674 results about "Dyeing wastewater" patented technology

The invention relates to the technical field of wastewater recovery, in particular to a recovery device and process for reactive dye dyeing wastewater, and the recovery device comprises a tank body which is internally provided with a filter plate and a cleaning assembly, and the cleaning assembly comprises a cleaning plate; the collecting assembly comprises a collecting box mounted above the cleaning plate; the flushing assembly comprises a plurality of groups of connecting rods, and nozzles are mounted on the plurality of groups of connecting rods; the device has the beneficial effects that reactive dye dyeing wastewater is filtered through the filter plate, when the motor drives the cleaning plate to rotate, the elastically arranged scraping plate can scrape residues attached to the surface of the filter plate, the residues are prevented from blocking filter holes in the filter plate, and when the cleaning plate rotates, the residues scraped by the scraping plate are accumulated in the collecting frame, so that the cleaning effect is good. And under the flowing of the water flow, the water flows into the collecting box through the through groove, so that the residues are collected.

The invention provides a method and system for salt separation, evaporation and crystallization of printing and dyeing wastewater, and the method comprises the following steps: sequentially carrying out multi-stage synergistic pretreatment on textile printing and dyeing wastewater to remove suspended solids, degrade organic matters and reduce hardness; the pretreated wastewater is subjected to membrane salt separation treatment, and preliminary separation of salt is achieved through reverse osmosis pre-concentration and nanofiltration salt separation; and respectively carrying out evaporative crystallization treatment on the separated high-concentration salt solution to obtain high-purity sodium sulfate and sodium chloride products. According to the method, the salt recovery rate and the product purity are remarkably improved, the energy consumption and the operation cost are reduced, meanwhile, the problems that in traditional printing and dyeing wastewater treatment, salt is difficult to separate, and the crystallization purity is low are solved, and an innovative solution is provided for high-valued resource recovery of industrial wastewater.

The invention discloses a composite polyacrylamide flocculant based on a nano core-shell structure as well as a preparation method and application of the composite polyacrylamide flocculant. The composite polyacrylamide flocculant is a core-shell structure composite material which takes inorganic nanoparticles grafted with carbon-carbon double bonds on the surface as a core and takes a polyacrylamide copolymer as a shell; the polyacrylamide copolymer is prepared from the following components in parts by mass: 70 to 90 parts of acrylamide, 10 to 30 parts of functional monomer and 0.1 to 1.0 part of cross-linking agent. The basic conception of the flocculating agent provided by the invention is that the structural design of inorganic nano core-organic polymer shell is adopted, PAM molecular chains firmly grow on the surfaces of nano particles in a chemical grafting manner, high dispersion and functional synergy of nano units are realized, and the obtained product has the characteristics of high flocculation speed, dense floc, high removal efficiency and the like, and has a wide application prospect. The method is especially suitable for deep treatment of difficult-to-treat industrial wastewater such as oil-containing wastewater, dye wastewater and heavy metal wastewater.

The invention discloses a printing and dyeing wastewater advanced treatment and salt control recycling process and system, and belongs to the technical field of wastewater treatment. According to the process, the printing and dyeing wastewater is sequentially subjected to pretreatment of grating interception, adjustment and homogenization, and coagulating sedimentation; carrying out hydrolytic acidification and biochemical treatment in a membrane bioreactor; softening treatment of ozone oxidation complex breaking and fluidization crystallization softening; carrying out nanofiltration separation to obtain a permeate and a concentrated solution; carrying out seed crystal fluidization descaling on the concentrated solution; respectively carrying out membrane concentration on the nanofiltration permeate and the descaled concentrated solution through reverse osmosis to obtain sodium chloride and sodium sulfate concentrated solutions; and finally, carrying out evaporation curing treatment on the sludge and the crystallized waste residues. Through multi-step cooperative treatment, deep purification of the printing and dyeing wastewater and efficient separation and recycling of salt are realized, and the problems of impure nanofiltration salt separation and high system scaling risk in the prior art are solved.

The invention discloses a nanocellulose composite aerogel, a preparation method thereof and application of the nanocellulose composite aerogel in wastewater dye adsorption, and belongs to the technical field of water treatment. The preparation method comprises the following steps: blending nano cellulose, a cross-linked polymer and a nano reinforcing material under the assistance of ultrasonic waves to form stably dispersed composite sol; injecting the composite sol into a mold, carrying out pre-freezing, and then carrying out vacuum freeze drying; and immersing the aerogel obtained after freeze drying into a cross-linking agent solution for post-crosslinking treatment, and drying to obtain the nano-cellulose composite aerogel. The nano-cellulose composite aerogel provided by the invention has the beneficial effects that efficient adsorption of cationic dyes and anionic dyes is realized at the same time, and the nano-cellulose composite aerogel is suitable for advanced treatment of printing and dyeing wastewater.

The invention provides a photo-thermal evaporation material based on black titanium dioxide as well as a preparation method and application of the photo-thermal evaporation material. The preparation method comprises the following steps: mixing urea, absolute ethyl alcohol and tetrabutyl titanate into a solution A, mixing absolute ethyl alcohol, ultrapure water and hydrochloric acid into a solution B, dropwise adding the solution B into the solution A, mixing to form a white colloid, heating in a water bath, drying, and calcining in a nitrogen atmosphere to obtain black titanium dioxide powder; the preparation method comprises the following steps: fully mixing a certain amount of black titanium dioxide, sodium alginate and ultrapure water to form a uniform dispersion liquid, dipping the pretreated polyurethane sponge in the dispersion liquid, and crosslinking with a calcium chloride solution to prepare the photo-thermal evaporation material of the black titanium dioxide-calcium alginate composite hydrogel. The photo-thermal evaporation material breaks through the photo-thermal application bottleneck of traditional titanium dioxide, has excellent evaporation rate and seawater desalination performance, and can effectively remove various printing and dyeing wastewater to obtain clean water.

The invention discloses a printing and dyeing wastewater zero-discharge treatment process based on low-pressure high-power membrane concentration and salt separation synergy. The wastewater is sequentially subjected to the steps of double-alkali softening pretreatment, organic pollutant treatment, forward osmosis low-pressure high-power concentration treatment, salt separation treatment and evaporative crystallization. Wherein the forward osmosis low-pressure high-power concentration treatment is performed in a partitioned manner along the flow direction, the osmotic pressure difference is gradually increased, the transmembrane pressure difference is gradually decreased, and interface electrochemical buffer and low-frequency gas-liquid disturbance can be set to inhibit concentration polarization and pollution. Carrying out nanofiltration and salt separation on the concentrated solution to obtain two paths of saline water mainly comprising Na2SO4 and NaCl, and respectively carrying out evaporative crystallization on the two paths of saline water; and refluxing and reusing the water produced by the draw solution. According to the process, high-power concentration and stable salt separation are realized under low mechanical pressure, the energy consumption is reduced, the water recovery rate and the crystal purity are improved, and zero discharge of wastewater is realized.

The invention discloses a wool fiber dyeing method based on an electrostatic spraying technology, and belongs to the field of spinning. The method comprises the following steps: firstly, preparing electrostatic dye liquor containing acid dye; then, the wool fabric is subjected to wetting pretreatment with water; fixing the pretreated wool fabric on a collecting device, and uniformly spraying the dye liquor onto the wool fabric through an electrostatic spraying technology; and finally, carrying out color fixation treatment through open-width steaming to obtain the wool fiber material dyed by the acid dye. The dyeing method greatly reduces the use of water resources and dyeing assistants, greatly reduces the generation of printing and dyeing wastewater, is a green and environment-friendly wool fiber dyeing technology, and has huge application potential in the textile printing and dyeing industry.

The invention discloses peroxidase and application thereof, and relates to the field of bioengineering. The peroxidase POD-8 provided by the invention has very good enzyme activity for oxidizing phenol substrates, especially has the highest enzyme activity for 2, 6-DMP, has very good persistence, and can keep stable enzyme activity within 10 minutes; the resistance to various metal ions is relatively high, and the enzyme activity of 90% or above can still be kept in the presence of various metal ions with various concentrations; the POD-8 has a strong decolorizing capability on a plurality of dyes, especially has a decolorizing efficiency of about 25% on Congo red and amino black 10B in 24 h, and has a good application prospect in the aspect of dye wastewater treatment.

The invention relates to the field of water purifying agents, and discloses a polyaluminum chloride water purifying agent for printing and dyeing wastewater and a preparation method thereof.The polyaluminum chloride water purifying agent for printing and dyeing wastewater is prepared from polyaluminum chloride, an adsorption additive, magnetic composite filler and the balance deionized water; the adsorption additive is prepared by ultrasonically compounding a modified ZIF-8 coated iron material and modified nano titanium dioxide; the modified ZIF-8 coated iron material is prepared by coating nano zero-valent iron with ZIF-8 and carrying out high-temperature carbonization. The modified nano titanium dioxide is prepared by doping and modifying cerium; the magnetic composite filler is prepared by the following steps: pretreating sepiolite by using hydrochloric acid, then coating the surface of the pretreated sepiolite with chitosan by adopting a coprecipitation method, and loading ferroferric oxide particles into the chitosan. Therefore, the usage amount of polyaluminum chloride is reduced, and the water purifying agent is endowed with excellent photocatalytic activity and adsorption effect in printing and dyeing wastewater.

The invention belongs to the technical field of wastewater treatment equipment, and particularly relates to a cloth dyeing wastewater treatment device which comprises a supporting frame, the top end of the supporting frame is obliquely and fixedly connected with a filtering box, the inner wall of the filtering box is fixedly connected with a coarse filtering cylinder, and the side wall of the coarse filtering cylinder is provided with a discharging hole matched with the outlet end of the coarse filtering cylinder. The cloth dyeing wastewater treatment equipment not only has the function of continuously filtering out large impurities in wastewater, but also has the functions of wastewater concentration improvement, wastewater flocculation and acid-base neutralization treatment, the wastewater treatment process has the function of dynamic adjustment, and in addition, due to the fact that dilution of a large amount of filtrate is avoided, the wastewater treatment efficiency is improved. The device can greatly reduce the usage amount of an acid-base neutralizing agent and a flocculating agent, does not need to be matched with a treatment pond, effectively reduces the occupied area of the device, enables wastewater to be continuously injected in the wastewater treatment process, further improves the wastewater treatment continuity and efficiency of the device, and meets the requirements of the printing and dyeing industry for efficiently and economically treating cloth dyeing wastewater.

The present invention relates to the technical field of wastewater treatment equipment, and discloses a textile fabric printing and dyeing wastewater treatment equipment and its treatment method, including a sedimentation tank. A bracket is fixedly connected to the top of the sedimentation tank. A drain pipe is communicated with one side of the sedimentation tank. A motor is fixedly connected to the top of the bracket. It also includes a wastewater treatment mechanism. When the motor is started, the motor drives the rotating shaft to rotate. The rotating shaft drives the reciprocating lead screw to rotate. Limited by the limiting rod, the reciprocating lead screw drives the threaded housing to vertically descend along the outer wall of the reciprocating lead screw. During the descent of the threaded housing, the water inside the sedimentation tank is filtered, so that the water inside the sedimentation tank enters the inside of the threaded housing through the round holes. Due to the arrangement of the activated carbon plate, the water entering the inside of the threaded housing enters the upper end inside the threaded housing through the activated carbon plate. The filtered water inside the threaded housing enters the upper end inside the sedimentation tank through the filter screen, and the preliminarily treated wastewater is obtained.

The invention belongs to the technical field of textile dyeing, and provides a salt-free alkali-free electrostatic spray dyeing method for cellulosic fibers, which comprises the following steps: uniformly mixing polyethylene oxide, reactive dye and solvent to obtain electrostatic dye liquor; the method comprises the following steps: dissolving a cationic modifier and an alkaline color fixing agent in water to prepare a cationic modified solution, padding a cellulose fiber fabric, and drying to obtain a cationic modified cellulose fiber fabric; and spraying the electrostatic dyeing liquid to the surface of the cationic modified cellulose fiber fabric through electrostatic spraying, and carrying out open-width steaming color fixation and cleaning to obtain the electrostatic spraying dyed cellulose fiber fabric. The electrostatic spraying technology is adopted to replace traditional water bath dyeing, excellent K / S value, dye uptake and color fastness can be achieved without consuming a large amount of salt, alkali and water, water resource consumption and environmental pollution are remarkably reduced, and high-salinity and high-chroma printing and dyeing wastewater is avoided.

The invention discloses a preparation method of an iron-manganese bimetallic catalytic material by using copper slag. The preparation method comprises two steps of pretreating the copper slag and preparing the iron-manganese bimetallic catalytic material. The iron-manganese bimetallic catalytic material prepared by the method belongs to a porous material, is rich in pores and large in specific surface area, is rich in Fe < 3 + >, Mn < 3 + >, Mn < 4 + > and other active sites on the surface, has the advantages of high catalytic activity, good stability and environmental friendliness, and realizes reduction and high-value utilization of the copper slag. In addition, the prepared iron-manganese bimetallic catalytic material can be used for catalyzing persulfate to form an advanced oxidation system, and is suitable for degradation treatment of organic wastewater such as printing and dyeing wastewater, pharmaceutical wastewater, food wastewater and raffinate.

The invention discloses a graphene oxide-chitosan-carboxymethyl cellulose composite aerogel and an application of the graphene oxide-chitosan-carboxymethyl cellulose composite aerogel in adsorption of amaranth. The preparation method comprises the following steps: mixing a carboxymethyl cellulose aqueous solution with a chitosan acetic acid solution, adding gallic acid, stirring until the gallic acid is completely dissolved, adding the graphene oxide dispersion liquid, and stirring until a system forms uniform and stable gel; the gel is firstly subjected to ultralow-temperature freezing and then subjected to freeze drying, and finally the graphene oxide-chitosan-carboxymethyl cellulose composite aerogel is obtained. The aerogel prepared by the method is environment-friendly and stable in pore structure, and is a composite aerogel material with high adsorption capacity and good regeneration performance on anionic dyes. The adsorption capacity of the aerogel to amaranth can reach 125 mg / g, the adsorption rate is still kept at 77% after the aerogel is recycled for 3 times, and the aerogel is suitable for efficient treatment of dye wastewater.

The invention relates to the technical field of waste silk recycling, in particular to a textile printing and dyeing wastewater treatment device and method.The textile printing and dyeing wastewater treatment device comprises a treatment pond, a partition plate is fixedly installed in the treatment pond to divide the interior of the treatment pond into a filtering pond and a settling pond, and a waste silk filtering assembly is rotatably installed in the filtering pond; a material guide assembly is rotationally mounted on the bottom surface in the filter tank; a mixing tank is arranged on the outer side, close to the filter tank, of the treatment tank. Through the synergistic effect of the waste silk filtering assembly and the material guiding assembly, solid waste silk in waste water can be efficiently separated and automatically recycled, the rotary type filtering plates automatically switch the working state in the continuous filtering process, after one filtering plate completes filtering operation, the filtering plate can be driven by a servo motor to rotate to the vertical position, and the waste silk in the waste water can be automatically recycled. At the moment, a winding needle in the waste silk recycling assembly moves back and forth along the surface of the filter plate to recycle waste silk left on the surface of the filter plate, the problem that a traditional fixed filter screen is prone to being blocked is solved, and automatic recycling of the waste silk can be achieved.

The invention provides a printing and dyeing wastewater concentration method and system, and the method comprises the steps: carrying out pretreatment on desizing wastewater, so that suspended particles and colloidal impurities in the wastewater are intercepted and adsorbed by a filtering medium; carrying out buffering and flow regulation on the pretreated wastewater, and meanwhile, carrying out heat exchange on hot condensate water generated in the printing and dyeing production process and the pretreated wastewater; raising the temperature of the wastewater to 40 DEG C or above; pressurizing the heated wastewater and then carrying out membrane separation and concentration treatment, forming dialysate by micromolecular substances and part of water, and gradually accumulating intercepted macromolecular substances to form concentrated solution; when the concentration of the concentrated solution reaches the discharge standard, pollutants are treated by adopting a chemical precipitation method and a biological treatment method, or useful substances are recycled. The wastewater concentration process flow is optimized, the wastewater is filtered, intercepted and adsorbed through multiple media, a good water inlet condition is provided for concentration treatment, modified starch and PVA in the wastewater are effectively concentrated, and the follow-up treatment volume and difficulty are reduced.

The invention provides a dye / ion separation membrane with pore diameter and charge coordinated regulation and control as well as a preparation method and application thereof, and belongs to the field of preparation of a double-layer ionic covalent organic framework (COFs) composite membrane. An aromatic polyamide ultrafiltration membrane is used as a base membrane, and a double-layer COFs membrane is constructed on the surface of the aromatic polyamide ultrafiltration membrane through a multi-time interfacial polymerization method. The first layer is a positive charge COFs layer formed by reacting a guanidyl monomer with 1, 3, 5-triformyl phloroglucinol (Tp); and the second layer is a negative charge COFs layer formed by reacting ionic aromatic diamine with Tp. By adjusting the type and concentration of the monomers, the pore diameter and charge distribution of the film layer can be synergistically regulated and controlled, and the double-layer composite film which is stable in structure and orderly stacked is constructed. The obtained membrane has molecular sieve separation and electrostatic regulation functions, can efficiently intercept organic dye molecules in high-salt printing and dyeing wastewater, and has high flux, high selectivity and good chemical stability.

The invention relates to an advanced oxidation printing and dyeing wastewater treatment process, and belongs to the technical field of sewage treatment. The method comprises the following steps: adding an aluminum oxide catalyst into to-be-treated printing and dyeing wastewater in a reactor, and stirring; adding an auxiliary agent, and mixing and stirring; adding an oxidizing agent potassium monopersulfate into the obtained mixed solution and stirring; under the irradiation of an ultraviolet light source, continuously introducing ozone prepared by an ozone generator into the reactor for stirring reaction. Pollutants such as refractory dyes and organic auxiliaries in the printing and dyeing wastewater are efficiently removed under mild conditions, the COD removal rate of effluent reaches 90% or above, the chroma removal rate reaches 90% or above, and the quality of the effluent meets the requirements of subsequent treatment or up-to-standard discharge.

The invention relates to the technical field of industrial wastewater treatment and resource recovery, discloses a printing and dyeing wastewater desizing water alkali recovery method, and solves the problem of low recovery treatment efficiency caused by serious membrane pollution when printing and dyeing desizing wastewater is treated by an existing membrane separation technology. The method comprises the following steps: carrying out homogenization and dissolved air flotation pretreatment on high-temperature desizing water to remove most of grease and suspended solids; then, clear liquid is filtered through an ultrafiltration membrane, a negative pressure environment is constructed on the membrane shell side to extract penetrating fluid in real time, meanwhile, fine bubbles are injected into feeding liquid to form gas-liquid two-phase flow, and the net pushing force of the membrane surface is controlled to be maintained in a 0.02-0.04 MPa micro-positive pressure interval so as to reduce membrane pollution; and carrying out nanofiltration purification on the primarily filtered water to finally obtain high-purity recovered alkali liquor. According to the invention, the problems of serious membrane pollution and fast flux attenuation in the traditional membrane treatment process are effectively solved, and efficient recovery of alkali and long-term stable operation of the system are realized.

The present invention relates to the field of multi-stage wastewater treatment, specifically a textile and textile printing and dyeing wastewater treatment device and method. It includes a treatment box, a drug barrel and a drug-adding and mixing mechanism; the treatment box includes a box body and a diverter with two ends integrally connected to the middle and bottom of the box body, a filter assembly is arranged inside the diverter, the top of the box body is connected to a water inlet pipe, the bottom side is connected to a drain pipe, and a control valve is arranged on the drain pipe; the drug barrel is arranged on the top of the treatment box; the drug-adding and mixing mechanism includes a drug delivery barrel vertically slidingly arranged on the drug barrel, a lifting mechanism for driving the drug delivery barrel to rise and fall, a lifting member arranged at the bottom end of the drug delivery barrel, and a plurality of baffles rotatably arranged on the lifting member, the drug delivery barrel has a drug inlet hole and a drug outlet hole located below the drug inlet hole, and the outer periphery of the lifting member has a plurality of flow channels. The present invention can cyclically carry out multiple mixing, flocculation and filtration treatments of wastewater and drugs, and finally discharge the effectively treated wastewater, thereby ensuring the quality of wastewater treatment.

The invention relates to the field of wastewater multi-stage treatment, in particular to a woven fabric printing and dyeing wastewater treatment device and method. The device comprises a treatment box, an agent barrel and an agent adding and mixing mechanism, the treatment box comprises a box body and a shunting part with two ends integrally communicated with the middle and the bottom of the box body respectively, a filtering assembly is arranged in the shunting part, the top end of the box body is communicated with a water inlet pipe, and the side surface of the bottom end is communicated with a drainage pipe which is provided with a control valve; the medicament barrel is arranged at the top of the treatment box; the medicine feeding and mixing mechanism comprises a medicine conveying barrel vertically arranged on the medicine barrel in a sliding mode, a first lifting mechanism driving the medicine conveying barrel to ascend and descend, a lifting piece arranged at the bottom end of the medicine conveying barrel and a plurality of blocking plates rotationally arranged on the lifting piece, the medicine conveying barrel is provided with a medicine inlet hole and a medicine outlet hole located below the medicine inlet hole, and a plurality of circulation channels are formed in the periphery of the lifting piece. According to the invention, mixed flocculation and filtration treatment of wastewater and chemicals can be circularly carried out for multiple times, and finally, the effectively treated wastewater is discharged, so that the wastewater treatment quality is ensured.

The utility model provides a printing and dyeing wastewater recycling device, and belongs to the technical field of printing and dyeing wastewater recycling. The printing and dyeing wastewater recycling device comprises a tank body, a cavity is formed in the tank body, a water inlet is formed in the left side of the tank body, a pressure pump is mounted on the surface of the water inlet, an automatic dosing mechanism comprises a sliding rail, a dosing box, a rotating cavity and a passing cavity, and the sliding rail is fixedly mounted at the top of the inner wall of the cavity. The automatic dosing mechanism is arranged, the booster pump is started, waste water is pumped into the tank body, the dosing box is arranged on the side, close to the water inlet, in the tank body, so that the waste water impacts the dosing box, medicine powder neutralized with the waste water is stored in the inner cavity of the dosing box, the dosing box vibrates through the impact force of the waste water, and the medicine powder is fully added into the tank body. And the medicine powder in the inner cavity of the medicine adding box falls into the rotating cavity after passing through the passing cavity and is neutralized with the wastewater, so that manual medicine adding is not needed.

The invention discloses a tetrathiomolybdate intercalated ternary iron-magnesium-zinc layered double hydroxide catalyst, a preparation method thereof and an application of the tetrathiomolybdate intercalated ternary iron-magnesium-zinc layered double hydroxide catalyst in degrading azo dyes by activating peroxymonosulfate. According to the method, a carbonate intercalated ternary LDH precursor is synthesized through a hydrothermal reaction, interlayer anions are replaced with nitrate and tetrathiomolybdate through ion exchange, and the target catalyst is obtained. In the catalyst, a unique Fe-Mg-Zn ternary metal laminate and a MoS < 2-> intercalation structure cooperatively construct a multi-active center, and MoS < 2-> is used as an electron donor to promote cyclic regeneration of Fe < 3 + > / Fe < 2 + >. The catalyst keeps ultrahigh activity in a wide range of pH (potential of hydrogen) of 3-9, can completely degrade 10 mg / L of acid orange 7 within 5 minutes, and is stable in structure and low in metal dissolution risk. The problems of low activity, slow Fe < 3 + > reduction, metal ion dissolution and the like under neutral and alkaline conditions in an advanced oxidation technology based on peroxymonosulfate are solved, and the method has important application value in the field of printing and dyeing wastewater treatment.

The utility model relates to a printing and dyeing wastewater filtering device which comprises a filtering box and a filtering plate, the top of the filtering box communicates with a water inlet pipe, the filtering plate is connected to the filtering box, the top of the filtering plate is connected with a scraping plate, and the bottom of the scraping plate makes contact with the top of the filtering plate; the moving assembly is used for driving the scraper to be slidably connected to the top of the filter plate in the length direction of the filter plate, and collecting boxes are connected to the two sides of the filter plate in the length direction. When impurities exist on the top of the filter plate, the moving assembly drives the scraper to move in the length direction of the filter plate, the scraper pushes the impurities on the top of the filter plate, the impurities are pushed by the scraper to move to the collecting box, the impurities on the top of the filter plate are reduced, blockage of the filter plate is avoided as much as possible, and the filtering efficiency is improved.

The invention relates to a method for preparing a magnetic Fe3O4 / Cu / nitrogen-doped carbon composite material by a one-step method and an application of the magnetic Fe3O4 / Cu / nitrogen-doped carbon composite material, and aims to solve the problems of poor catalytic activity, complex separation and recovery and complex synthesis method of the existing PMS activated catalytic material. According to the method, melamine is selected as a carbon source and a nitrogen source, ferric nitrate and copper sulfate are selected as an iron source and a copper source respectively, and the magnetic Fe3O4 / Cu / nitrogen-doped carbon composite material is synthesized in one step by adopting a high-temperature pyrolysis method. The adsorbent not only has excellent adsorption performance on dye-methylene blue, but also can realize high-efficiency oxidative degradation. The magnetic Fe3O4 / Cu / nitrogen-doped carbon composite material prepared by the invention not only has excellent catalytic performance, but also is easy to magnetically separate and recycle, and is suitable for efficient treatment of dye wastewater. The method is applied to the field of catalytic degradation of wastewater.

The invention relates to the technical field of wastewater treatment, and discloses a dynamic circulation type chitosan column azo dye wastewater treatment system which comprises an integrated reaction column which is vertically arranged, a water inlet is formed in the bottom of the integrated reaction column, a water outlet is formed in the top of the integrated reaction column, and a composite functional fiber felt of a roll-shaped structure is arranged in the integrated reaction column. An inert anode is arranged in the center of the interior of the integrated reaction column, the composite functional fibrofelt is used as a distributed cathode, azo dye wastewater enters the integrated reaction column from a water inlet, dye molecules in the wastewater are adsorbed by the composite functional fibrofelt and then are discharged from a water outlet, and the wastewater is recycled. The composite functional fiber felt comprises a modified chitosan component used for adsorbing azo dye, a conductive component enabling the composite functional fiber felt to have conductivity, and a piezoelectric component capable of generating an electric field under mechanical stress. Two output contacts of the electric field applying device are respectively connected with the inert anode and the distributed cathode, and the electric field applying device is used for applying an electric field in a regeneration stage; provided is a mechanical vibration applying device. The adsorption-regeneration-degradation process is integrated in a single reactor, and in-situ self-cleaning and function recovery are achieved through self-sensing and intelligent control. The problem that in the prior art, after the adsorption column is saturated, off-line regeneration or replacement is needed is thoroughly solved.

The present invention relates to the field of water pollution treatment technology, and in particular to a polyester low-elastic silk printing and dyeing wastewater treatment device. Its technical solution includes: a pre-treatment component, including a secondary connecting pipe, one end of the secondary connecting pipe is fixedly installed with a main pipeline, the interior of the main pipeline is fixedly installed with a spiral guide plate, the interior of the main pipeline has printing and dyeing wastewater flowing along the spiral guide plate, and the interior of the secondary connecting pipe is fixedly installed with a filter cartridge, the filter cartridge adopts a trumpet-shaped structure, and its diameter gradually increases from the head end to the tail end. The present invention allows the printing and dyeing wastewater to flow in a spiral along the secondary connecting pipe, and the fiber fragments and agglomerated pulp on the outer wall of the filter cartridge are driven by the printing and dyeing wastewater to continue to move, thereby bringing the fiber fragments and agglomerated pulp to the tail end of the filter cartridge. At the same time, when the printing and dyeing wastewater flows through the filter holes along the tangential direction of the filter cartridge, the blockage in the filter holes of the filter cartridge is brought out to avoid affecting the filtering effect of the filter cartridge.

The invention relates to the field of seawater desalination, and discloses a bamboo fiber aggregate solar interface evaporator with an open water transportation channel and a preparation method and application thereof. The preparation method comprises the following steps: selecting a bamboo tube with two open ends, cutting off bamboo green at the upper end, and reserving partial bamboo green at the bottom; sequentially treating the bamboo tube with sodium hydroxide and hydrogen peroxide to obtain a dispersed vascular bundle bamboo tube; and modifying the surface of the dispersed vascular bundle bamboo tube with a photo-thermal absorption material, and cleaning to obtain the bamboo fiber aggregate solar interface evaporator. The evaporation rate under standard sun illumination reaches 3.376 kg.m <-2 >. H <-1 >, the apparent evaporation efficiency is about 150%, and stable evaporation can still be kept without salt crystallization under the high-salinity condition. The ion concentration of the obtained condensate water is far lower than the original seawater level, the obtained condensate water meets the drinking water standard of the World Health Organization, meanwhile, organic pollutants in dye wastewater can be effectively removed, and the functions of seawater desalination and wastewater purification are achieved.

The invention belongs to the technical field of wastewater treatment, and particularly relates to an adsorption particle electrode for wastewater and waste liquid treatment and a preparation method thereof. The preparation method comprises the following steps: adding a zinc salt, a vanadium salt, a scandium salt and cetyltrimethylammonium bromide into water, stirring, adjusting the pH value at 70-80 DEG C, continuously stirring, filtering, drying and calcining to obtain modified mesoporous zinc oxide; and dispersing the modified mesoporous zinc oxide in water, adding the composite aerogel, soaking, filtering, washing, drying and grinding to obtain the adsorption particle electrode. The adsorption particle electrode prepared by the invention can be used for degrading printing and dyeing wastewater, and has the excellent performances of high degradation rate, high degradation speed, reusability and the like.