153 results about "Fenton oxidation" patented technology

The invention discloses a quality-divided treatment and recycling method for lead-zinc beneficiation wastewater, and belongs to the technical field of beneficiation wastewater treatment.The method comprises the steps that beneficiation tail water is introduced into a Fenton reaction tank, a catalyst is added firstly, then hydrogen peroxide is added, a Fenton oxidation reaction is conducted, after the Fenton oxidation reaction is finished, the beneficiation tail water is introduced into a coagulation reaction tank, caustic soda liquid is added, and the mixture is stirred and mixed uniformly; adding a precipitating agent, a flocculating agent and a stabilizing agent, and flocculating and settling the precipitate; introducing the beneficiation tail water added with the treatment agent into a honeycomb inclined tube sedimentation tank, further flocculating and settling, then returning flocculated precipitates in a bottom tank to a coagulation reaction tank, and discharging redundant bottom mud into a tailing pond; and settled clear water enters a clear water tank and is used as production water for ore grinding classification and flotation operation. According to the invention, through quality-divided treatment-quality-divided recycling of the beneficiation wastewater, it is ensured that the beneficiation tail water meets the requirements of ore grinding and flotation production indexes, the treatment cost of concentrate overflow water and filtered water is reduced, and the purpose of 100% recycling of the beneficiation wastewater after quality-divided treatment is achieved.

The invention provides a technical application method for strengthening oxidation performance of Fenton reaction by a defect-rich carbon-based cocatalyst, and relates to the technical field of advanced oxidation catalysts for sewage treatment. Zinc nitrate and 2-methylimidazole are assembled in a methanol solution through a template method, a ZIF-8 material is obtained after centrifugal cleaning, the ZIF-8 is further carbonized through pyrolysis, Zn element is evaporated in the pyrolysis process, a porous and defect-rich carbon-based cocatalyst is obtained, the porous and defect-rich carbon-based cocatalyst is introduced into a Fenton oxidation system, circulation of Fe < 3 + > / Fe < 2 + > in the Fenton reaction can be efficiently promoted, and the catalytic activity of the catalyst is improved. Fe < 2 + > regeneration is enhanced, and the generation capability of active species of a Fenton reaction system is enhanced, so that the removal efficiency of pollutants in water 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 the technical field of water treatment, in particular to a nanofiltration membrane integration process for treating leachate of a garbage transfer station and a flocculating agent for a pretreatment section of the nanofiltration membrane integration process. According to the flocculating agent, the efficient composite flocculating agent is generated in situ through the cooperation of the ionic liquid grafted diatomite and the sulfonate modified branched polyamide cross-linked substance and the combination of the aluminum salt and the ferric salt, so that rapid removal of multiple pollutants and enhancement of floc stability are realized, and the follow-up membrane blockage risk is remarkably reduced. According to the process, an innovative pretreatment-graded nanofiltration-deep purification mode is adopted, membrane types of nanofiltration sections are optimized and screened according to pollutant characteristics, flexible combination of molecular step filtration, terminal combined light-Fenton oxidation, compact nanofiltration or reverse osmosis is realized, and efficient reduction of COD (Chemical Oxygen Demand) and salt content and energy consumption control are taken into consideration. The process has the advantages of stable effluent quality, low membrane pollution and greatly reduced medicament and operation cost, adapts to different emission standards, and has significant engineering application value.

The invention belongs to the technical field of electroplating wastewater treatment, and particularly relates to acidic electroplating wastewater treatment equipment and process based on combination of Fenton oxidation and acid-resistant nanofiltration membrane separation. Considering that the acidic nickel plating wastewater not only can provide acidic conditions, but also has ferrous ions, based on this, the acidic nickel plating wastewater is used as a raw material and is mixed with the ferrous ions and hydrogen peroxide for a Fenton reaction, and then iron ions and nickel ions are separated by adopting a PP precision filter and an anti-high-turbidity ultrafiltration system. According to the method, iron ions are recycled after being reduced by an iron reduction reactor, nickel ions are separated by adopting an acid-resistant nanofiltration system, and the obtained nickel ions are subjected to electroplating and water recycling again, so that the technical defects existing in the traditional nickel plating wastewater treatment are overcome, and the utilization of the acidic nickel plating wastewater is realized.

The invention discloses a firework and cracker hazardous waste recovery treatment method and system, and the method comprises the following steps: a wastewater treatment step: the wastewater treatment step comprises a chemical precipitation step, an A2O biochemical treatment step, a Fenton oxidation step and a BAF biological filter step, and perchlorate, COD and heavy metal are removed; the waste residue treatment step comprises a wet grinding step, a high-temperature digestion step, a flotation step, a hydraulic cyclone separation step, a wet leaching step and a fractional precipitation step, and carbon powder, titanium, barium, aluminum and magnesium resources are recycled; according to a synergistic coupling mechanism, bottom slag generated in the wastewater treatment step is conveyed to the waste slag treatment step for treatment, and filtrate generated in the waste slag treatment step is conveyed to the wastewater treatment step for treatment. The method is used for carrying out harmless treatment and resource recycling on the hazardous wastes of the fireworks and crackers.

The present application relates to a kind of methods for removing heavy metal complex in wastewater, comprising the following steps, S1 configuration PMS composite reagent, the PMS composite reagent is made by including the following weight percentage of raw material ball milling, persulfate 50~90%, sulfite 5~30%, hypochlorite 5~20%;S2 in the heavy metal complex-containing industrial wastewater join the PMS composite reagent obtained in the S1, heavy metal in heavy metal complex is Cu, and one or several of Co, Cr, Ni, Pb and Zn, complex in heavy metal complex is one or several of EDTA, NTA, citric acid, oxalic acid, tartaric acid, sorbic acid, stirring is dissolved, and lye is added to maintain the pH of industrial wastewater to 9.5~11.0, and carries out fenton-like oxidation and breaks the complex reaction, after reaction, aftertreatment is obtained, and the regenerated water is obtained.The present application achieves the purpose of removing heavy metal complex in wastewater by the method of in-situ activation of persulfate without additional catalyst or the application of electricity, ultraviolet and other energy.

The application discloses a preparation method and application of blue-green algae-based biochar with Fenton-like oxidation function. The preparation method comprises the following steps: (1) selecting an iron-containing flocculant, adding the iron-containing flocculant into natural lake water containing blue-green algae, and then performing sufficient stirring, standing, filtration, drying, crushing and sieving to obtain blue-green algae powder; (2) placing the blue-green algae powder in a tubular furnace for pyrolysis treatment to obtain preformed carbon; then, immersing the preformed carbon in an activating agent solution, performing sufficient immersion, drying, placing the preformed carbon in the tubular furnace for activation treatment, and finally performing heat treatment under air atmosphere to obtain blue-green algae-based biochar material with Fenton-like oxidation function. The application provides application of the prepared blue-green algae-based biochar in dye wastewater treatment, and the dye wastewater treatment is performed in the presence of hydrogen peroxide, and the blue-green algae-based biochar has high degradation removal rate and high stability.

The application discloses a method for recovering nickel and phosphorus from electroless nickel plating waste liquid, and the method comprises the following steps: preparing nickel sulfate through extraction and stripping, and preparing iron phosphate through Fenton oxidation and precipitation; compared with the prior art, the method is characterized in that the waste liquid is pretreated, insoluble solid particles in the waste liquid are removed, emulsification of an extractant caused by particles in a subsequent extraction process is prevented, damage to extraction oil is avoided, and the extraction efficiency is ensured; in addition, the extractant used in the method can be recycled, secondary pollution is avoided, and the method is economical and practical; in the method, main pollutants in waste water are all converted into important chemical raw materials, recycling is realized, sulfuric acid and Fenton reagents used are all converted into terminal products, difficulty of end waste water treatment is not increased, clean production is met, the treatment cost is low, the product has high added value, and the method has strong practicability.

The application discloses a method for repairing chlorinated groundwater pollution based on carbon dioxide nanobubbles, and the method is characterized in that nZVI, H2O2 and EDDS reagents are injected in a time sequence at different stages, and CO2 nanobubbles are used as a multifunctional medium throughout the process. The CO2 nanobubbles not only continuously remove the passivation layer through in-situ acidification, thereby fundamentally promoting the reduction effect of nZVI on chlorinated organic matter, but also couple a subsequent Fenton oxidation process, thereby greatly promoting the complete oxidation effect of toxic intermediates, effectively inhibiting the conversion of the final reaction product Fe 2+ Into secondary minerals, and controlling the risk of blockage from the source. Through the design of in-situ generation of catalyst Fe 2+ And the final removal of iron ions, the application maximizes the dosage of exogenous chemicals and the final residual, overcomes the environmental risks that may be introduced by traditional technologies or cause permanent physical damage, and realizes efficient, complete and sustainable repair of chlorinated organic pollutants in groundwater. 3+ ​

The invention relates to the technical field of industrial wastewater treatment, in particular to a treatment method for treating high-sulfonic-group wastewater by advanced oxidation, which comprises the following steps: regulating the pH value of the wastewater to 3.0-4.0, then carrying out photo-Fenton oxidation, controlling the molar ratio of H2O2 to Fe < 2 + > to be 300: 1-400: 1, regulating the pH value of the effluent to 5.0-6.0, adding sodium sulfite to quench residual H2O2 and flocculate and precipitate iron mud, and finally, carrying out secondary oxidation on the wastewater to obtain the high-sulfonic-group wastewater. Performing anaerobic-aerobic biochemical treatment on the supernate, adding sodium carbonate and sodium hydroxide into biochemical effluent to soften and descale, concentrating in a mechanical vapor recompression evaporator, washing and recrystallizing crystallized mother liquor, and adsorbing and purifying the crystallized mother liquor with activated carbon to obtain an industrial salt product. The problem of MVR evaporation scaling is effectively solved by accurately controlling the neutralization pH and combining the softening step, finally, wastewater standard treatment and salt high-quality recovery are achieved, the COD removal rate can reach 95% or above, and excellent environmental and economic benefits are achieved.

The utility model relates to the technical field of wastewater treatment, in particular to a wastewater treatment agent adding device based on a Fenton oxidation method, and adopts the technical scheme that the wastewater treatment agent adding device comprises a feed box, bearings II are embedded into two sides of the feed box, fixing rods are fixedly mounted on inner rings of the two groups of bearings II, fluted discs are mounted at one ends of the two fixing rods, and the fluted discs are connected with the feed box. A quantitative conveyor is installed at the bottom of the material box, a fixing plate is welded to the position, on one side of the quantitative conveyor, of the bottom of the material box, a first bearing is installed on the fixing plate in an embedded mode, a fixing roller is fixedly installed on an inner ring of the first bearing, and paddles are installed on the outer side of the fixing roller in an annular array mode. The spraying device has the advantages that sprayed materials can be dispersed through the paddles, and the spraying range of the materials can be adjusted according to actual conditions.

The invention relates to the field of wastewater treatment, in particular to a combined treatment method for azo dye and condensation dye production wastewater. The integrated process of enhanced Fenton oxidation, the IC anaerobic reactor, the anoxic tank, the aerobic tank (AO) and the membrane bioreactor (MBR) developed by the invention realizes efficient removal of organic matters, gives consideration to economical efficiency and stability, and breaks through the bottlenecks of high energy consumption and low efficiency of the traditional process.

The utility model provides an organic wastewater advanced treatment system based on Fenton oxidation reaction, and relates to the field of wastewater treatment. The organic wastewater advanced treatment system based on the Fenton oxidation reaction comprises a Fenton oxidation module, an advanced oxidation module, a neutralization and flocculation module and a precipitation module which are connected in sequence, the Fenton oxidation module is communicated with the deep oxidation module through a pipeline, the Fenton oxidation module is provided with a water inlet pipe, a first adding point and a second adding point, the first adding point is used for adding ferrous sulfate, the second adding point is used for adding hydrogen peroxide, the deep oxidation module is provided with a third adding point, and the third adding point is used for adding chlorine dioxide; the deep oxidation module, the neutralization and flocculation module and the precipitation module are co-constructed, and the common wall slots of every two adjacent modules are communicated. The system can effectively remove non-biodegradable substances in wastewater in industries such as printing and dyeing, pulping and papermaking and the like, and reduces the generation of chemical sludge at the same time.

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.

The invention relates to the technical field of silver powder wastewater treatment, in particular to a high-salt and high-COD silver powder wastewater treatment device and method. The technical problems that in the prior art, in the high-salt and high-COD silver powder wastewater treatment process, in the prior art, microelectrolysis reaction is prone to being inhibited by salinity, so that iron-carbon filler passivation is caused, the feeding amount of a Fenton oxidation agent depends on empirical estimation, dynamic regulation and control are lacked in the evaporative crystallization process, the overall treatment efficiency is low, and energy consumption exceeds the standard are solved. According to the technical scheme, according to the high-salt high-COD silver powder wastewater treatment device and method, wastewater parameters are obtained in real time through an online monitoring device, a dynamic wastewater treatment model is constructed based on an LSTM neural network, and an optimal treatment parameter combination is predicted; the micro-electrolysis current, the hydrogen peroxide adding proportion and the evaporation rate are dynamically optimized through the LSTM neural network, the wrapping effect of salt on filler is broken through combination of micro-electrolysis and ultrasonic oscillation, chemical adding is accurately controlled through an intelligent algorithm, the treatment efficiency is improved, and the operation cost is reduced.

This invention discloses a method for preparing Cu@C composite materials for in-situ Fenton oxidation systems and their applications, belonging to the field of inorganic non-metallic materials technology. The method involves placing copper acetate monohydrate in a high-temperature tube furnace, purging the furnace with inert gas, then raising the furnace temperature to 300–450°C at a rate of 4–10°C / min in an inert atmosphere, followed by raising it to above 550°C at a rate of 1–4°C / min, holding the temperature at this point for 0.5–2 hours, and finally cooling it to room temperature to obtain a Cu@C composite material with a "core-shell" structure. This invention utilizes the direct high-temperature pyrolysis of copper acetate monohydrate in an inert atmosphere to obtain a "core-shell" structured Cu@C composite material. Copper acetate plays a dual role as both a Cu and C source, avoiding the disadvantages of the H2 reduction method, such as easy explosion, high cost, and difficulty in large-scale production. This method is simple, safe and controllable, low-cost, green and pollution-free, and can be produced on a large scale. The prepared Cu@C composite material has a large specific surface area, high catalytic activity, and good cycle stability, and can be applied to in-situ H2O2 production and in-situ Fenton catalysis.

The utility model discloses a pharmaceutical wastewater treatment system which comprises a pretreatment module, an A < 2 > O treatment module, a Fenton oxidation module and a recovery module, the Fenton oxidation module and the pretreatment module are both communicated with the A < 2 > O treatment module, and the recovery module is communicated with the Fenton oxidation module; the A2O treatment module comprises a hydrolysis acidification tank, an anaerobic tank, a denitrification tank, an aerobic tank and a sedimentation tank; the Fenton oxidation module comprises a Fenton buffer tank, integrated Fenton equipment and a Fenton clean water tank; the combined treatment process of the pretreatment module, the A2O treatment module and the Fenton oxidation module is lower in cost compared with other processes which are mainstream adopted at present, organic matters in wastewater can be converted into methane, carbon dioxide, water, hydrogen sulfide, ammonia and the like under the action of microorganisms, and an aerobic treatment method is adopted, so that the wastewater treatment efficiency is improved. The BOD (biochemical oxygen demand) removal rate is higher than that of a traditional activated sludge method, the sludge yield is small, the treatment effect is better, residual organic matters in the wastewater can be removed through strong oxidation of the Fenton reaction, and the quality of discharged water is guaranteed.

The application discloses a groundwater cyanide pollution treatment system and relates to the technical field of groundwater pollution treatment. In the system, a sewage conditioning tank is used for water quality homogenization of underground sewage, and the underground sewage after water quality homogenization is input into a Fenton oxidation device; a multi-agent water inlet device is used for putting multiple agents into the Fenton oxidation device; the Fenton oxidation device is a cyanide pollution treatment site for underground sewage; a multifunctional water quality monitoring system is used for obtaining water quality parameters of water inlet of the Fenton oxidation device; an intelligent online control module is used for taking the water quality parameters of water inlet of the Fenton oxidation device as a feature vector, inputting into a machine learning prediction model, obtaining a predicted putting amount of the multiple agents, and controlling the multi-agent water inlet device based on the predicted putting amount of the multiple agents. The application realizes efficient and stable removal of cyanide by combining real-time monitoring with dynamic dosing and introducing a pollutant concentration-agent putting amount prediction mechanism, and guarantees that the effluent water quality continuously meets the standards.

The application relates to a Fenton-like composite material, in particular to a self-activated Fenton-like composite repair material and a preparation method and application thereof, the composite repair material is CaO2@Fe3O4@BIP-BC, a protein imprinting biochar is used as a matrix, magnetite serving as an activator and calcium peroxide serving as a slow-release oxidant are sequentially loaded on the surface. Compared with the prior art, the application has the advantages that (1) the biochar surface active groups and calcium peroxide improve the high efficiency and long-acting property of the Fenton-like process, (2) the protein imprinting improves the selectivity of the removal of target harmful bacteria and harmful bacteria genes, (3) the biochar simultaneously loads the calcium peroxide and the magnetite, the simultaneous addition of the activator and the oxidant is realized, and the use cost and the operation complexity are reduced. The method solves the problems that the traditional Fenton-like oxidation treatment has poor specific removal effect on harmful bacteria and harmful bacteria genes in the environment, the treatment time is short, the required dosage is high, secondary pollution is serious, and the activator and the oxidant need to be used separately.

This invention provides an integrated device for treating black and odorous shale gas backflow liquid, belonging to the field of wastewater treatment technology. The device includes a main body comprising: an air flotation slag removal chamber, a coagulation sedimentation chamber, an ozone oxidation chamber, a regulating chamber, a Fenton oxidation separation chamber, an anaerobic chamber, an aeration chamber, and a waste gas treatment chamber. The waste gas treatment chamber is located at the top of the main body, and the air flotation slag removal chamber, coagulation sedimentation chamber, ozone oxidation chamber, regulating chamber, Fenton oxidation separation chamber, anaerobic chamber, and aeration chamber are sequentially arranged below it. This integrated device offers excellent backflow liquid treatment performance; its integrated design facilitates management; and it effectively addresses the black and odorous problems of backflow liquid while solving the problems of complex processes and high costs associated with traditional black and odorous shale gas backflow liquid treatment methods, offering a simpler and more cost-effective approach.

The invention relates to the technical field of wastewater treatment, in particular to an acetylene production wastewater recovery process which comprises the following steps: S1, collecting waste sodium hypochlorite liquid generated in an acetylene cleaning process and cooling wastewater generated in an acetylene cooling tower according to an actual yield ratio, pumping into a regulating tank, and homogenizing water quality and water quantity; according to the method, more than 90% of dissolved acetylene in the wastewater is efficiently recovered through micro-negative pressure desorption, resource utilization is realized, secondary phosphorus and phosphorous which are difficult to degrade are thoroughly converted into positive phosphorus through Fenton oxidation, and the total phosphorus concentration is reduced to 0.5 mg / L or below in combination with neutralization and flocculation, so that the first-grade discharge standard is met, and the method is suitable for industrial production. The pH value of the purified water is finely adjusted to 10-11, then the purified water is used as a dilution carrier to be compounded with the sodium hypochlorite working solution, and the pH value after mixing is ensured to be always greater than 9.5, so that the pH dangerous interval is fundamentally avoided, the chloroacetylene explosion hidden danger is remarkably eliminated, the safety of the whole process is improved, the whole process forms a closed cycle, and the treated water is used for completely replacing fresh water to prepare the working solution.

The utility model discloses a heterogeneous fluidized bed Fenton oxidation tower, which relates to the related technical field of water treatment, and comprises a tower body and a base, a supporter is arranged in the tower body, two circulating pumps are arranged at the top of the base, a mixing component is arranged at the water outlet end of each circulating pump, and the mixing component comprises a first mixing cylinder and a second mixing cylinder. A ferrous sulfate pipe penetrates through the bottom of the first mixing cylinder, and a first communicating pipe is connected between the first mixing cylinder and the lower part in the tower body. Through the arrangement of the first mixing cylinder, the small cylinder and the communicating hole, sewage enters the first mixing cylinder through the first conveying pipe and the circulating pump, at the moment, ferrous sulfate is input into the small cylinder in the first mixing cylinder through the ferrous sulfate pipe, and the sewage in the first mixing cylinder penetrates through the communicating hole, enters the small cylinder and is in contact with the ferrous sulfate to be mixed; the residence time of the sewage is prolonged, so that the reaction time is prolonged, the sewage is prevented from quickly passing through a mixing structure, and the sewage can be uniformly mixed with ferrous sulfate.

The utility model belongs to industrial wastewater treatment technical field discloses a kind of Fenton oxidation pond packing shelf and Fenton reaction pond device, including packing shelf body and at least two hanging material layers, and packing shelf body includes upper shelf body and lower shelf body, and both are detachably connected along vertical direction, and upper shelf body top is provided with lifting connection structure;At least two hanging material layers are respectively arranged on upper shelf body and lower shelf body, and each layer hanging material layer includes multiple hanging material cross beams that are arranged in parallel along horizontal interval, and multiple filter bags are detachably and interval hung along the length direction of each hanging material cross beam, and filter bag interior is filled with zero-valent iron reagent, and raw water in oxidation pond can contact reaction with zero-valent iron reagent in its interior through the small hole of filter bag.The utility model effectively improves the contact efficiency of reaction reagent, reduces ferrous sulfate consumption, makes reaction process more sufficient, accelerates reaction rate, improves treatment effect;Meanwhile, it is convenient to quickly replace and supplement reaction reagent on packing shelf, and operation is simple.

The invention discloses a waste gas treatment system and process for POE alcohol production. The waste gas treatment system comprises a gas-water separation tank, a homogenization tank, a water washing tower, a Fenton oxidation reactor, an activated carbon adsorption tower, a water absorption tower, a catalytic oxidation reactor and an alkaline washing tower which are sequentially connected through pipelines. The method has the advantages that dust, acid gas, VOCs and trace toxic pollutants in the POE alcohol production waste gas are efficiently removed through a multi-stage cooperative treatment process, meanwhile, the operation cost is reduced, and secondary pollution is avoided.

The invention discloses a method for reducing COD (Chemical Oxygen Demand) of tetrahydrofuran production process wastewater, which comprises the following steps: S1, introducing the tetrahydrofuran production process wastewater into a molecular imprinting adsorption unit to selectively adsorb 1, 4-butanediol in the wastewater; s2, performing in-situ regeneration treatment on the molecularly imprinted polymer; meanwhile, the effluent is conveyed to a Fenton oxidation unit for oxidation treatment; s3, the outlet water is conveyed to an iron removal unit for iron removal operation; s4, introducing the effluent into a photocatalytic membrane separation unit, and carrying out photocatalytic oxidation degradation operation; and S5, sending the effluent to an activated carbon adsorption unit for adsorption treatment, and discharging the effluent after the effluent reaches the discharge standard. According to the wastewater treatment method disclosed by the invention, the 1, 4-butanediol can be efficiently and selectively removed, and the load of a subsequent working section is greatly reduced; and by virtue of the advantages of high-selectivity adsorption, strong oxidation, membrane self-cleaning and the like, the COD (Chemical Oxygen Demand) of the effluent is stably lower than the discharge standard, the whole process is stable in operation, and the long-term wastewater treatment requirement can be met.

Provided is a method for efficiently degrading leachate by chemical method, comprising the following steps: (1) oxidizing the leachate with oxidizing gas in a gas-liquid mixing reaction tank (4) to obtain oxidized reaction liquid B; (2) performing Fenton oxidation reaction on the oxidized reaction liquid B under acidic condition to obtain oxidized reaction liquid C; (3) adding alkaline substance to the oxidized reaction liquid C to make the solution react to produce precipitate and obtain solid-liquid mixture D; (4) performing solid-liquid separation on the solid-liquid mixture D to obtain filter residue E and filtrate E, wherein the filtrate E is the solution after process treatment. The method can greatly reduce the COD value and metal ion content in the leachate, thereby achieving the purpose of environmental protection. Also disclosed is an apparatus for treating leachate by using the above method.

The invention provides a method for synchronously extracting and quantifying micro-plastics and tire abrasives in sludge and application of the method, and belongs to the technical field of residual sludge pollution monitoring. The method comprises the following steps: firstly, freeze-drying and grinding the excess sludge, pre-oxidizing by using a hydrogen peroxide solution to destroy aggregates formed among MPs and TWP, clay, sand and other substances, and then heating to remove the hydrogen peroxide solution; and the residual hydrogen peroxide solution in the pre-oxidation process is prevented from being continuously decomposed in the subsequent density separation process to generate bubbles for jacking impurities to float upwards. A saturated sodium bromide solution and a saturated sodium iodide solution are adopted as flotation reagents for primary density separation and secondary density separation correspondingly, it is guaranteed that MPs and TWP with different densities are separated, impurities are removed through Fenton oxidation digestion, and interference on recognition of specific thermal cracking products of MPs and TWP is reduced. The method provided by the invention can quickly and accurately evaluate the mass concentration pollution status of MPs and TWP in the excess sludge.

The application relates to a Fenton-like oxidation treatment method, in particular to application of a self-activation Fenton-like composite repair material, the composite repair material being CaO2@Fe3O4@BIP-BC, and taking protein imprinting biochar as a matrix, and magnetite and calcium peroxide being sequentially loaded on the surface. Compared with the prior art, the application has the advantages that 1) the biochar surface active groups and calcium peroxide improve the high efficiency and long-acting property of the Fenton-like, 2) the protein imprinting improves the selectivity of the target harmful bacteria and harmful bacteria gene removal, 3) the activation agent and the oxidant are simultaneously added, and the use cost and operation complexity are reduced. The method effectively solves the problems of the traditional Fenton-like oxidation treatment, such as poor specific removal effect on harmful bacteria and harmful bacteria genes, short treatment time, high required dosage, serious secondary pollution and the need of separate use of the activation agent and the oxidant, and realizes high efficiency and long-acting repair of soil and water bodies polluted by harmful bacteria and harmful bacteria genes through the Fenton-like reaction.

The present invention provides a comprehensive hybrid system for the treatment of urban and industrial wastewater, integrating electrochemical processes, Fenton oxidation, and ozonation The system is designed to efficiently remove a wide range of pollutants, including suspended solids, organic compounds, and refractory substances that are resistant to conventional biological treatment. The hybrid process begins with electrochemical treatment, which generates coagulant ions and promotes the removal of both dissolved and suspended contaminants. This is followed by Fenton oxidation, where hydroxyl radicals produced from hydrogen peroxide and iron ions degrade persistent organic compounds. The final stage involves ozonation, which further oxidizes remaining pollutants, increases dissolved oxygen levels, and disinfects the effluent.