99 results about "Oxidative treatment" patented technology

The invention discloses a sectional catalytic wet oxidation sewage treatment device and a treatment method, and aims to solve the technical problem that in the prior art, when sewage is oxidized, introduced oxygen can only be in contact with the surface of the sewage, so that the sewage cannot be quickly oxidized, and the treatment efficiency is relatively low. The device comprises a heating unit and a segmented catalytic reaction unit, wherein the heating unit comprises a heat exchange device and a heating device; the segmented catalytic reaction unit comprises a first catalytic reactor, a first empty tower reactor, a second catalytic reactor and a second empty tower reactor; each of the first catalytic reactor and the second catalytic reactor comprises a base, a filter box is fixedly mounted at the front end of the top of the base, a pump machine is fixedly mounted behind the filter box, and a treatment tank is fixedly mounted at the rear end of the top of the base. The sewage oxidation treatment efficiency is greatly improved.

The invention discloses a sewage treatment process for organic wastewater, and belongs to the field of sewage treatment.The sewage treatment process comprises the following steps that S1, wastewater containing nitrogen-containing organic phosphonic acid metal complexes is pumped into a dielectric barrier discharge reactor, and P-C bond energy is reduced through high-energy electron bombardment; s2, adding a modified layered metal hydroxide containing interlayer co-intercalation carbon quantum dots and persulfate and a composite oxidant of aspergillus niger immobilized microspheres into the wastewater subjected to plasma treatment; s3, deeply adsorbing heavy metal ions in the wastewater subjected to composite oxidation treatment in a gradient magnetic field by utilizing a magnetic layered metal hydroxide material; s4, the wastewater subjected to magnetic adsorption sequentially passes through an anaerobic ammonia oxidation coupling reactor and an aerobic biological membrane-activated sludge system to degrade pollutants; s5, dephosphorizing the wastewater subjected to biological treatment by algae by adopting a layered immobilized phycomycete symbiotic system; and S6, tail end magnetic recovery and effluent disinfection. The invention aims to solve the problems of low decomplexing efficiency and halfway decomplexing in the prior art.

According to the dry fish maw capable of inhibiting fat oxidation and the preparation method thereof, fresh air bladders are soaked in a lactic acid bacteria solution, then subjected to anti-oxidation treatment with a chlorogenic acid solution, soaked in alkali liquor and dried, and the dry fish maw capable of inhibiting fat oxidation is obtained. Lactobacillus treatment and chlorogenic acid anti-oxidation treatment are combined, alkali is used for neutralizing generated acidic substances, natural substances are used for treatment, harmful compounds are not introduced, and the eating risk is reduced. Moreover, the yellowness value can be effectively reduced, the increase of POV value and TBA value is inhibited, the rancidity and rancidity of the dried fish maw are reduced, and long-time storage is facilitated. The preparation process is green and safe, short in treatment time and suitable for industrial production of dried fish maw.

The invention discloses a method for oxidation treatment of winery wastewater, and belongs to the technical field of environmental protection. The winery wastewater treatment method comprises the following steps: mixing winery wastewater and persulfate to form a reaction solution, and then carrying out ultrasonic cavitation treatment on the reaction solution to generate hydroxyl free radicals and persulfate free radicals. The treatment method disclosed by the invention has the advantages of simple process, high safety and low cost, and shows a good application prospect in the environmental protection fields such as winery wastewater treatment and similar wastewater treatment.

The invention discloses a multi-stage oxidation treatment system for high-salinity wastewater and an optimized operation method, and relates to the technical field of high-salinity wastewater, the method comprises the following steps: collecting oxidation parameters of each stage of reaction tank through an integrated sensor and a processor; setting a target degradation efficiency, a maximum oxidant adding threshold value and a byproduct concentration threshold value based on the initial water quality; adjusting the adding amount of each stage of oxidizing agent through a sliding mode-PID composite controller; setting a dynamic oxidant parameter regulation strategy, and dynamically adjusting the oxidant mixing speed and reaction time according to the real-time temperature and pH value; if the by-product concentration of any stage is greater than 1.2 times of the by-product concentration threshold value, or the accumulated medicament cost exceeds the set medicament cost threshold value, updating the target degradation efficiency, the maximum oxidant adding threshold value and the by-product concentration threshold value, and triggering an alarm. The problems that in the multi-stage oxidation process, the adding amount of each stage of oxidizing agent is difficult to accurately control, the optimal degradation effect is achieved, and meanwhile the agent cost is reduced are solved.

The invention provides a pre-oxidation and coagulation integrated water treatment experiment device, and relates to the technical field of sewage treatment, the pre-oxidation and coagulation integrated water treatment experiment device comprises a support frame, a mixing unit is mounted at the top end of the support frame, and an extraction unit and a water taking unit are mounted on the mixing unit; the extraction unit is used for sampling the sewage oxidized by the plurality of groups of mixing units at the same time; the water taking unit is used for simultaneously extracting a plurality of groups of supernatant liquid after sewage precipitation and adjusting the extraction height according to the depth of the supernatant liquid; the mixing unit comprises a mixing part, a driving part and a precipitation part, and the mixing part is used for physically separating multiple groups of sewage samples and synchronously mixing each group of sewage samples with a treatment agent; according to the sewage treatment device, the motor drives the driving gear to synchronously drive all the driven gears to rotate and drive the vertical shaft and the stirring blades to rotate, so that sewage, an oxidant and a coagulant in the multiple groups of mixing boxes are synchronously stirred respectively, and errors caused by manually controlling multiple groups of stirring devices are avoided.

The invention relates to the field of breeding wastewater treatment, and discloses N-P-O-metal biochar and a biogas slurry resourceful treatment system and method.The preparation method of the N-P-O-metal biochar comprises the steps that straw, a phosphoric acid solution, wood vinegar and biogas slurry are mixed and subjected to a hydrothermal reaction, and hydrothermal carbon is obtained; dipping the hydrothermal carbon in an activating agent solution, and then sequentially activating, washing and drying to obtain one-step activated carbon; soaking and activating the one-step activated carbon in a heteroatom doping agent, and performing oxidation treatment under oxygen-containing gas to obtain N-P-O activated carbon; the preparation method comprises the following steps: mixing a ferric salt solution and a magnesium salt solution to obtain a mixed solution, putting N-P-O activated carbon into the mixed solution, stirring and dipping, and then performing pyrolysis to obtain the N-P-O-metal biochar. The N-P-O-metal biochar disclosed by the invention can be used for treating a clear biogas slurry obtained by filtration through a capacitive deionization device, and efficient enrichment of nutritional ingredients is realized while pollutants are effectively degraded.

The application provides an oil and gas field waste liquid classification gradient treatment method. The method comprises the following steps: performing electro-oxidation treatment on produced water to obtain electro-oxidation treated produced water; performing adsorption treatment on part of the electro-oxidation treated produced water by using an adsorption material to capture active chlorine, so as to obtain the adsorption material for capturing active chlorine and the adsorption treated produced water; performing biological treatment on the adsorption treated produced water to obtain treated produced water; mixing the other part of the electro-oxidation treated produced water with operation waste liquid, adding the adsorption material for capturing active chlorine, and obtaining gel breaking and de-stabilizing treated operation waste liquid; and performing coagulation and flocculation separation and ion control on the gel breaking and de-stabilizing treated operation waste liquid to obtain treated operation waste liquid. The method is suitable for large platform production mode of oil and gas field development, and can perform classification gradient treatment on produced water and operation waste liquid produced and discharged from platforms in the same region or adjacent regions, so that the treatment cost is reduced.

The invention discloses a UASB (Upflow Anaerobic Sludge Blanket) wastewater treatment method. The method comprises the following steps: wastewater pretreatment; treating with a multi-stage UASB reactor; performing electrochemical oxidation treatment; product collection and biogas recovery; and post-treating the wastewater. Through the multi-stage UASB reactor system, the wastewater treatment efficiency and the biogas yield can be remarkably improved, and each stage of reactor runs under different operation conditions to adapt to the characteristic change of the wastewater, so that the problem of load fluctuation when a single-stage reactor is used for treating the high-concentration organic wastewater can be effectively solved; the stability and the impact resistance of the system are enhanced; before wastewater enters the first-stage UASB reactor, a heat exchanger is used for preheating the wastewater so as to improve the activity and degradation efficiency of anaerobic microorganisms and ensure the reaction effect, meanwhile, a plurality of reaction sections are arranged in the first-stage UASB reactor, each section has different sludge concentration and flow velocity, gradient flow is formed, degradation of different organic matters is promoted, and the wastewater treatment effect is improved. The wastewater treatment effect is further ensured.

The present invention belongs to the technical field of wastewater treatment, and relates to a device and method for electro-oxidation treatment of sodium phenolate sewage, comprising a treatment frame body, partition plates, cover caps, a feeding frame, a filter screen and a liquid inlet pipe. Three partition plates are connected to the treatment frame body at intervals, and the partition plates divide the cavity inside the treatment frame body into four chambers. Three cover caps are connected to the top of the treatment frame body, and the three cover caps respectively block the three chambers on the right side of the treatment frame body. A feeding frame is connected inside the leftmost chamber, and a filter screen is arranged at the bottom of the feeding frame. One side of the treatment frame body is communicated with a liquid inlet pipe, and a drain port is opened on the other side of the treatment frame body, and a valve is arranged at the drain port. When treating sodium phenolate sewage, the present invention can add the medicament through the injection groove on the feeding block. Each time the added medicament just fills one injection groove, ensuring the consistency of the added amount of the medicament, without manual weighing, being more convenient to operate and having higher treatment efficiency.

This invention relates to an advanced oxidation-biological co-treatment system and method for mineral processing wastewater. The advanced oxidation-biological co-treatment method for mineral processing wastewater of this invention includes the following steps: S1: Introducing polymetallic mineral processing wastewater into a pretreatment tank and adjusting the pH value for initial sedimentation treatment; S2: Introducing the supernatant into a coagulation sedimentation tank and adding a coagulant for secondary sedimentation treatment; S3: Introducing the supernatant into an ozone catalytic oxidation tower, adding a catalyst, and performing oxidation treatment to remove toxic and recalcitrant substances, and then removing residual ozone; S4: Introducing the wastewater into a biochemical reactor for biological treatment, followed by sludge settling, and discharging the supernatant after it meets the standards. The advanced oxidation-biological co-treatment method for mineral processing wastewater of this invention selectively catalytically oxidizes the wastewater before biological treatment, thereby improving the biodegradability of the wastewater.

The utility model provides a wastewater oxidation treatment device relates to sewage treatment technical field, including reaction cylinder, mixing pipe, dosing mechanism and drainage mechanism, dosing mechanism and the output of drainage mechanism are linked with mixing pipe, reaction cylinder includes cylinder, first cover and second cover, first cover and second cover are covered respectively in both ends of cylinder, be equipped with the cavity in first cover, be equipped with a plurality of through -hole with the cavity intercommunication on first cover, a plurality of through -hole are linked with cylinder, be equipped with a plurality of filler layer in cylinder along the axial direction, be equipped with the water inlet with mixing pipe intercommunication on first cover, be equipped with the water outlet and exhaust port on second cover. The utility model discloses through mixing pipe can make liquid medicine fully mix in wastewater, make the pollutant in wastewater fully oxidize in reaction cylinder, effectively remove the pollutant in wastewater, and filter before and after wastewater oxidation, improve the treatment effect of wastewater.

The invention relates to a strong oxidation treatment process of wastewater, which comprises the following steps: S1, collecting secondary biochemical treatment effluent in a reaction tank, and adjusting the pH value of the water body in the reaction tank to 3.5-4.0; s2, adding a Fenton reaction catalyst and a slow-release hydrogen peroxide preparation at the front section of the reaction tank; adding a hydrogen peroxide solution into the middle section of the reaction tank, uniformly mixing and reacting; and S3, guiding the water body after the reaction in the reaction tank out of the reaction tank, adjusting the pH value of the guided water body to 7.0-8.0, and carrying out coagulation, flocculation and precipitation to obtain clarified effluent. The method has the beneficial effects that the reaction efficiency of hydrogen peroxide can be improved, the medication cost is reduced, the sludge yield is reduced, the color reversion of treated water is avoided, and the wastewater treatment effect is integrally improved. The process is suitable for advanced treatment of high-concentration organic wastewater in the industries of pharmacy, printing and dyeing, electroplating, chemical engineering and the like.

The utility model discloses a perchlorate wastewater purification treatment device, which comprises a reduction tank for carrying out biochemical reduction treatment on bacteria, an oxidation tank for carrying out biochemical oxidation treatment on bacteria, a sedimentation tank and a clean water tank, and the reduction tank, the oxidation tank, the sedimentation tank and the clean water tank are sequentially communicated. The device comprises a reduction tank for carrying out biochemical reduction treatment on bacteria, an oxidation tank for carrying out biochemical oxidation treatment on the bacteria, a sedimentation tank and a clean water tank which are communicated in sequence, low-cost and high-efficiency treatment of perchlorate can be realized through a combination mode of'bacterial biochemical reduction-bacterial biochemical oxidation-precipitation ', and the process is simple.

This utility model relates to an ammonia nitrogen wastewater treatment device, comprising a heating stripping unit, a chemical precipitation unit, and a breakpoint chlorination unit. The heating stripping unit includes a stripping section and a stripping heating section, which strips the ammonia nitrogen wastewater. The stripping heating section is fixed to the stripping section. The chemical precipitation unit includes a precipitation reactor, whose inlet is connected to the wastewater outlet of the stripping section. The precipitation reactor has a precipitant feeding port and performs chemical precipitation treatment on the wastewater from the stripping section. The breakpoint chlorination unit includes an oxidation reactor, whose inlet is connected to the wastewater outlet of the precipitation reactor via a pipeline. The oxidation reactor has an oxidant feeding port and oxidizes the wastewater from the precipitation reactor. This utility model treats ammonia nitrogen wastewater using the heating stripping unit, chemical precipitation unit, and breakpoint chlorination unit, achieving efficient and thorough treatment of high-concentration ammonia nitrogen wastewater.

The utility model discloses a novel industrial sewage PDS strong oxidation treatment device, and relates to the technical field of sewage treatment equipment, in particular to a novel industrial sewage PDS strong oxidation treatment device which comprises a filter box, an oxidation box and a settling box which are communicated with one another in sequence, the sewage in the oxidation tank is stirred through the stirring part; a persulfate solution is contained in a persulfate solution box, and the persulfate solution is conveyed into an oxidation box through a flow dividing pipe, so that the persulfate solution is in contact with sewage; the stirring part drives the flow dividing pipe to lift and move in the oxidation box while stirring the sewage, namely, the flow dividing pipe lifts and moves in the sewage, so that a persulfate solution is more comprehensively contacted and mixed with the sewage, and the mixing effect of the persulfate solution and the sewage is greatly improved; the persulfate solution is subjected to an oxidation-reduction reaction, a catalytic oxidation reaction and the like in the sewage, so that the aim of purifying the sewage is fulfilled.

The invention belongs to the technical field of wastewater treatment materials, and relates to an adsorbent, in particular to an adsorbent for high-concentration COD biochemical tail water treatment and a preparation method and application thereof.The preparation method comprises the following steps that S1, activated carbon is subjected to nitrogen doping treatment, and nitrogen-doped activated carbon is obtained; s2, carrying out oxidation treatment on the nitrogen-doped activated carbon to obtain oxidized-nitrogen-doped activated carbon; s3, treating the oxidized-nitrogen-doped activated carbon under oxygen-enriched and low-pressure conditions to obtain the adsorbent. The adsorbent provided by the invention not only improves the adsorption effect, but also has high oxygen carrying performance, is used for treating high-concentration COD biochemical tail water, not only can efficiently adsorb suspended particulate matters so as to avoid adverse effects on a subsequent membrane treatment device, but also can release oxygen into the tail water so as to improve the oxygen content in the tail water, so that the treatment effect of the high-concentration COD biochemical tail water is improved. The activity of microorganisms in the aerobic biochemical treatment process is enhanced, so that the treatment effect is improved.

The application discloses a pretreatment method of gas field water, which comprises the following steps: gas stripping of the gas field water to obtain gas phase and liquid phase, wherein the volume ratio of the gas field water to the stripping gas is 1:8-20; returning the gas phase to the previous step after dry desulfurization; adding the liquid phase into a dissolved air water floatation after oxidative desulfurization and oil-water separation by biomass modified cotton sponge; performing oxidation treatment on the water phase after oil-water separation, then performing sedimentation treatment, and performing filtration treatment on the water phase after solid-liquid separation; removing sulfur and reducing COD by gas stripping and oxidation; treating the hydrogen sulfide gas generated by the gas stripping by dry desulfurization; recycling the desulfurized gas; removing suspended solids, high-valence metal ions with valence of two or more, colloids, organic matters, bacteria and microorganisms by a ceramic ultrafiltration membrane filter and a ceramic nanofiltration membrane filter.

The invention discloses a < 131 > I labeled SNO hydrogel material and a preparation method of the < 131 > I labeled SNO hydrogel material. The hydrogel material is mainly composed of hyaluronic acid, firstly, one kind of hyaluronic acid is modified, API molecules are modified on the side chain of the hyaluronic acid, a reaction site is provided for marking of < 131 > I nuclide, meanwhile, the hyaluronic acid is subjected to oxidation treatment, the hyaluronic acid rich in aldehyde groups becomes a monomer for forming the hydrogel, the hyaluronic acid with another molecular weight is selected, and the molecular weight of the hyaluronic acid is changed into the molecular weight of the hydrogel. ADH rich in hydrazide groups is introduced into a side chain through amidation reaction, a hydrazone bond is formed through reaction of aldehyde groups and hydrazide, and the chemical bond can endow the hydrogel with injectable and self-healing characteristics. Nuclide labeling of the hydrogel is completed for the first time through a chloramine T method, the overall labeling rate reaches about 80%, the hydrogel has good stability under physiological conditions, < 131 > I is not prone to falling off from the hydrogel, and the hydrogel has a good antibacterial effect at 500 mu ci. By constructing a bacterial infection osteoarthritis model, it is verified that the < 131 > I-labeled HA hydrogel has good injectability, the in-situ enrichment capacity of iodine < 131 > I is improved, and therefore the antibacterial efficiency is improved, the method is simple in preparation, the < 131 > I labeling efficiency is high, the method can be widely applied to osteoarthritis caused by bacterial infection, and the application prospect is wide. And a wide prospect is provided for clinical treatment of the disease.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a recycling method of coal chemical industry conversion high-ammonia-nitrogen wastewater, which comprises the following steps: S1, diluting the coal chemical industry conversion high-ammonia-nitrogen wastewater by at least one time to obtain diluted wastewater, and carrying out oxidation treatment to obtain first treatment liquid; s2, performing cold treatment on the first treatment liquid to obtain ammonium carbonate and a second treatment liquid; s3, performing carbonization treatment on the second treatment solution to obtain ammonium bicarbonate and a third treatment solution; and S4, carrying out ammonium sulfate treatment on the third treatment liquid to prepare ammonium sulfate. According to the recycling method of the high-ammonia-nitrogen wastewater provided by the embodiment of the invention, effective components in the wastewater are recycled step by step through a simple hierarchical recycling process, so that the treatment problem of the high-ammonia-nitrogen wastewater is effectively solved, the treatment cost of the wastewater is reduced, and the resource utilization of the wastewater is also realized.

The application discloses a method for degrading brominated organic pollutants in water by using UV / H2O2, and first establishes a high-level oxidation treatment method for brominated pollutants in water by combining UV and H2O2, determines the initial concentration of the brominated pollutants and the adding proportion of the oxidant H2O2 by using absorbance, Lambert-Beer law and the principle of absorbance additivity, and verifies the rationality of the concentration settings of the brominated pollutants and the oxidant in the kinetics evaluation, and further establishes a detection method for bromide ions, which, compared with the traditional ion chromatography method, does not need an additional pretreatment process, avoids the matrix interference of coexisting organic matters, and greatly saves the experimental and instrument use costs; for the identification of degradation products, the method established by the application accurately detects the evolution trend of more than twenty structural molecules in the examples along with the treatment process, and the method can be widely applied to the wastewater treatment of brominated flame retardants, brominated phenols and other bromine-containing organic matters in the environment.

The invention discloses a treatment device and method for treating ammonia nitrogen in domestic sewage through catalytic electrooxidation, and relates to the technical field of sewage treatment.The treatment device comprises a treatment tank and further comprises a conical pipeline which is installed in the treatment tank and can sequentially convey impurities from bottom to top and extrude the impurities to separate out chemical agents; the driving mechanism is mounted at the top of the conical pipeline and can throw out the separated chemical agent layer by layer along the conical pipeline and form a three-dimensional diffusion path, two groups of conductive assemblies which are parallel up and down are mounted outside the conical pipeline, and an electric field can be formed after the two groups of conductive assemblies are electrified; impurities can be dynamically captured and gathered to the bottom of the conical pipeline, the impurities are conveyed from bottom to top through the conical spiral shaft, the entrained medicament is separated out and is distributed and controlled again layer by layer through the spiral groove, full utilization of the medicament is achieved, the dual-operation mode of electric field wide-area scanning and local strengthening of the conductive assembly is combined, and the functions of impurity capturing and conveying are achieved; the sewage treatment efficiency is improved.

This invention belongs to the field of wastewater treatment technology, specifically relating to a method and apparatus for reusing chlorinated benzene rubber wastewater. The method includes the following steps: homogenization: introducing the chlorinated benzene rubber wastewater into a homogenization tank and introducing air to discharge chlorine-containing waste gas; oxidative flotation: subjecting the treated wastewater, oxidized wastewater, and chlorinated benzene-containing waste gas to oxidation treatment, then re-entering the oxidation tank for further treatment under ultrasonic synergistic action, and repeating this cycle to remove organic matter and suspended solids; clarification and buffering: the oxidized wastewater enters a buffer tank; pretreatment for reuse: the water after multi-media treatment enters an ultrafiltration unit to further remove particulate matter from the multi-media effluent; reuse treatment: the remaining wastewater enters a reverse osmosis unit for reuse, and the concentrated wastewater is sent to a wastewater treatment plant. This invention provides a method for reusing chlorinated benzene rubber wastewater that is environmentally friendly, produces high-quality wastewater, and has a high production rate; this invention also provides a reuse apparatus.

The invention belongs to the technical field of sewage treatment, and particularly relates to a medical sewage treatment method for synergistically removing new pollutants and pathogenic microorganisms, which comprises the following steps: S1, pretreatment: putting an inorganic flocculant into medical sewage to promote the aggregation and precipitation of suspended particles and colloids in the medical sewage; s2, oxidation treatment: a composite agent is put into the pretreated medical sewage, a direct-current electric field is applied at the same time, the composite agent comprises potassium monopersulfate composite salt, sulfamic acid, sodium chloride, sodium bromide, a surfactant, a pH buffer agent, a composite corrosion inhibitor, an anti-blocking agent and anhydrous sodium sulfate, strong-oxidizing components are generated after the composite agent is dissolved, and the strong-oxidizing components are added into the pretreated medical sewage; organic matters are mineralized and decomposed, and pathogens are killed; s3, biochemical treatment: carrying out biochemical treatment on the medical sewage subjected to oxidation treatment to remove ammonia nitrogen and small molecular organic matters. According to the invention, various new pollutants can be effectively decomposed, pathogenic microorganisms are inactivated, and the treatment effect is improved.

Provided herein is a process for the removal of micropollutants and / or other pollutants from water, involving subjecting the water to a consecutive combination of biological adsorbent filtration (BAF) followed by oxidation treatment (OT), preferably ozone treatment. In a preferred embodiment, an adjustable amount of the OT effluent, preferably an adjustable amount ranging between 10-100%, more preferably 20-90%, more preferably 20-80%, most preferably 20-50% of the OT effluent, is recirculated to the BAF. The process may involve monitoring the formation of oxidation products at the end of the OT, and / or for measuring TOC, DOC, SUVA, ammonium and / or specifically targeted pollutants in or at the end of the BAF, and controlling the amount of BAF-OT treated water which is recirculated to the consecutive steps of BAF and OT based on the output of the monitoring step.

The present invention relates to a system for treating wastewater produced by water-based paint, comprising a pretreatment unit, an oxidation treatment unit, a biochemical treatment unit and a deep treatment unit connected in sequence. The pretreatment unit comprises a regulating tank and a demulsification tank, which are used to regulate the water quality of the wastewater and demulsify the wastewater, so as to facilitate the discharge of the oil phase after demulsification and reduce the load of subsequent oxidation treatment; the oxidation treatment unit is used to treat refractory organic matter in the wastewater by chemical catalytic oxidation; the biochemical treatment unit comprises a micro-oxygen hydrolysis tank, an anoxic tank and an aerobic tank connected in sequence, the micro-oxygen hydrolysis tank is used to hydrolyze macromolecular organic matter and improve the biodegradability of the wastewater; the deep treatment unit comprises an oxidation adsorption sedimentation tank, which is used to treat residual organic matter in the wastewater by deep oxidation.

The utility model provides a dye intermediate production wastewater treatment device and relates to the technical field of water treatment. The dye intermediate production wastewater treatment device comprises an adjusting tank, a filtering device, a first-stage reverse osmosis device, a second-stage reverse osmosis device, a third-stage reverse osmosis device, a first oxidation treatment device, a biological aerated filter, a second oxidation treatment device and an MVR evaporative crystallization device. Wherein the regulating tank keeps the water quality of wastewater stable; the filtering device is used for removing suspended matters in the wastewater; the reverse osmosis device is used for carrying out membrane separation treatment on the dye intermediate wastewater to remove most organic matters and reduce the treatment energy consumption of the second oxidation treatment device; the first oxidation treatment device and the biological aerated filter are used for removing small molecular organic matters in reverse osmosis produced water to meet the recycling requirement; the second oxidation treatment device is used for degrading and oxidizing the dye intermediate production wastewater; and the MVR evaporative crystallization device is used for crystallizing and separating out ammonium sulfate in the degraded and oxidized wastewater.

The invention discloses an NMP (N-Methyl Pyrrolidone) wastewater pretreatment process which is characterized in that before the NMP wastewater is subjected to biochemical treatment, persulfate is firstly used for oxidation treatment. According to the method, NMP in the wastewater can be completely treated only by reacting a small amount of oxidizing agent at 80-90 DEG C for about one hour, the NMP in the wastewater is oxidized into organic nitrogen and nitrate nitrogen which can be easily biochemically treated, and subsequent biochemical treatment is facilitated. And moreover, the oxidizing agent can achieve the effect by using a small amount, the residual quantity is extremely low, and secondary treatment is not needed. After the treatment of the process, the residual NMP in the NMP wastewater (equivalent to 30000 ppm) with the concentration of 3% is lower than 200 ppm, the removal rate of the NMP reaches up to 99%, and the NMP can be detected out when exceeding the detection limit to the minimum extent; and the content of residual persulfate can be controlled to be lower than 0.5%.

Provided are a water treatment device and a water treatment method with which it is possible to stabilize the treatment performance of the denitrification treatment in water treatment by performing nitrification treatment, denitrification treatment, and oxidation treatment on water to be treated containing ammonia nitrogen using a carrier that holds microorganisms. This water treatment device (1) is provided with: a nitrification tank (10) for nitrifying water to be treated, which contains ammonia nitrogen, by means of autotrophic bacteria; a denitrification tank (12) for denitrifying the nitrified water in the presence of a hydrogen donor; and an oxidation tank (14) for oxidizing the denitrified water. A nitrification tank (10), a denitrification tank (12), and an oxidation tank (14) are filled with carriers that hold microorganisms, respectively, and trace elements are added to the nitrification tank (10) and the denitrification tank (12), respectively.