to a device for comprehensively treating wastewater based on a high-level oxidation method, which comprises a base, a frame body slidingly arranged on the base, a treatment barrel rotatingly and sealingly arranged in the frame body through a first mounting ring, an electric cylinder arranged on the base and fixedly connected with the frame body at an output end, an air bag transversely arranged between the frame body and the base, a water inlet valve pipe arranged at one end of the treatment barrel, and a water outlet valve pipe rotatingly and sealingly arranged at the other end of the treatment barrel through a second mounting ring; the device is characterized in that the electric cylinder reciprocatingly slides, a rack drives a transmission assembly, then the treatment barrel is driven to rotate in the frame body through thread engagement, full stirring of the wastewater is realized through movement in two directions of the transverse direction and the axial direction, the air bag is driven to stretch and contract through relative movement of the frame body and the base, the wastewater is aerated, and the quality of the wastewater treatment is improved through multiple filtration of the filler ring plate.

The invention relates to the technical field of liquor industrial wastewater treatment, in particular to an advanced treatment system and method for liquor industrial wastewater. Comprising a water inlet pump, a quartz sand filter in pipeline connection with the water inlet pump, a self-cleaning filter in pipeline connection with the quartz sand filter, an ultrafiltration device in pipeline connection with the self-cleaning filter, an ultrafiltration water producing tank in pipeline connection with the ultrafiltration device, and a nanofiltration water feeding pump in pipeline connection with the ultrafiltration water producing tank, according to the present invention, the problem that the organic matter cannot be deeply and substantially removed after the biochemical treatment can be solved, and the separation treatment cost is low, and the high-cost treatment modes such as the advanced oxidation process such as Fenton do not need to be adopted so as to substantially reduce the production operation cost. According to the invention, blockages are backwashed to the micro-electrolysis device at the same time, so that the problem of blockage can be solved, and the centralized treatment efficiency of high-concentration pollutants causing blockage is also greatly improved.

The present application belongs to the technical field of wastewater treatment, and particularly relates to a method for treating organic phosphonic acid wastewater by using a supported copper monatomic catalyst, wherein persulfate and the supported copper monatomic catalyst are added into the organic phosphonic acid wastewater to degrade the organic phosphonic acid; the supported copper monatomic catalyst is a metal oxide loaded with copper monatomic atoms, wherein the loading amount of the copper monatomic atoms is 1-10 wt% of the total weight of the catalyst. Compared with the prior art, the present application solves the problem that metal ions cannot be recovered in the advanced oxidation process of the prior art in the treatment of organic phosphonic acid wastewater. The present application provides an advanced oxidation technology for organic phosphonic acid wastewater, realizes efficient and deep degradation of the organic phosphonic acid in the wastewater, can adapt to wastewater in a wide pH range, and has strong anti-interference and high selectivity after multiple degradation, with a very low metal leaching content (0.0015 mg / L).

Water treatment systems are disclosed. The system includes an electrochemical cell having an inlet and an outlet, a cathode comprising a catalytic material for electrochemical generation of persulfate free radicals, and an anode, a source of a persulfate positioned upstream of the electrochemical cell, first contaminant concentration sensor positioned upstream of the electrochemical cell, and a controller operatively coupled to receive one or more input signals from at least the first contaminant concentration sensor. Methods of treating water using the electrochemical cell disclosed herein are disclosed. Methods of facilitating water treatment by providing the electrochemical cell disclosed herein are disclosed. Methods of retrofitting a water treatment system having an AOP by providing the electrochemical cell disclosed herein are disclosed.

A process for the treatment of water, in particular for the treatment of waste water, in a treatment system having an inlet and an outlet, comprising the introduction of ozone into the water to be treated and the UV irradiation of the ozonated water within a reaction chamber, wherein hydrogen peroxide is produced by the UV irradiation of the ozonated water in the reaction chamber and wherein the amount of ozone used for the water treatment and / or at least one irradiation-related parameter of the UV irradiation are adjusted such that the treated water after the UV irradiation at the outlet of the treatment system contains i) hydrogen peroxide dissolved in the water in a mass ratio of hydrogen peroxide to introduced ozone in a range from 0.01 to 1.0, preferably in a range from 0.01 to 0.5, and ii) ozone dissolved in the water in a maximum amount of ≤ 0.1 mg / l.

The application discloses an ozone micro-nano bubble coupling ultraviolet oxidation wastewater treatment process, which comprises the following steps: filtered wastewater is pumped by a booster pump, and then sequentially passes through a micro-nano bubble jet device connected with an ozone generator and a flow-through ultraviolet lamp, and finally enters an oxidation contact tank; the wastewater in the oxidation contact tank is continuously circulated by the wastewater booster pump, and treated wastewater is discharged after COD reaches a standard. The ozone micro-nano bubble coupling ultraviolet oxidation wastewater treatment process has the advantages that the process is used for treating chemical industrial park wastewater by adopting the ozone micro-nano bubble technology coupling ultraviolet jet advanced oxidation process, ozone utilization rate is high, process conditions are mild, and the removal effect of wastewater COD is good, so the process has great potential in the field of wastewater treatment; the ozone micro-nano bubble coupling ultraviolet advanced oxidation process requires less hardware equipment and has low operation cost, so the process has a broad application prospect in the field of engineering wastewater treatment.

The present utility model relates to a sustainable, solar-powered facility for the treatment of medical waste and its conversion into pavement bricks. The facility comprises a medical waste input module, a size-reduction assembly including a double-shaft crusher and granulator, an underground transfer tank, sanitation tanks equipped with an Advanced Oxidation Process (AOP) system, a trommel-based separation system, a cement mixer, a screw conveyor, a hydraulic pavement brick making machine, and an underground water storage tank. In operation, medical waste undergoes size reduction and is transferred to the sanitation tanks, wherein the AOP system generates hydroxyl radicals to disinfect and oxidize contaminants. The treated waste is then separated into liquid and solid fractions, with the liquid component directed to the water storage tank for treatment and recycling, and the solid component blended with cementitious materials and formed into pavement bricks using the hydraulic machine. The facility is powered by a hybrid solar energy system configured to support continuous operation, including in off-grid or limitedaccess areas. The utility model provides an integrated solution for safe medical waste treatment and resource recovery.

The invention discloses a polyester printing and dyeing alkali-minimization wastewater pretreatment process which comprises the following steps: (1) roughly filtering alkali-minimization wastewater by adopting a fine grid to remove insoluble impurities; (2) conveying the roughly filtered wastewater to an adjusting tank, and collecting, averaging and homogenizing the wastewater; (3) conveying the alkali-minimization wastewater in the step (2) to a coagulative precipitation tank, adjusting the pH value of the wastewater to be neutral, and reacting the wastewater with the added coagulant aid and flocculant to remove SS (suspended solids) in the wastewater; (4) conveying the supernate obtained in the step (3) to an acid precipitation tank, continuously adjusting the pH value, carrying out an acid precipitation reaction, and realizing solid-liquid separation under the action of gravity; and (5) conveying the supernatant wastewater obtained in the step (4) to an iron-carbon micro-electrolysis tank and a Fenton oxidation tank, removing most pollutants in the wastewater by using an advanced oxidation process, and mixing the wastewater with other wastewater for subsequent treatment. The two-stage advanced oxidation process is adopted, the COD removal rate can reach 85% or above, the follow-up biochemical treatment load is effectively reduced, and the biodegradability of the wastewater is improved.

This invention discloses a composite catalyst, its preparation method, and its application in sludge treatment, belonging to the field of sludge treatment and environmental protection technology. The invention synthesizes an iron-carbon nanocomposite catalyst using ferric nitrate nonahydrate, antibiotic bacterial residue, and melamine as precursors. The resulting catalyst can, on the one hand, activate ammonium persulfate to generate free radicals that disrupt the water-locking structure of the sludge, enhancing its hydrophobicity and thus improving dewatering efficiency. On the other hand, the Fe species in the composite catalyst activates ammonium persulfate to form Fe... 3+ Fe 3+ The hydrolysis generates ferric hydroxide colloids that can adsorb sludge particles, neutralize surface charges, thereby reducing interparticle repulsion, promoting floc aggregation, and enhancing dewatering efficiency. The advanced oxidation process of ammonium persulfate catalyzed by iron-carbon nanocomposite catalysts also achieves the removal of antibiotic resistance genes from sludge.

INDUSTRIAL PROCESS FOR THE TOTAL DESTRUCTION OF POLLUTANTS IN GAS OR LIQUID COMPOUNDS BY CHEMICAL MODIFICATION. The invention relates to a process for the chemical modification of pollutants in a gaseous or liquid composition followed by their total destruction by an advanced oxidation process (AOP), for the treatment of any pollutant, alone or in a multi-pollutant mixture, selected from: - Alkali-sensitive inorganic compounds or those simply soluble in aqueous media. - Alkali-sensitive organic compounds or those simply soluble in aqueous media. A process for the chemical modification and total destruction of alkali-reactive pollutants, partially or totally water-soluble, present in a gaseous or liquid effluent has now been developed.

The invention discloses an environment-friendly artificial tree system for improving air pollution, which takes a boron-doped diamond (BDD) electrode, a titanium dioxide coated filter ball and an advanced oxidation process (AOP) as cores, realizes air purification by using easily available water and has a multi-scene adaptation function, and comprises a cylindrical hollow shell part fixed on the ground; the purified water tank part is arranged at the lower end of the shell part and quantitatively introduces and filters purified water; a BDD atomizing unit that electrolyzes the purified water by means of a BDD electrode to generate a disinfectant and atomizes the disinfectant; the pipeline fan module part is positioned above the BDD atomizing part and is used for conveying the vaporific disinfectant and introducing filtered external air; and the advanced oxidation reaction part is connected to the upper side of the pipeline fan module part and is used for sterilizing by using ultraviolet rays and decomposing macromolecular organic compounds through AOP. The system can remove fine particulate matters, oxidize and decompose nitrogen oxides, sulfur oxides and the like, kill viruses and improve the air quality.

The application relates to a preparation method of an iron-molybdenum bimetallic MOF derived catalyst and application of the iron-molybdenum bimetallic MOF derived catalyst in treatment of refractory organic wastewater by activated persulfate. The application is based on a transition metal activated persulfate (PDS) advanced oxidation process, and a magnetic recyclable iron-molybdenum bimetallic composite catalyst (Fe / Mo@C) is successfully prepared by a co-precipitation and calcination method. The Fe / Mo@C is a porous nanomaterial, has rich surface active sites, a large specific surface area, a simple synthesis process, superior performance, a wide pH action range, and has a good application prospect. In the present study, bisphenol A (BPA) is selected as a target pollutant, and the composite catalyst shows high reaction activity in removal of BPA, and 20mg / L BPA can be rapidly removed within 10min. The excellent performance is due to the synergistic effect of the molybdenum-iron bimetallic material, which accelerates Fe(II) / Fe(III), Mo(IV) / Mo(VI) double circulation, accelerates generation of SO4 · And ·OH by activation of PDS to rapidly further attack and decompose organic pollutants. The application provides a new idea for preparation of a new efficient catalyst and treatment of refractory organic pollutants by activated persulfate.

The application discloses a kind of high oxidation process catalysts for low-cost treatment of industrial organic wastewater and its preparation method and application, belong to environmental remediation material preparation and water pollution control field.The preparation of the catalyst is based on biochar, natural iron manganese mineral, first, after screening, natural magnetite and soft manganese ore are fully mixed in a certain proportion and are subjected to ball milling treatment, and the biochar doped with impurity elements is obtained by pyrolysis method, the impurity element doped biochar, iron manganese mineral composite catalyst is fully mixed, and then ball milling treatment is carried out under the protection of inert atmosphere, and the catalyst is obtained.The impurity element doped biochar contained in the catalyst promotes the aggregation of pollutants and electron transfer, and the iron manganese bimetallic elements can be used as active sites, and the synergistic effect between them significantly increases the activation efficiency and improves the degradation efficiency of pollutants.

The present application relates to the precise quantitative method of quenching agent in advanced oxidation treatment of sewage, comprising the following steps: S1: using the standard substance of the to-be-treated pollutant to prepare the to-be-tested pollutant mother liquor; S2: taking several portions of the to-be-tested pollutant mother liquor with the same volume, respectively adding different volumes of the quenching agent, and then forming several portions of the first to-be-tested liquid after constant volume; S3: taking the same volume of sample from the several portions of the first to-be-tested liquid for detection, and determining the maximum volume fraction of the quenching agent ensuring the detection accuracy; S4: taking several portions of the to-be-tested pollutant mother liquor with the same volume, respectively adding different volumes of the quenching agent, adding the catalyst and the oxidant, and then forming several portions of the second to-be-tested liquid after reaction; S5: controlling the sampling volume, determining the minimum volume fraction of the quenching agent required for terminating the oxidation reaction within the range of the maximum volume fraction of the quenching agent; and S6: actual sewage oxidation experiment, determining the addition amount of the quenching agent according to the maximum volume fraction of the quenching agent and the minimum volume fraction of the quenching agent.

The invention belongs to the technical field of wastewater treatment, and provides a hydroxyethyl and tungsten oxide co-modified graphite-phase C3N4 composite photocatalyst as well as a preparation method and application thereof. The composite photocatalyst is composed of graphite phase C3N4 and WO3 anchored to the graphite phase C3N4 through 2-hydroxyethyl, C atoms, not connected with hydroxyl, in the 2-hydroxyethyl are combined with N atoms of terminal amino or terminal imino of the graphite phase C3N4 to form C-N bonds, W atoms of WO3 are combined with O atoms of the 2-hydroxyethyl to form W-O bonds, and the W atoms of WO3 and O atoms of the 2-hydroxyethyl are combined to form C-N bonds. And the graphite phase C3N4 and WO3 are coupled through an interface W-O-C bond to form the S-schema heterojunction. According to the present invention, the OH generation efficiency of the existing graphite-phase C3N4-based catalyst can be improved, the photocatalytic advanced oxidation performance of the graphite-phase C3N4-based catalyst can be improved, and the organic pollutant degradation efficiency of the existing graphite-phase C3N4-based catalyst-driven advanced oxidation process can be improved.

The invention belongs to the field of degradation of antibiotics, and discloses a preparation method and application of a boron-nitrogen co-doped cobalt-based carbon material based on MOF derivation. On the basis of an in-situ generated cobalt-based carbon material, a nitrogen element is firstly introduced and then a boron element is further introduced, and the synthesized material is further applied to an advanced oxidation process based on persulfate to degrade sulfamethoxazole in a water environment. According to the boron-nitrogen co-doped cobalt-based carbon material prepared by the method, the problem of heavy metal ion leaching of an original single nonmetal cobalt-based carbon catalyst is solved, and the problems of poor reusability, insufficient durability and the like caused by heavy metal ion leaching of the original single nonmetal cobalt-based carbon catalyst are solved. Moreover, the activation capacity of the material on persulfate is promoted through secondary doping of nitrogen and boron, an oxidation process taking singlet oxygen as a main reactive oxygen substance is presented in a degradation system, and the material has relatively high adaptability to complex water environment conditions and can bear relatively wide environmental changes.

The invention discloses a black and odorous sludge conditioning dehydration method, and belongs to the technical field of black and odorous sludge conditioning, the method comprises the following steps: adjusting the initial water content of original black and odorous sludge to obtain diluted black and odorous sludge; sulfuric acid is added into the diluted black and odorous sludge to adjust the pH value, full stirring and mixing are conducted, the solution is kept in a stable acid environment, and acidified black and odorous sludge is obtained; fully stirring and mixing the acidified black and odorous sludge with ferrite to obtain black and odorous sludge subjected to ferrous treatment; and urea peroxide is continuously added into the black and odorous sludge treated by ferrous iron, stirring is performed, a full reaction is performed, and the conditioned black and odorous sludge is obtained. The method is suitable for dehydration reduction of the black and odorous sludge, a conditioning system for catalyzing oxidation of urea peroxide and strengthening aggregation by ferric salt is constructed to replace a traditional advanced oxidation process which is high in cost and poor in stability or has ecological risks, and technical reserve is provided for engineering application of black and odorous sludge treatment and disposal.

A method for removing recalcitrant contaminants uses an oxygen-nanobubble advanced oxidation process. Oxygen-nanobubble based advanced oxidation mineralized 1,4 dioxane in an aqueous solution, thereby removing practically all of the 1,4 dioxane. An added advantage is that the process does not form bromate. Also disclosed is an ozone-oxygen nanobubble based advanced oxidation process that removes recalcitrant contaminants. Ozone-oxygen nanobubble based advanced oxidation significantly increased the mass transfer rate compared to that of the micro-bubble technology.

The invention discloses a hollow fiber ceramic catalytic membrane, a membrane module reaction device and method and application, and belongs to the technical field of water treatment and membrane separation. A membrane separation layer with a catalytic function can be constructed by loading or fixing the nano-catalyst on the pore channels and the surface of the ceramic membrane in situ, and the membrane has the characteristics of excellent chemical stability, high temperature resistance, high pollution resistance, high mechanical strength, long service life and the like, and can tolerate a harsh chemical reaction environment in an advanced oxidation process. According to the hollow fiber catalytic membrane, spinel CoFe2O4 is used as a main active component, so that active oxygen species such as hydroxyl free radicals with strong oxidizing capacity are continuously generated, effective degradation of antibiotics is realized, and the technical problem that pollutants are difficult to effectively remove in an existing method is solved.

The invention discloses a preparation method of a catalyst for efficiently degrading tetracycline in an advanced oxidation process, and belongs to the technical field of sewage treatment.The preparation method comprises the steps that when the catalyst is prepared through the method, three transition metal salts of iron, copper and cobalt need to be used as precursors, and when the catalyst is prepared, the iron salt, the copper salt and the cobalt salt are added into deionized water to be stirred to form a mixed solution; then adjusting the pH value of the mixed solution to form a precipitate; and finally, putting the precipitate into a drying oven, and drying to obtain the FeCuCo-LDH catalyst. The used ferric salt can be FeCl3, Fe (NO3) 3 and Fe2 (SO4) 3; the copper salt can be CuCl2, Cu (NO3) 2 and CuSO4; the cobalt salt can be CoCl3, Co (NO3) 3 and Co2 (SO4) 3. The FeCuCo-LDH catalyst prepared by the method has an efficient PMS activation path constructed by a multi-dimensional synergistic mechanism, so that a catalytic system shows excellent reaction performance in an extremely short time, FeCuCo-LDH can realize rapid removal of tetracycline in a short time, good degradation efficiency and engineering applicability are shown, and the method is suitable for industrial production. The method is suitable for rapid treatment and purification of actual antibiotic-polluted wastewater.

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.

The application discloses a wastewater and waste gas treatment process for an acrylonitrile production device, and belongs to the technical field of wastewater and waste gas treatment. The process comprises the following steps: (1) a nitrile removal process: adding an alkaline substance into condensate of a four-effect evaporator to adjust the pH value, and reacting to obtain water discharged from the nitrile removal process; introducing first part of atmospheric discharge of an AOGI waste gas incineration system into the water discharged from the nitrile removal process to adjust the pH value; (2) a cyanide breaking process: the water discharged from the step (1) is introduced into a UV / H2O2 advanced oxidation process to react, and water discharged from the cyanide breaking process is obtained; introducing all atmospheric discharge of a WWI waste water incineration system and second part of atmospheric discharge of the AOGI waste gas incineration system into the water discharged from the cyanide breaking process to adjust the pH value; (3) the water discharged from the step (2) is sequentially treated by an A / A / O process and a biological filter EBF, and can be discharged up to the standard. The treatment process realizes waste treatment by waste, so that the wastewater and waste gas generated in the acrylonitrile production device can be stably discharged up to the standard, and carbon and nitrogen emission reduction of the acrylonitrile production device is realized.

The present application relates to the technical field of industrial wastewater treatment, and discloses a treatment method for grinding liquid wastewater of a grinding machine, comprising the following steps: pretreatment and demulsification, multistage chemical purification, biochemical advanced treatment, advanced purification and reuse, and sludge treatment; a specific supported heterogeneous catalyst is used in the multistage chemical purification step, the surface of the catalyst is constructed with a nano zero-valent iron and copper oxide composite active component, the efficiency and stability of free radicals in the advanced oxidation process can be enhanced, and a high-efficiency continuous removal system for heavy metal ions and refractory organic pollutants is formed in cooperation with an optimized composite coagulant in the coagulation and sedimentation step; meanwhile, a demulsifier composed of specific components in the pretreatment step realizes rapid demulsification of the emulsified oil phase in the grinding liquid wastewater through the synergistic effect of the components, creates favorable conditions for subsequent advanced treatment, and thus improves the purification efficiency and operation stability of the process as a whole.

The invention relates to the field of wastewater treatment, in particular to a preparation method of modified ion exchange resin and application of the modified ion exchange resin in thallium-containing wastewater. The modified ion exchange resin is ion exchange resin of which the surface is loaded with nano oxides of cerium with different valence states; wherein the nanometer oxides of cerium with different valence states are nanometer Ce (III) oxides and nanometer Ce (IV) oxides. Compared with the traditional ion exchange resin, the cerium oxide modified ion exchange resin disclosed by the invention can be matched with a hydrogen peroxide solution for use, combines the advantages of an advanced oxidation process and an ion exchange process, and overcomes the problems of high content of matrix ions, large fluctuation of water quality, high content of reducing ions and the like in thallium-containing industrial wastewater; and the method is more suitable for continuous and stable treatment operation of large-scale thallium-containing industrial wastewater.