81 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 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 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 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 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 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.

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 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 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 present application relates to wastewater treatment technical field, specifically to a kind of heterogeneous fenton oxidation reaction device and wastewater treatment method;The device includes spatial three-dimensional metal framework, spatial three-dimensional metal framework inside is equipped with cavity, at least including one metal ring, metal ring is equipped with several holes passing through the metal ring, the component of metal ring includes single metal and / or metal oxide with catalytic effect;It also includes water distributor, the water outlet of water distributor is arranged in the cavity inside the spatial three-dimensional metal framework.The device can strengthen the micro-contact area of organic matter in wastewater and fenton reagent, and make mixed liquid and metal ring fully contact, increase the contact time of reactants, the rate of transmission and mixing reaction process can be increased by 1-3 times, the material mixing and reaction time is greatly shortened, energy consumption is reduced, reagent dosage is saved, the utilization efficiency of reagent is improved, catalyst catalytic efficiency, and the advantages of small floor space.

The application provides a method for activating argillaceous sandstone uranium ore by using field coupling Fenton oxidation, and belongs to the technical field of uranium ore resource development; the method comprises the following steps: firstly, H2O2 solution is added into argillaceous sandstone uranium ore slurry and mixed uniformly, then the slurry is transferred into a field generator, and U(IV) in the argillaceous sandstone uranium ore is oxidized into U(Ⅵ) by using the synergistic effect between ultrasonic, microwave or shear field and Fenton oxidation, and then high-concentration uranium leaching solution is obtained by filtration; the method for activating argillaceous sandstone uranium ore by using field coupling Fenton oxidation provided by the application promotes the peeling of clay minerals by field effect, improves the dispersibility of associated pyrite on the surface of clay, provides more active sites for Fenton activation reaction, and accelerates the Fenton oxidation reaction; thereby the uranium leaching efficiency is improved; the method significantly improves the current situation of uranium leaching difficulty in argillaceous sandstone uranium ore, the uranium content in the obtained leaching residue is lower, the required activation time is shorter, and the method is easy to be applied on a large scale.

The utility model relates to the technical field of Fenton oxidation towers, in particular to an improved Fenton oxidation tower which comprises a Fenton oxidation tower body, a water distribution component is mounted in the bottom end of the Fenton oxidation tower body, and a mixed flow guide component and a collecting tray are mounted in the top end of the Fenton oxidation tower body. The Fenton oxidation tower comprises a Fenton oxidation tower body, the Fenton oxidation tower body is provided with a collecting tray, the bottom end of the collecting tray is connected with a guide-out pipe extending to the outside of the Fenton oxidation tower body, and the top of the Fenton oxidation tower body is provided with a feeding assembly extending to the inside of the mixed flow guide assembly. Wherein the wastewater and the medicament solution flow along the mixing flow guide assembly and are mixed and then enter the collecting disc, so that the aim of synchronously feeding and mixing is fulfilled, and the overall time of the reaction process is saved.

The invention discloses a method for removing thallium in a natural iron-containing mineral and hydrogen peroxide system, and belongs to the technical field of sewage treatment. The surface of the obtained natural iron-containing mineral has abundant groups, and the natural iron-containing mineral can be used as a Fe (II) donor to form a Fenton oxidation system with H2O2 to quickly remove thallium pollutants in water. Meanwhile, in consideration of the problems of complex actual wastewater components, numerous interference factors and the like, the invention provides the removal performance of the natural iron-containing minerals on the thallium-containing wastewater under different conditions, and the treatment effect is relatively good. As a high-efficiency and low-cost wastewater treatment process, the method disclosed by the invention provides certain practical application significance for removing thallium.

The utility model relates to the technical field of sewage treatment, and particularly discloses a solid-state battery positive and negative electrode workshop wastewater treatment system, which comprises a positive electrode sewage pretreatment unit, a negative electrode sewage pretreatment unit, a positive electrode sewage treatment unit and a negative electrode sewage treatment unit, the hydrolysis acidification tank is connected with the Fenton oxidation tank and the second sedimentation tank through pipelines; the biochemical treatment unit sequentially comprises an anaerobic reaction tank, an A / O system and an MBR membrane tank which are connected through pipelines; and the anaerobic reaction tank is connected with the hydrolysis acidification tank through a pipeline. According to the system disclosed by the utility model, the Fenton oxidation pond is designed at the front end of biochemical treatment and is used for pre-treating positive and negative pole workshop wastewater with high COD content, removing part of COD and carrying out incomplete oxidation, and the hydrolysis acidification pond is designed at the front end of biochemical treatment, so that the B / C is improved, and the subsequent N removal and C reduction through biochemical treatment are facilitated.

The invention provides a method and a system for treating MVR distilled oil sludge wastewater, and belongs to the technical field of oil sludge wastewater treatment. Comprising the following steps: sequentially carrying out pressurized dissolved air flotation treatment, extraction treatment, acidification treatment until the pH value is 3.0-3.5, electro-Fenton oxidation treatment, deep oxidation treatment, pH value adjustment to 7.0-8.5 and addition of a flocculating agent for precipitation separation, electrocatalytic oxidation treatment, gravity settling separation and microbial degradation treatment on the MVR steamed oil sludge wastewater. According to the method, the MVR distilled oil sludge wastewater is pretreated, and after sequential treatment of the pretreatment steps, the BOD5 / CODcr ratio of the wastewater is increased to 0.3 or above, so that the microbial biodegradability of the wastewater is fundamentally improved, and the method can be suitable for subsequent microbial degradation treatment. According to the invention, the overall decontamination effect of the wastewater treatment process is improved, the overall treatment cost of the wastewater is reduced, and the effluent at the tail end of the microbiological degradation treatment process can stably meet the discharge requirements of the national GB / T31962-2015 Urban Wastewater Nano Tube Limit.

This invention discloses a pretreatment process for pharmaceutical intermediate wastewater before biochemical treatment, relating to the technical field of pretreatment of pharmaceutical intermediate wastewater before biochemical treatment. The treatment steps include: determining the required iron and carbon mass level for the wastewater's COD value; adjusting the wastewater's pH value; transporting the wastewater for micro-electrolysis and Fenton oxidation reactions; dynamically controlling the wastewater's pH value within a certain range during the reactions; adjusting the pH value of the effluent after the Fenton oxidation reaction; adding coagulants and flocculants for flocculation and sedimentation; and obtaining the effluent after filtration. This invention, by determining the iron and carbon mass level, can determine the dosage of relevant reagents in subsequent treatment steps and dynamically control the pH value of the iron-carbon micro-electrolysis and Fenton oxidation reactions within a range that yields good treatment results. This allows for a simpler and more efficient reduction of the organic matter concentration in pharmaceutical intermediate wastewater and, to a certain extent, improves its biodegradability.

The invention provides a Fenton oxidation method and system, and belongs to the technical field of water treatment. The Fenton oxidation method comprises the following steps: adjusting the pH value of raw water to 3.5-4.0 to obtain acid-adjusted water; mixing the acid-regulated water, hydrogen peroxide and ferrous sulfate, and carrying out Fenton oxidation reaction to obtain reaction effluent; part of the reaction effluent is in contact with an iron material to generate reclaimed water, and the reclaimed water flows back to a reaction system of the Fenton oxidation reaction; and carrying out flocculent precipitation on the residual reaction effluent to obtain sludge and treated effluent. The invention aims to improve the utilization rate of the catalyst, reduce the waste of the catalyst, reduce the dosage of the catalyst, reduce the sludge output and reduce the sludge treatment cost.

The invention relates to sewage treatment, in particular to a method and a system for removing organic matters in salt-containing leachate. According to the method, the salt-containing leachate is subjected to Fenton oxidation under the acidic condition that the pH value is 2.0-5.0, then complexing sedimentation and solid-liquid separation are carried out under the acidic condition that the pH value is 3.0-5.0, and relatively large organic intermediate product molecules (such as phenols and aromatic carboxylic acids) are removed; adjusting the supernate to be neutral or alkaline, removing complexing of soluble organic acid iron complexes (such as carboxylic acid iron complexes and the like), and releasing small-molecule organic intermediate products (such as aliphatic carboxylic acid and the like); and adjusting the pH value of the water body to be 4.0-6.0 and weakly acidic, adding a flocculating agent, and removing residual micromolecular organic intermediate products.

The invention discloses a method for promoting aqueous-phase hydroxyl free radicals to migrate to soil to directly oxidize petroleum hydrocarbons, which comprises the following steps: mixing a chitin mixture, a citric acid-ferrous sulfate solution and H2O2 water to react to prepare a Fe-SOM material; mixing the Fe-SOM material with petroleum-contaminated soil, performing rotary oscillation, regulating and controlling the relative polarity of the soil, and guiding hydroxyl radicals to directionally migrate from a water phase to a solid phase to obtain a Fe-SOM regulated and controlled soil material; h2O2 is added into the Fe-SOM regulated soil material for continuous oscillation, and the process of directly oxidizing the petroleum hydrocarbon in the soil is completed. Introduction of organic functional groups is changed by regulating materials, the organic matter content of soil is increased, and therefore the relative polarity of the soil is improved; by improving the relative polarity of the soil, the transfer ratio of hydroxyl radicals is increased, the relative polarity eta value of the soil and the direct oxidation amount of TPH are increased, petroleum is directly oxidized in a solid phase, and therefore the effect of Fenton petroleum oxidation is improved.

The invention discloses a treatment method and a treatment system for nickel-cobalt hydrometallurgy wastewater, and belongs to the technical field of hydrometallurgy wastewater treatment. Comprising the following steps: carrying out oil removal pretreatment on wastewater; carrying out acidic phosphorus removal treatment on the effluent subjected to the oil removal pretreatment; carrying out neutralization precipitation reaction on the effluent subjected to acidic phosphorus removal treatment; filtering the effluent after the neutralization precipitation reaction, carrying out heavy metal detection on the filtered effluent, refluxing unqualified wastewater to acidic dephosphorization treatment or neutralization precipitation reaction for retreatment, carrying out Fenton oxidation reaction on qualified wastewater, adding a calcium salt neutralizer after the reaction is finished, and carrying out solid-liquid separation to obtain underflow and supernate; and pressurizing the supernate, filtering the supernate in an activated carbon security filter, adjusting the pH value of the filtered effluent, and discharging or recycling the effluent after reaching the standard. According to the method, efficient treatment of the nickel-cobalt hydrometallurgy wastewater is achieved, it is guaranteed that first-class pollutants of effluent reach the standard, and the problem that subsequent effluent and waste residues are difficult to treat is avoided.

This invention relates to the field of water treatment technology, specifically to a nanofiltration membrane integrated process for treating leachate from landfill transfer stations and a flocculant for its pretreatment stage. This flocculant utilizes ionic liquid-grafted diatomaceous earth and sulfonate-modified branched polyamide crosslinking in synergy, combined with in-situ aluminum and iron salts to generate a highly efficient composite flocculant. This achieves rapid removal of multiple pollutants and enhanced floc stability, significantly reducing the risk of subsequent membrane fouling. The process employs an "innovative pretreatment-stage nanofiltration-deep purification" model. The membrane types for each nanofiltration stage are optimized and screened according to pollutant characteristics, achieving molecular-level stepwise filtration. The final stage combines photo-Fenton oxidation, dense nanofiltration, or reverse osmosis in a flexible combination, balancing efficient COD and salinity reduction with energy consumption control. This process produces stable effluent quality, low membrane fouling, significantly reduced reagent and operating costs, and is adaptable to different discharge standards, demonstrating significant engineering application value.

The invention discloses a liquid nitrile rubber wastewater treatment method, which comprises: S1, carrying out supergravity air stripping on nitrile rubber wastewater under nitrogen protection under the conditions of a supergravity factor of 50-100 and a gas-liquid ratio of 500-2500; s2, sequentially carrying out ozone oxidation and Fenton oxidation on the wastewater treated in the step S1; and S3, carrying out solid-liquid separation on the wastewater treated in the step S2 to obtain a liquid component, distilling the liquid component, and adjusting the pH value until the wastewater reaches the discharge standard. After the high-concentration liquid nitrile rubber wastewater with the COD of 5000-20000 mg / L is treated, the COD is reduced to 50 mg / L or below, impact on a subsequent sewage treatment plant is avoided, and up-to-standard discharge of the wastewater is realized.

The invention belongs to the technical field of wastewater treatment, and discloses a continuous cross-flow double-groove electro-Fenton reactor which comprises a Fenton oxidation reaction tank, the bottom of the Fenton oxidation reaction tank is fixedly communicated with an electrochemical reaction tank through a circulating pump, and the upper sides of the Fenton oxidation reaction tank and the electrochemical reaction tank are communicated through a pipeline; through cooperation of structures such as an arc-shaped plate, turbulent flow holes, a first axial flow paddle, a second axial flow paddle and a radial flow paddle, under the combined action of combined paddles in different stirring directions, circulating stirring of liquid in the tank is promoted, the arc-shaped plate rotating along with the double-layer rotating disc continuously stirs the liquid, and the liquid enters a concave surface of the arc-shaped plate, then penetrates through the turbulent flow holes and is discharged; liquid can become disordered after passing through the small holes, so that full mixing of chemicals and wastewater in the area is promoted, the circulation stirring effect is matched, the turbulence of liquid flowing is improved, and when the arc-shaped plate is close to the deflection baffle, the strip nails are inserted into the turbulence holes for dredging, and hole channel blockage is effectively prevented.

The present application relates to a kind of industrial park multi-water kind wastewater integrated treatment system, it includes coarse grid pool, rotary grit system, adjusting pool, materialization reaction pool, hydrolysis tank, biochemical pool, two sedimentation tank systems, depth processing system, ozone contact tank and disinfection contact tank in series, wherein materialization reaction pool includes dosing stirring reaction zone, materialization pool flocculation zone and materialization pool sedimentation separation zone, and dosing stirring reaction zone can realize Fenton oxidation reaction to improve wastewater biodegradability, then wastewater is treated by biochemical pool, and each index is well treated, wherein the pre-anoxic zone in biochemical pool can reduce the influence of reflux sludge on anaerobic zone, internal reflux channel can recycle reflux sludge, then wastewater is precipitated and deeply treated by two sedimentation tank systems and depth processing system.The present application can guarantee that industrial park wastewater is stably discharged up to standard, and equipment can be realized according to wastewater situation Surpassing, while meeting the wastewater treatment requirements of large water volume and high dirt.