322 results about "Oxidation response" patented technology

The invention relates to the technical field of industrial wastewater treatment, in particular to a heterogeneous catalytic oxidation process and system for treating organic wastewater. The heterogeneous catalytic oxidation system for treating the organic wastewater comprises an acid adjusting unit, a booster pump, a catalytic oxidation reaction unit and a pH callback pipeline mixer which are communicated in sequence, the catalytic oxidation reaction unit comprises a plurality of heterogeneous catalytic oxidation reactors which are connected in series, and the treatment temperatures and the treatment pressures of the heterogeneous catalytic oxidation reactors are sequentially reduced along the flowing direction of wastewater. The heterogeneous catalytic oxidation reactors connected in series in the system provided by the invention do not need to be pressurized step by step, are simple and efficient, and have feasibility. The heterogeneous catalytic oxidation reactors are adopted, so that the loss of the catalyst can be avoided, the continuous addition of the catalyst is not needed, the operation cost is reduced, meanwhile, the function of configuring different catalysts in each stage of heterogeneous catalytic oxidation reactor can be realized, and the degradation degree of organic matters and the precise regulation and control of each stage of target products are realized.

The invention belongs to the field of compositions of biomedical materials and high-molecular compounds, and provides hydrogel capable of regulating and controlling the redox steady state of a microenvironment as well as a preparation method and application of the hydrogel. A macromolecular network of the hydrogel capable of regulating and controlling the redox steady state of the microenvironment is formed by catechol modified hyaluronic acid, carboxylated chitosan, oxidized dextran and iron ions through a hybridization cross-linking reaction; under physiological conditions, catechol groups in the hydrogel can be subjected to an autoxidation reaction to generate H2O2, and meanwhile, iron ions coordinated on the catechol groups in the hydrogel can catalytically decompose H2O2 into water and oxygen, so that the level of active oxygen in a microenvironment is adjusted. The hydrogel disclosed by the invention can realize bidirectional regulation and control on active oxygen in a pathological microenvironment after myocardial infarction, so that the redox steady state of the pathological microenvironment after myocardial infarction is maintained, and the regeneration and repair capacity of an existing hydrogel material with antioxidant capacity on myocardial tissues after myocardial infarction is improved.

The invention relates to the technical field of wastewater treatment, in particular to a catalytic reduction-oxidation reaction system and a wastewater treatment method, and the catalytic reduction-oxidation reaction system is used for treating wastewater. Comprising a water inlet unit, a pH stabilizing unit, a catalytic reduction reaction unit, a Fenton oxidation reaction unit, an aeration stripping unit, a neutralization unit, a coagulating sedimentation unit and an intelligent control system which are connected in sequence, the catalytic reduction reaction unit comprises a catalytic reduction reactor, a filter plate and a reaction layer are arranged in the catalytic reduction reactor, a supporting layer is laid on the filter plate, and the reaction layer is arranged on the supporting layer. The reaction layer is arranged on the filter plate through the supporting layer; the Fenton oxidation reaction unit comprises a Fenton oxidation reactor, the Fenton oxidation reactor comprises a reactor body, and a first rotary mixing aeration disc is arranged at the bottom in the Fenton oxidation reactor. By implementing the application, high-efficiency, stable, low-consumption and intelligent operation of wastewater treatment can be realized.

The invention relates to a microfluidic reactor for electrocatalytic determination of chemical oxygen demand, and belongs to the field of environmental monitoring. In the reactor, to-be-detected samples are injected from a sample inlet positioned at the front end of a liquid inlet and flow into the reactor formed by stacking three layers of components from the liquid inlet below along with electrolyte, and the to-be-detected samples positioned at different horizontal heights turn along with liquid flow and finally reach the surface of a planar anode at the bottom under the action of a pinch plate distributed with a micro cone group; and the water flows upwards through a hole in one end of the top side of the buckle plate, passes through the auxiliary electrode with the hole and finally flows out of the electrolytic tank through a water outlet in the top. Organic matters in the to-be-detected sample are subjected to electrochemical oxidation reaction under the action of the catalyst on the surface of the planar anode at the bottom of the reactor, and a generated electric signal is used for quantitatively determining the chemical oxygen demand of the to-be-detected water sample. In the invention, the pinch plate distributed with the micro cone group can strengthen organic matters to break through stable horizontal laminar mass transfer, so that the organic matters in the sample to be detected fully reach the surface of the plane anode to generate electrochemical oxidation reaction, thereby improving electric signals and lower limit of detection. According to the characteristics, a more stable and accurate electric signal can be obtained when the reactor is used for measuring the chemical oxygen demand, and the linear range of the measurement is widened, so that the efficient and accurate measurement of the chemical oxygen demand in a sample to be measured is realized.

The invention discloses a gas-liquid reaction system. The gas-liquid reaction system comprises a wastewater pool, an ozone generator, an oxidation reaction tank and a first micro-interface generator located in the oxidation reaction tank. An inlet of the first micro-interface generator is communicated with the wastewater pool and the ozone generator, and an outlet of the first micro-interface generator is communicated with the inside of the oxidation reaction tank. Therefore, wastewater in the wastewater pool and ozone produced by the ozone generator can be simultaneously conveyed to the first micro-interface generator, the wastewater and the ozone oppositely run in the first micro-interface generator to crush and disperse the ozone into micron-sized ozone micro-bubbles, and the mass transfer area between the ozone micro-bubbles and the wastewater in the oxidation reaction tank can be increased by the ozone micro-bubbles; the oxidation reaction between the ozone and the wastewater is promoted, so that the utilization rate of the ozone is improved. As the oxidation reaction tank is communicated with the wastewater pool, unreacted ozone in the oxidation reaction tank can be conveyed into the wastewater pool to oxidize wastewater, so that the unreacted ozone is fully utilized, and zero emission of ozone is realized.

The utility model relates to a steam stripping oxidation tank suitable for removing organic matters in high-salt organic wastewater, and belongs to the technical field of environmental protection equipment. A steam stripping oxidation tank body is composed of a cylinder body, an upper sealing head and a lower sealing head, the interior of the upper sealing head is a steam stripping area after demisting and defoaming, the interior of the cylinder body is a steam stripping, adsorption and oxidation reaction area, organic matter removal of high-salinity organic wastewater is achieved in the area, and the interior of the lower sealing head is a temporary storage area of the high-salinity wastewater after organic matter removal. The device disclosed by the utility model is simple in structure, is integrally of a detachable structure, is convenient to inspect and maintain, and realizes high-efficiency removal of organic pollutants in high-salt organic wastewater by an integrated process of oxidation, adsorption and steam stripping technologies.

The invention provides a method for reducing CH4 emission of a constructed wetland, the constructed wetland and a construction method of the constructed wetland, and particularly relates to the technical field of environmental protection. The method for reducing the CH4 emission of the constructed wetland comprises the following steps: doping biochar-loaded nano zero-valent iron into an upper-layer matrix of the constructed wetland; the doping amount of the charcoal-loaded nano zero-valent iron is 0.5-2% of the mass of the upper-layer substrate. According to the method, the concentration of soluble organic carbon (DOC) in the constructed wetland is improved by controlling the content of the biochar-loaded nano zero-valent iron, so that the diversity of CH4 oxidizing bacteria and the relative abundance of Guangmethylotrophicus are improved, the CH4 oxidation reaction is promoted, and finally the emission reduction of CH4 is realized. According to the data of the embodiment, the average discharge flux of CH4 of the constructed wetland prepared by the invention is 0.22-0.35 mg.C / m < 2 > / h, and is reduced by 35.6-59.8% compared with the contrast.

The invention discloses an organic wastewater advanced treatment method and device with low agent input. The method comprises the following steps: an anaerobic biological iron-sulfur reduction reaction process: fully mixing elemental sulfur, ferric iron, iron-sulfur reduction sludge and wastewater containing organic carbon and organic pollutants with electronegative groups, carrying out anaerobic biological elemental sulfur reduction and iron reduction reactions, and directionally generating polysulfide and ferrous sulfide in situ; a nucleophilic substitution reaction process: carrying out nucleophilic substitution reaction on the organic pollutants with the electronegative groups and the polysulfide, and removing the electronegative groups to generate a reduced organic product; in the oxidation reaction process, ferrous sulfide reacts with dissolved oxygen to generate hydroxyl free radicals, the reduction state organic product is oxidized and degraded, and elemental sulfur and ferric iron are generated; and a sludge precipitation process: refluxing the precipitate to the anaerobic biological iron-sulfur reduction reaction zone, and discharging clarified water. The method provided by the invention realizes deep degradation and detoxification of refractory organic pollutants, and has the advantages of low agent investment, low cost and no secondary pollution.

The invention discloses a seawater chemical oxygen demand determination method based on bias voltage photoelectric oxidation, and relates to the technical field of water quality monitoring. The method comprises the following steps: collecting seawater and performing pretreatment to obtain a seawater sample; adding supporting electrolyte into the seawater sample to obtain an electrolytic water sample; the method comprises the following steps: injecting an electrolysis water sample into a photoelectrochemical reaction tank, applying bias voltage to a working electrode by taking Ag / AgCl as a reference electrode, and turning on a light source with a specific wavelength for irradiation; carrying out an oxidation reaction in the photoelectrochemical reaction tank, and after the oxidation reaction of the organic matter is complete, obtaining a steady-state photocurrent with a stable current signal; according to a preset steady-state light current-COD concentration curve, a COD measured value is obtained, the COD standard concentration value is corrected according to the water temperature and the salinity, and a COD corrected value is obtained. An adjustable tiny external bias voltage is introduced to cooperate with light source irradiation, so that rapid, accurate and high-anti-interference measurement of COD in seawater is realized.

The invention relates to a phosphorus-doped spinel oxide, a preparation method and application of the phosphorus-doped spinel oxide in a glucose oxidation reaction, and belongs to the technical field of electrolytic catalytic materials. According to the invention, a P-NiMoO4 / NF self-supporting electrode is prepared by using P-doped NiMoO4 (beta) on Ni foam (NF). The structure of NiMoO4 is stabilized, the density state of active site Ni atoms close to Fermi level (EF) and the activity near oxygen vacancy (V0) are increased, the oxidation potential and the low detection limit are reduced, and the sensitivity and the linear detection range of glucose are increased.

The invention provides a livestock oxidative stress reaction prediction method and system, and the method comprises the steps: obtaining a real-time physiological monitoring data set with a timestamp mark of a livestock group, carrying out the feature extraction of the real-time physiological monitoring data set, and obtaining a target physiological index feature reflecting an oxidative stress state, the target physiological indexes comprise metabolic activity characteristics, oxidation product accumulation characteristics and anti-oxidation response characteristics. Calling a pre-training model to carry out time sequence correlation analysis on the target physiological index features, and generating an oxidative stress state prediction sequence; and determining a target individual with oxidative stress reaction and reaction development stage information according to the prediction sequence, and finally generating an oxidative stress reaction prediction result for the target individual. Therefore, the oxidative stress reaction of the livestock and poultry can be accurately predicted in real time.

The invention provides an up-to-standard treatment method for wastewater containing ammonia nitrogen and difficult-to-treat copper-cyanogen, and belongs to the field of wastewater treatment.The wastewater enters a first-stage oxidation reactor at first, the stable structure of a copper-cyanogen complex is destroyed by adding an oxidizing agent, then a copper removal agent and a pH adjusting agent are added into a copper removal reactor, copper ions are precipitated and separated out, and then the wastewater enters a second-stage oxidation reactor; the method comprises the following steps: carrying out oxidation and solid-liquid separation to remove copper sludge, carrying out oxidation and solid-liquid separation on treated overflow liquid and press filtrate after convergence so as to thoroughly remove residual cyanide and organic matters, and finally, conveying purified liquid which is subjected to two-stage oxidation and is subjected to copper cyanide interference removal to a biological reaction system to carry out biochemical reaction. And finally, the effluent reaches the recycling or discharging standard. The method effectively solves the problem of toxicity inhibition of difficult-to-treat wastewater on a biochemical system, realizes step-by-step removal and resource utilization of toxic and harmful substances, ensures stable and up-to-standard reuse or discharge of effluent, and has the advantages of efficient treatment, economy, environmental protection and convenient operation.

The present invention proposes a water treatment system that couples anoxic biofilters with artificial wetlands, belonging to the field of water treatment technology. The key technical points are: sewage is collected through a pipe network and flows into a water collection pool, and then enters a regulating / anoxic pool through a lift pump. The solid carbon source in the pool provides a carrier for microorganisms while achieving slow-release supplementation of the carbon source, thereby strengthening the denitrification reaction to remove total nitrogen. The system is then transported to a biofilter and a contact oxidation pool by a lift pump, and COD and ammonia nitrogen are removed through carbon oxidation and nitrification reactions. The effluent enters a high-efficiency clarifier, and after most of the total phosphorus and SS are removed through chemical phosphorus removal and coagulation and sedimentation, the overflow enters an artificial wetland, and is subjected to a comprehensive treatment of plant-microorganism-filler to deeply purify the pollutants and meet the discharge standards. Using the water treatment method of the present application, the effluent water quality can be improved to the Class B emission standard.

The invention discloses a method for preparing epsilon-caprolactone by a peroxy acid oxidation method, and relates to the field of organic chemical synthesis. The method specifically comprises the following steps: preparation of peroxy acid, Baeyer-Villiger oxidation reaction of peroxy acid and cyclohexanone, and separation and purification of a product. Peroxy acid generated by organic acid and hydrogen peroxide is used as an oxidizing agent, and a metering pump is adopted to accurately control the raw material proportion. The method has the advantages of simplicity and convenience in operation, mild reaction conditions and high yield, and is suitable for industrial production.

The invention provides a lepidolite flotation wastewater treatment device and a flotation process, and relates to the technical field of wastewater treatment, the lepidolite flotation wastewater treatment device comprises an oxidation reaction tank, a multi-point feeding mechanism and a swing mechanism; the multi-point feeding mechanism comprises a mounting plate, a liquid outlet pipe and a two-way threaded screw rod, the two sides of the mounting plate are fixedly connected with the inner wall of the oxidation reaction tank, a sliding rail is fixedly arranged at the top of the mounting plate, and a moving seat is slidably connected to the surface of the sliding rail. According to the scheme, when the amidoxime lepidolite-containing flotation wastewater is treated, ferrous sulfate and hydrogen peroxide are added into the flotation wastewater, so that oximido and amino of amidoxime are destroyed, complexed heavy metals are released, macromolecular organic matters are degraded, the heavy metals are ensured to be completely free, and the heavy metals in effluent are prevented from exceeding the standard; in addition, the hydrogen peroxide is gradually added in a multi-point mode, bumping caused by local over-concentration is avoided, inner side spraying is adopted during spraying, and bumping of the liquid level due to the fact that the hydrogen peroxide is directly sprayed downwards and settles to the bottom of the pool under the action of gravity is avoided.

The oxidation reaction device comprises a reaction kettle, a stirring mechanism, a paddling mechanism and an oscillating mechanism which are used for homogenizing reaction materials are arranged in the reaction kettle, and a driving mechanism is arranged on the reaction kettle; the stirring mechanism comprises an impeller and a plurality of stirring blades, the paddling mechanism comprises a plurality of blades, the driving mechanism is used for driving the impeller and the stirring blades to rotate and drive the blades to swing, the impeller and the stirring blades stir reaction materials through self rotation, and the blades push the reaction materials to flow circularly through self swing. The oscillating mechanism comprises a plurality of elastic pieces arranged on the oscillating path of the blades, and the blades generate vibration by shifting the elastic pieces so as to oscillate the reaction materials. When the reaction kettle is used for oxidation reaction, materials can be fully and effectively homogenized and dispersed by stirring, stirring and vibrating the materials, so that a reaction substrate, an oxidizing agent and a catalyst are fully contacted, and the product conversion rate and yield brought by the reaction are higher.

This invention relates to the field of industrial wastewater treatment technology, and discloses an electrocatalytic oxidation device and its operating method for treating saline industrial organic wastewater. Wastewater enters the reaction chamber through the bottom inlet, is forced through the anode channels, and undergoes an electrochemical oxidation reaction on the anode surface to convert chloride ions into hypochlorous acid. A vacuum ultraviolet light source performs in-situ photolysis of water molecules and hypochlorous acid, exciting various active species, including strongly reducing hydrated electrons, strongly oxidizing hydroxyl radicals, and chloride radicals. This device, through the construction of a reduction-oxidation system, can efficiently degrade various pollutants with both electron-rich and electron-deficient characteristics. This invention utilizes the synergistic coupling of electrochemical generation and photochemical conversion to convert high-concentration chloride ions into active precursors, effectively overcoming the bottlenecks of low degradation efficiency and poor selectivity in traditional technologies for high-salt and complex water quality, and significantly improving the system's mineralization efficiency and energy utilization rate.

The application discloses a process method for zero discharge of ethylene alkali residue wastewater, which comprises a wet oxidation section, a biochemical section and a salt treatment section; the wet oxidation section comprises a heat exchange unit, a wet oxidation reactor, a cooler and an adjusting tank; the biochemical section comprises an electrodialysis I, aerobic biochemical treatment, ozone catalytic oxidation, anaerobic biochemical treatment, secondary biochemical treatment, a recycled water pool and a methane purification unit; the salt treatment section comprises a tubular microfiltration, an electrodialysis II, a decarbonizer, a salt separation system, a biological reactor and a reverse osmosis; wherein the modified anion exchange membrane used in the electrodialysis has the characteristics of strong anti-pollution ability and high ion exchange rate, can effectively realize the separation of salt and organic matters in the wet oxidation effluent of the ethylene alkali residue, solves the problem of difficult treatment of the organic matters in the wet oxidation effluent of the ethylene alkali residue, and finally realizes zero discharge.

The invention discloses a pyrolysis gas-assisted thermochemical cycle hydrogen production test system and an operation method. The test system comprises a steam system, a gas path system, a reaction system and a separation detection system. The reaction system adopts a first reaction system and a second reaction system which are arranged in parallel and can alternately carry out reduction and oxidation reactions. And the gas path system can selectively introduce pyrolysis gas or nitrogen into the reaction system through valve switching. According to the operation method, by optimizing water vapor oxidation conditions, an air oxidation stage in a traditional process is omitted, and energy consumption is reduced; and nitrogen purging is adopted during switching of the reaction stages, so that the explosion risk is thoroughly eliminated, and the safety is guaranteed. According to the invention, continuous, efficient and safe circulating hydrogen production is realized, and a reliable scheme is provided for industrial application.

The utility model relates to the technical field of micro-arc oxidation reaction equipment, in particular to a micro-arc oxidation reaction device which comprises a support, a reaction cabin and a sealing cover, the reaction cabin is installed on the upper surface of the support, the sealing cover is installed on the upper surface of the reaction cabin, and a stirring mechanism is arranged on the upper surface of the sealing cover. A stirring part of the stirring mechanism is located in the reaction cabin, a jacking mechanism is arranged on the upper surface of the support, a moving part of the jacking mechanism is fixedly connected with the upper surface of the sealing cover, a distribution box is installed on the side surface of the support, and an assisting assembly is arranged on the upper surface of the support. According to the reaction device disclosed by the utility model, by arranging the assisting assembly and the locking assembly, when a user uses the equipment, the stirring structure of the equipment can leave right above the reaction device, so that the interference of the stirring structure on the taking operation when the user takes a workpiece is reduced, and the practicability of the reaction device is further improved.

The utility model relates to the technical field of environmental protection equipment, and discloses a rapid sewage oxidation and digestion system which comprises a sewage tank, a mixer, a mixed impact oxidation reactor, an oxidation tower and a clear water tank, a sewage pump is arranged between the sewage tank and the mixer, a water inlet of the sewage pump is communicated with a water outlet of the sewage tank, and a water outlet of the sewage tank is communicated with a water outlet of the oxidation tower. A water outlet of the sewage pump is communicated with a first inlet of the mixer, an outlet of the mixer is communicated with a water inlet of the mixed impact oxidation reactor, a water inlet of the oxidation tower is communicated with a water outlet of the mixed impact oxidation reactor, and the clear water tank is communicated with the oxidation tower; the device further comprises a multi-ion generator and a circulating water pump, the multi-ion generator is communicated with the mixer, and the circulating water pump is communicated with the oxidation tower and the mixer. The sewage treatment device is suitable for treating sewage containing toxic and harmful organic matters, can quickly digest toxic and harmful matters in the sewage, and solves the problem of secondary pollution of the sewage.

The invention discloses a method for removing diatom through combination of pre-oxidation of sodium hypochlorite and potassium permanganate and coagulative precipitation enhancement, and belongs to the technical field of water treatment. The method comprises the following steps: adding sodium hypochlorite and potassium permanganate into diatom-containing water step by step, and carrying out a combined pre-oxidation reaction for 30-60 minutes; and then adding a coagulant to react, and standing and precipitating for about 60 minutes, so that the diatom cells in the water can be efficiently removed. Aiming at the problems of low diatom oxidation removal rate, poor coagulation effect, filter tank blockage and the like in a conventional water treatment process, straight-chain diatom cell membrane structures are primarily destroyed through sodium hypochlorite, negative electricity groups on cell surfaces are exposed, and a favorable reaction interface is provided for potassium permanganate; in-situ manganese dioxide generated by further adding potassium permanganate can coat cells and neutralize surface charges, and an ideal condition is created for the coagulant to form an adsorption bridge, so that a coagulation interface is remarkably improved, and the removal efficiency of diatom cells is improved.

The utility model relates to the technical field of industrial wastewater treatment, and discloses a multi-stage catalytic ozonation industrial wastewater treatment device, which is characterized in that a plurality of treatment cavities are arranged in a shell and comprise a first-stage treatment cavity, a second-stage treatment cavity and a third-stage treatment cavity which are respectively positioned below a partition plate I, a partition plate II and a partition plate III. And each partition plate is provided with an overflow pipe and an ozone generator. The multi-stage treatment cavity can realize stage-by-stage treatment of the wastewater, so that ozone is in full contact with pollutants in the wastewater, and the treatment efficiency and the treatment effect are improved. Ozone generators are mounted in all stages of treatment cavities, so that ozone can be uniformly distributed in each treatment stage, and the oxidation reaction is further enhanced. Besides, the arranged on-line monitoring module can monitor key indexes in the wastewater in real time, such as COD (chemical oxygen demand), BOD (biochemical oxygen demand) and pH value, so that accurate control and optimization of the treatment process are realized.

The invention relates to an advanced oxidation and sulfur circulation coupled wastewater treatment system and method with wastewater advanced treatment, the advanced oxidation system comprises a first feeding pump, a first UASB reactor and a first feeding device, the first feeding pump is used for conveying to-be-treated wastewater to the first UASB reactor, and the first feeding device is used for conveying the to-be-treated wastewater to the second UASB reactor; the first feeding device is used for adding an advanced oxidation reactant into the first UASB reactor so as to carry out advanced oxidation reaction in the first UASB reactor; the sulfur circulation biological denitrification system comprises a second feeding pump, a second UASB reactor, a dissolving water tank and a second feeding device, the second feeding device is used for adding reaction materials into the dissolving water tank, and the second feeding pump is used for conveying treated wastewater from the dissolving water tank to the second UASB reactor; the treated wastewater and the reaction bacteria in the second UASB reactor are subjected to a sulfur cycle biological denitrification reaction; the efficient and economical treatment on the wastewater containing pollutants such as complex-state metals and nitrogen oxides is realized.

The application discloses an oxidation reaction system and a control method thereof. The oxidation reaction system comprises a first oxidation reaction kettle, a first detection module and a first control module. The first detection module acquires a first oxidation reaction kettle temperature of the first oxidation reaction kettle and / or a first tail oxygen concentration of a first tail gas output end of the first oxidation reaction kettle, and outputs an air set value to the first control module according to the first oxidation reaction kettle temperature and / or the first tail oxygen concentration. When the air set value is reduced, the first control module first reduces a first air feed flow rate, and then proportionally reduces a reactant feed flow rate. In the application, when an abnormal working condition occurs, the first air feed flow rate is first reduced, so that the oxidation reaction kettle is prevented from being overheated or internally exploded. Meanwhile, the reactant feed flow rate is proportionally reduced, so that qualified products can still be obtained after the air feed flow rate is reduced, and the loss of the production process caused by directly stopping the production process in the abnormal working condition is avoided.

The invention relates to the technical field of industrial wastewater treatment, and discloses an advanced oxidation-biological coupling treatment method and system.The method comprises the steps that after the pH value of wastewater is adjusted to be 3-5, Fenton oxidation and photocatalytic oxidation treatment are synchronously conducted in an oxidation reaction tower, the concentration of ferrous sulfate is controlled to be 8-12 mmol / L, the adding amount of hydrogen peroxide is controlled to be 40-60 mg / L, and the pH value of the wastewater is adjusted to be 3-5; irradiating with a 0.4-0.6 W ultraviolet light source, and reacting for 8-16 hours; the pressure is monitored in real time in the process, and safety pressure relief protection is set; after oxidation treatment, the pH value of the wastewater is adjusted to 6.5-8.5, biodegradation is conducted through a fluidized bed or a membrane bioreactor, the air flow of the fluidized bed is controlled to be 1-2 m < 3 > / h, and the membrane bioreactor is subjected to gas-water combined backwashing with the period of 4-12 hours; and finally, the effluent is recycled or discharged after being monitored to reach the standard. The system comprises an adjusting unit, an advanced oxidation unit, a biological treatment unit and an intelligent control unit which are sequentially connected. According to the invention, efficient decomposition and deep purification of refractory organics are realized, the treatment efficiency is high, the operation is stable, and the safety is good.

Provided is a method for producing furan-2,5-dicarboxylic acid, the method comprising: an oxidation step 1 for performing an oxidation reaction by continuously supplying 5-methylfurfural and an oxygen-containing gas under a supply condition 1 or 2 in the presence of a lower aliphatic carboxylic acid, a bromine compound, and a metal catalyst; and an oxidation step 2 for performing an oxidation reaction under a supply condition in which the oxygen concentration of the oxygen-containing gas and / or the molar ratio of oxygen in the oxygen-containing gas to the 5-methylfurfural is greater than those in the oxidation step 1. In the supply condition 1, the oxygen concentration of the oxygen-containing gas is 10 vol% or more and less than 15 vol%, and the molar ratio of oxygen in the oxygen-containing gas to the 5-methylfurfural is 2.5-4.2. In the supply condition 2, the oxygen concentration is 15-30 vol% and the molar ratio is 1.0 or more and less than 2.5.

The application relates to the technical field of nanofiltration membrane processing, in particular to a modification and recycling method of waste nanofiltration membranes, which comprises the following steps: 1) cyclic normal-temperature cleaning of the nanofiltration membranes by using alkaline agents or acid agents in combination with ultrasonic waves, and the cleaned nanofiltration membranes are washed clean by using deionized water or distilled water; 2) oxidation modification treatment in an oxidation reaction device by using an ozone oxidation method; 3) oxidation modification by using an oxidation agent in a modification device; 4) oxidation modification by using an acid medium oxidizing agent in the modification device; 5) hydroxylation modification by using a hydroxylation agent in the modification device; 6) modification and stabilization treatment by using a buffer stabilizing agent, and washing clean, so as to complete the modification and recycling treatment of the waste nanofiltration membranes. According to the modification and recycling method, the waste nanofiltration membranes can be utilized, the modification process is relatively simple, the membrane surface is not damaged after modification, the nanofiltration membrane flux is significantly improved after modification, and the interception rate meets the design and use requirements.

The invention relates to a method for measuring the metal content of MLCC electrode slurry. The method comprises the following steps: acquiring the mass m1 of an electrode slurry sample; carrying out glue discharging operation on the electrode slurry sample in a non-oxidation environment, and removing organic matters in the electrode slurry sample to obtain the mass m2 of the electrode slurry sample after glue discharging; putting the electrode slurry sample into an oxidation reactor, introducing air into the oxidation reactor, and heating the electrode slurry from room temperature to a set oxidation reaction temperature range for oxidation; the mass m3 of the oxidized electrode slurry sample is obtained, and the mass difference mx before and after the oxidation reaction is obtained according to the difference value between the mass m2 and the mass m3; according to the molar mass relation between oxygen in the oxidation reaction and metal in the electrode slurry sample, the mass difference mx is converted to obtain the mass m4 of the metal consumed in the oxidation reaction, the method can accurately measure the actual metal content in the electrode slurry, the defects in the prior art can be overcome, and the performance and the production yield of the MLCC are improved.

The invention provides a device and a method for preparing 2, 6-naphthalic acid. The device comprises an oxidation reactor for carrying out oxidation reaction on acyl naphthalene, a catalyst and air in a solvent, at least two crystallizing tanks for crystallizing and purifying products of the oxidation reaction, and a rectifying tower for carrying out distillation separation on water, the solvent and impurities, the oxidation reactor is a full-backmixing double-sleeve bubbling bed reactor; all the crystallizing tanks are connected with the oxidation reactor, the softened water source and the filter; the rectifying tower is connected with the filter and the oxidation reactor, and the rectifying tower is a continuous efficient filler rectifying tower. According to the device for preparing the 2, 6-naphthalic acid, the full-backmixing double-sleeve bubbling bed reactor is used, the purity and yield of products are ideal, through reasonable system configuration and technological process design, whole-process continuous production can be achieved, and the production efficiency is high.