516 results about "Industrial effluent" patented technology

The invention provides an electroplating wastewater dosage prediction system based on a dynamic flow-concentration coupling model, and relates to the technical field of industrial wastewater treatment.The electroplating wastewater dosage prediction system is characterized in that the dynamic flow-concentration coupling model is established by collecting real-time flow and heavy metal ion concentration parameters of a wastewater treatment system; the method comprises the following steps: identifying a time-lag relationship and coupling strength between flow change and concentration fluctuation, generating a flow-concentration coupling strength matrix, constructing a dosage prediction curve by adopting a piecewise linear mapping method on the basis of the matrix, performing matching positioning on a current flow-concentration coupling state, and performing gradient pulse dosage parameter prediction by applying a gradient pulse dosage parameter prediction technology. And the dosage of the medicament can be accurately predicted. Therefore, the problems that the removal rate of partial heavy metals is reduced, the medicament utilization rate is low, and even secondary pollution is possibly caused or the operation cost is obviously increased due to the fact that the adding amount and the adding time sequence of various medicaments are difficult to adjust timely and accurately can be solved.

The utility model relates to the technical field of sludge treatment, in particular to industrial wastewater sludge treatment equipment, which comprises an equipment main body, a dewatering box, a water pump arranged on the side surface of the dewatering box, and a water tank, the dewatering assembly comprises a filter screen plate arranged on the inner wall of the dewatering box in a sliding mode and a hydraulic rod fixedly arranged on the inner bottom wall of the dewatering box, the telescopic end of the hydraulic rod is fixedly connected with the lower surface of the filter screen plate, and a sealing cover plate is arranged on the upper surface of the dewatering box. According to the sludge dewatering device, the sludge pushing assembly and the triggering assembly are arranged, after the filter screen plate moves upwards to extrude and dewater sludge, dewatered sludge blocks can be driven to be automatically moved out of the dewatering box, and finally the driving motor is started to automatically and fully discharge the sludge blocks; further, the equipment breaks through the mode of dewatering the sludge by extruding from top to bottom in the prior art, and the defect that intercepted sludge blocks cannot be quickly discharged in the prior art is effectively overcome.

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

The invention relates to the technical field of industrial wastewater treatment, and discloses an efficient two-stage reverse osmosis petroleum coke water treatment system, which comprises pretreatment execution ends, a reverse osmosis core end, a concentration regeneration end and an intelligent control end which are commonly configured with a data feedback module. A step-by-step mechanism is established at the initial stage of wastewater treatment, quartz sand is adopted to intercept large-particle suspended solids, activated carbon is adopted to adsorb and degrade organic matters, softening resin is adopted to replace and remove scaling ions, ozone is adopted to catalyze, oxidize and decompose refractory pollutants, an oxidation-reduction potential dynamic regulation and control mechanism is innovatively introduced, and the dosage of an oxidizing agent is automatically regulated according to water quality and chemical quality; by means of the design, the blocking problem caused by high-hardness waste water is solved, the membrane is prolonged, the solution period is stably solved, the chemical cleaning frequency and agent consumption are reduced, a pollution early warning and closed response linkage mechanism is constructed, membrane damage caused by manual intervention delay is avoided, and the service life of membrane elements is prolonged and reduced.

The invention discloses a preparation method and application of phytic acid modified zero-valent iron. The method comprises the following steps: (1) mixing phytate and liquid phytic acid according to a molar ratio of (5: 5)-(8: 2), and preparing a buffer solution with the concentration of 0.05-0.5 mol / L; (2) adding micron or nano zero-valent iron into a buffer solution according to a solid-to-liquid ratio of 1: 10 to 1: 50 (g / mL), and transferring to a polytetrafluoroethylene reaction kettle; (3) under the protection of nitrogen, reacting for 6-48 hours under the conditions that the temperature is 20-80 DEG C and the oscillation rate is 100-1000 rpm, and controlling the pH value to be 3.5-5.5; and (4) after the reaction, carrying out suction filtration, ethanol-water alternate washing and vacuum drying to prepare the modified zero-valent iron with the surface coated with the phytic acid iron complex. A stable chelation layer is formed on the surface of phytic acid molecules and zero-valent iron, the oxidation resistance, dispersity and heavy metal adsorption capacity of the material are remarkably improved, and the material is suitable for efficient repair of industrial wastewater.

The invention discloses alkali-producing cadmium-tolerant acinetobacter capable of increasing the pH value of soil and application of the alkali-producing cadmium-tolerant acinetobacter, and belongs to the technical field of microorganisms, the alkali-producing cadmium-tolerant acinetobacter is preserved in the China General Microbiological Culture Collection Center (CGMCC), the number of the alkali-producing cadmium-tolerant acinetobacter is CGMCC No.33619, and the alkali-producing cadmium-tolerant acinetobacter belongs to proteobacteria and pseudomonas. The strain can increase the environmental pH value from 6.0 to 8.0 through metabolism, and stably grows in an environment with the cadmium (Cd < 2 + >) concentration as high as 20 ppm. The strain can be applied to the fields of acid soil improvement, cadmium pollution remediation, industrial wastewater treatment, fermentation engineering and the like. The method has the advantages of being environmentally friendly, efficient, stable, applicable to multiple scenes and the like, and a novel microbial resource is provided for heavy metal pollution treatment and soil ecological restoration.

The invention belongs to the field of industrial wastewater treatment, and relates to an iron autotrophic denitrification coupling anaerobic ammonia oxidation combined enrichment culture device and method. Comprising a water inlet tank, a No.1 anoxic reactor, an intermediate tank and a No.2 anaerobic reactor, the water inlet tank is provided with a water outlet pipeline of the water inlet tank, and the water outlet pipeline of the water inlet tank is connected with the No.1 anoxic reactor; the anoxic reactor I is provided with a water outlet pipeline of the anoxic reactor I, and the water outlet pipeline of the anoxic reactor I is connected with the intermediate tank; the intermediate tank is provided with an intermediate tank water outlet pipeline, and the intermediate tank water outlet pipeline is connected with the No.2 anaerobic reactor; the No.2 anaerobic reactor is provided with a No.2 anaerobic reactor water outlet pipeline; the No.2 anaerobic reactor water outlet pipeline is connected with the No.1 anoxic reactor. According to the invention, collaborative culture of autotrophic denitrification bacteria and anaerobic ammonium oxidation bacteria can be realized, an autotrophic denitrification effect provides a certain amount of nitrite and iron ions to promote anaerobic ammonium oxidation reaction, and an anaerobic ammonium oxidation effect can effectively prevent an autotrophic denitrification tank body from being mineralized.

The invention belongs to the technical field of industrial wastewater treatment and resource recovery, and particularly relates to an enhanced treatment method for recovering fluorine resources in semiconductor processing fluorine-containing wastewater. And step-by-step efficient recovery of sodium fluosilicate and calcium fluoride is realized through cooperation of precipitant compounding and pH regulation. The method comprises the following steps: firstly, adding a NaCl-NaHCO3 composite precipitator and sodium fluosilicate seed crystals to induce crystallization and recover hexagonal prism-shaped sodium fluosilicate single crystals; and after filtering, adding a CaCl2-Ca (OH) 2 composite precipitator and calcium fluoride seed crystals into the filtrate to generate large-particle calcium fluoride. And the impurity content in the recovered product respectively reaches the industrial sodium fluosilicate superior product standard and the metallurgical grade calcium fluoride secondary product standard. And the treated wastewater is neutral or weakly alkaline, so that the subsequent mixed treatment with other wastewater is facilitated.

The present invention relates to a method for removing organic pollutants in water by activating sulfite with Fe-N-C, belonging to the technical fields of new catalyst materials and environmental purification technologies. An iron salt and a carbon-nitrogen precursor are added to an organic solvent, and the iron salt and the carbon-nitrogen precursor form a complex. Then, the organic solvent is removed to obtain a dry powder. The dry powder is calcined under a protective atmosphere, and after carbonization, an Fe-N-C catalyst is obtained. The present invention solves the bottleneck problem of low efficiency in traditional heterogeneous sulfite activation technology due to few reactive sites and slow oxygen mass transfer by constructing carbon-based metal active sites with oxygen-rich properties. This catalytic oxidation method has high treatment efficiency and simple operation, has a wide pH application range, strong anti-ion interference ability, and high reusability, and has broad application prospects in the field of actual industrial wastewater treatment.

The invention belongs to the technical field of polymer composite materials, and relates to a multilayer solar interface evaporator and a preparation method thereof. The evaporator comprises a photo-thermal layer, a connecting layer and a supporting layer, the photo-thermal layer combines biomass material-carbonized loofah powder with high polymer material polyacrylonitrile, a photo-thermal film with photo-thermal conversion capacity is prepared through the electrostatic spinning technology, and polyaniline grows on the surface of the photo-thermal film in situ so as to improve the photo-thermal efficiency; the connecting layer adopts a loofah sponge fiber skeleton, so that the layers are tightly combined; the supporting layer selects polyamide 6 as a foaming material and bamboo charcoal powder as a functional filler, and the polyamide 6-bamboo charcoal powder foam supporting layer is prepared by utilizing a solution foaming technology and has the functions of heat insulation, water delivery and dye adsorption. The photo-thermal layer and the supporting layer are integrated through the connecting layer to prepare the multi-layer solar interface evaporator, efficient photo-thermal evaporation, high dye adsorption rate and long cycle life are achieved, and the multi-layer solar interface evaporator has the advantages of being environmentally friendly, low in cost and stable in performance and has application prospects in the fields of seawater desalination and industrial wastewater treatment.

The invention discloses a short-process coagulation water purification treatment method and equipment based on a polytetrafluoroethylene membrane. The method relates to the technical field of short-process coagulation water purification treatment, and comprises the following steps: firstly, adding an agent into the electronic industrial wastewater to complete pretreatment, then filtering by adopting a polytetrafluoroethylene membrane to realize water purification, continuously collecting and analyzing short-process coagulation water purification data of the electronic industrial wastewater, and timely optimizing and adjusting a treatment scheme. Pollutants in a water body are converted into micro-flocs by adding a medicament, the micro-flocs are intercepted by a polytetrafluoroethylene membrane to remove the pollutants in the water body, a real-time monitoring sensor collects water quality data and membrane operation data, and a short-process coagulation quality quantized value and a purification accuracy quantized value are obtained through further analysis. Compared with a judgment value in a database, the method optimizes a medicament adding scheme and a membrane operation scheme, improves the process applicability, and solves the problems of insufficient accuracy and adaptability of a short-process water purification treatment method in the prior art.

The invention discloses an activated carbon-based fluorine removal agent and a preparation method thereof, and relates to the technical field of water treatment. The activated carbon-based fluorine removal agent comprises the following raw material components in parts by mass: 50-70 parts of activated carbon, 10-20 parts of nano aluminum hydroxide, 5-15 parts of chitosan, 3-8 parts of calcium chloride, 2-8 parts of polyvinyl alcohol, 3-5 parts of sodium carboxymethyl cellulose and 6-12 parts of polyethyleneimine. According to the invention, the active carbon, the nano aluminum hydroxide, the chitosan, the calcium chloride and other materials are subjected to composite modification, so that the adsorption performance of the fluorine removal agent on fluorine ions is greatly improved, and the prepared fluorine removal agent has the characteristics of rapid adsorption and high adsorption capacity, and also has excellent cycle stability and long-term storage stability. The preparation process is simple, the cost is low, the obvious environmental protection advantage is achieved, the novel activated carbon-based fluorine removal agent has wide application prospects in the fields of drinking water treatment, industrial wastewater treatment and the like, and an efficient solution is provided for high-fluorine water treatment.

The invention provides a preparation method of nanotube-shaped BiO (CH3COO). The preparation method comprises the following steps: dispersing Bi (NO3) 3.5 H2O in a PVP (Polyvinyl Pyrrolidone) aqueous solution; adding NaAc powder into the solution, and reacting at room temperature; and after the reaction is finished, centrifuging, washing and drying to obtain the nano-tube-shaped BiO (CH3COO). The invention also provides an application of the nanotube BiO (CH3COO) as a catalyst in photocatalytic energy conversion and environment purification. The method disclosed by the invention is simple to operate, and highly crystallized nanotube-shaped BiO (CH3COO) can be obtained at room temperature only by adding a small amount of PVP (Polyvinyl Pyrrolidone); the nanotube BiO (CH3COO) shows remarkable oxidation-reduction performance on CO2 reduction coupling TC oxygenolysis under ultraviolet excitation, and is expected to have potential application prospects in the fields of energy crisis relief and industrial wastewater treatment.

The invention discloses a nitrogen-doped carbon nanotube modified magnetic pyrite composite catalyst as well as a preparation method and application thereof, and belongs to the technical field of water treatment. The nitrogen-doped carbon nanotube modified magnetic pyrite composite catalyst is prepared from the following raw materials: multi-walled carbon nanotubes, a concentrated nitric acid solution, melamine, magnetic pyrite powder and sodium percarbonate. According to the preparation method, magnetic pyrite and nitrogen-doped carbon nanotubes are mixed according to the ratio of 15: 1, nitrogen heat treatment is performed for 3 h at the temperature of 600 DEG C to form a composite carrier, and then activation treatment is performed through sodium percarbonate to obtain the catalyst. According to the catalyst, the electron transfer capacity and adsorption performance are enhanced through the nitrogen-doped carbon nanotubes, Fe < 2 + > / Fe < 3 + > circulation of the magnetic pyrite is cooperated, and the dual effects that sodium percarbonate is efficiently activated to generate free radicals to degrade pollutants and rapid recovery is achieved through magnetism can be achieved. The catalyst prepared by the invention is suitable for deep treatment of organic matters and heavy metals in industrial wastewater, and has the advantages of wide pH adaptation range, no secondary pollution and recyclability.

The invention belongs to the technical field of industrial wastewater purification, and discloses a membrane-free single-tank water electrolysis hydrogen production-electroplating wastewater enrichment coupling method and device, and the method comprises the following steps: injecting a neutral electroplating wastewater mixed solution into a membrane-free single tank; discharging air in the membrane-free single tank, and heating the neutral electroplating wastewater mixed solution to a preset temperature; direct current is firstly introduced into the heated neutral electroplating wastewater mixed solution, so that metal ions in the neutral electroplating wastewater mixed solution migrate to the hydrogen evolution electrode, then the direct current is converted into pulse current, so that the metal ions deposit on the hydrogen evolution electrode, and hydrogen precipitated on the hydrogen evolution electrode is continuously collected; closing the current, taking out the hydrogen evolution electrode and collecting metal ions on the hydrogen evolution electrode; and adding an oxygen evolution catalyst into the membrane-free single tank, starting the magnetic rotor to carry out oxygen evolution reaction, and taking out the oxygen evolution catalyst until bromate in the neutral electroplating wastewater mixed solution is completely reduced. According to the invention, the preparation of high-purity hydrogen and oxygen and the enrichment of metal ions can be realized.

The invention relates to the technical field of fermentation industrial wastewater treatment, and particularly discloses a white spirit production wastewater treatment process and system. The system comprises a pretreatment unit, an anaerobic treatment unit, a denitrification unit, a multi-stage biochemical treatment unit, an advanced treatment unit, a sludge treatment unit and a backwashing water recovery unit which are connected through a corrosion-resistant pipeline, a variable frequency pump body and a control valve group. The method comprises the following steps: homogenizing water quality and water quantity through an adjusting tank, adjusting the pH value through a neutralizing tank, pretreating through a microfilter and an air flotation device, sequentially feeding into a hydrolysis acidification tank and a two-stage UASB reactor to degrade organic matters, reducing nitrogen concentration through a denitrification unit, deeply degrading pollutants through a multi-stage biochemical system, and finally realizing up-to-standard discharge through magnetic coagulation phosphorus removal and decoloration treatment. The sludge is subjected to resource utilization after being concentrated and dehydrated, and backwashing water and filtrate are recycled and retreated. The system is high in treatment efficiency, low in operation cost, high in resource recovery rate, stable in effluent and suitable for wastewater treatment of various white spirit production enterprises.

The invention relates to a reversible hydrophilic / hydrophobic magnetic biomass foam material as well as a preparation method and application thereof. According to the magnetic biomass foam material, biomass waste is adopted as a matrix, a zinc chloride / phosphoric acid / ammonium dihydrogen phosphate three-component eutectic solvent is used for processing and preparing nano cellulose under the room temperature condition, a normal-pressure foaming technology is used, lauryl sodium sulfate, titanium dioxide and a ferroferric oxide modified solution are introduced, and the magnetic biomass foam material is prepared. The preparation method comprises the following steps: preparing a magnetic biomass foam material, adding a methyltrimethoxysilane / tetramethoxysilane copolymer emulsion, carrying out low-temperature gradient drying to prepare the magnetic biomass foam material in one step, and regulating and controlling an interface group through a water / ethanol solvent to realize on-demand switching of hydrophilic / hydrophobic properties of the magnetic biomass foam material. The problems that a biomass foam material is single in function and complex in preparation process are effectively solved, the purpose of efficient separation and removal of hydrophilic / hydrophobic pollutants in industrial wastewater is achieved, the removal rate is 98% or above, the preparation method is simple, and high application value is achieved.

The invention discloses organic industrial wastewater treatment equipment and a treatment method, and relates to the technical field of wastewater treatment. The medicine mixing assembly comprises a tank body, and a stirring assembly and a guide frame are arranged in the tank body; the guide frame is fixedly mounted at the bottom of the inner side of the tank body; the stirring assembly comprises a first rotating rod; a cross rod is fixedly mounted on the first rotating rod; second rotating rods are movably mounted in the two double-round-head grooves; a first gear is cooperatively mounted at the top; a first toothed plate is arranged on one side of the first gear and fixedly installed on the top of the transverse rod. In the stirring process, two second rotating rods revolve along a guide frame through a cross rod, and meanwhile, connecting plates at the bottoms of the second rotating rods move along rolling grooves in the guide frame through guide wheels, so that the second rotating rods move along double-round-head grooves formed in the cross rod, and the positions of the first stirring frame and the second stirring frame are changed; and the two stirring frames are ensured to fully mix and stir impurities and chemicals in the wastewater.

The invention relates to the technical field of preparation of high polymer materials and intelligent response materials, in particular to a preparation method of polyacrylamide for treatment. And constructing a quaternary polymerization system with acrylamide, a temperature-sensitive monomer and a zirconium-based metal organic framework-graphene quantum dot composite material. Magnetic response interpenetrating network gel is formed by induction of a photo-magnetic synergistic field, bacterial cellulose nanofibrils and a calcium silicate layered structure are introduced through a biomimetic mineralization technology, and the hierarchical porous carrier is prepared by combining a microfluidic crushing technology and a supercritical drying technology. Finally, through an intelligent regeneration mechanism of bimetal coordination activation and high-frequency magnetic field triggering, the material is endowed with multiple stimulation response characteristics, high adsorption capacity and in-situ regeneration capacity, and the mechanical strength and the salt resistance are remarkably improved through a pearl-layer-like micro-nano laminated structure. The method is suitable for industrial wastewater advanced treatment and emergency pollution repair scenes.

The invention belongs to the field of industrial wastewater treatment, and relates to a combined enrichment culture device and method for autotrophic denitrifying bacteria. The device comprises a water inlet tank, a No.1 anaerobic reactor, a reflux tank and a No.2 anoxic reactor, the water inlet tank is provided with a water outlet pipeline of the water inlet tank, and the water outlet pipeline of the water inlet tank is connected with the No.1 anaerobic reactor; the first anaerobic reactor is provided with a first anaerobic reactor water outlet pipeline, and the first anaerobic reactor water outlet pipeline is connected with the reflux tank; a return tank water outlet pipeline is arranged at the upper part of the return tank, a return tank return pipeline is arranged at the bottom of the return tank, the return tank water outlet pipeline is connected with the second anoxic reactor, and the return tank return pipeline is connected with the first anaerobic reactor; a second anoxic reactor reflux pipeline is arranged at the bottom of the second anoxic reactor and is connected with the lower part of the reflux tank. The anaerobic ammonia oxidation reaction and the denitrification reaction promote each other, so that the anaerobic ammonia oxidation reaction can be quickly started, and the sludge leakage phenomenon is effectively avoided.

The invention relates to a reverse osmosis membrane pollution control method based on green biological scale inhibition, which is especially suitable for reverse osmosis membrane pollution treatment in an industrial wastewater zero discharge system. The method comprises the following steps: regulating and controlling the composition of organic components of inlet water through a sand filtration pretreatment unit, and directly interfering the nucleation and crystallization processes of inorganic scaling on a membrane surface by utilizing naturally enriched microbial communities and extracellular polymeric substances thereof in a sand filtration process without adding a fungicide or a chemical scale inhibitor, so as to form a loose and reversible pollution layer structure. The method effectively reduces the scaling rate of inorganic salts such as calcium carbonate and the like, inhibits membrane surface biological pollution, delays compaction of a pollution layer, improves the membrane flux retention rate, prolongs the membrane operation cycle and reduces the cleaning frequency. Compared with an existing traditional physical or chemical pretreatment method, the natural scale inhibition effect of an ecological system in the sand filtration unit is fully utilized, and the method has the remarkable advantages of being low in operation cost, environmentally friendly, high in adaptability and the like.

The present invention is applicable to the technical field of wastewater treatment, and provides an industrial wastewater purification treatment device. The device comprises a treatment tank; a first rotating shaft is rotatably mounted on the treatment tank and a stirring rod is arranged at a bottom end of the first rotating shaft; sieve holes are formed in the middle portion of a movable plate on the inner side of the treatment tank; a lifting mechanism is mounted on the treatment tank, and the bottom end of the lifting mechanism is also connected to the movable plate; an elastic blocking mechanism is mounted at the bottom end of the treatment tank, and the top end of the elastic blocking mechanism abuts against the bottom of the movable plate and moves synchronously along with the movable plate; a squeezing water drainage mechanism is transmittingly connected to the lifting mechanism by means of a second gear set; and a circulating system is mounted outside the squeezing water drainage mechanism and in communication with the treatment tank. The present application can separate wastewater from waste residues, and then further separate wastewater in the waste residues, thereby effectively avoiding pollution caused by wastewater; effective substances in the wastewater and waste residues are rationally utilized; unidirectional filtration of wastewater during mixing is realized, thereby improving the purification capacity; and the interior of the treatment tank is kept in a dry state.

The invention relates to the technical field of industrial wastewater treatment, and discloses a treatment method for grinding fluid wastewater of a grinder, which comprises the following steps: pretreatment and demulsification, multi-stage chemical purification, biochemical deep treatment, deep purification and recycling, and sludge treatment. A specific supported heterogeneous catalyst is adopted in the multi-stage chemical purification step, nano zero-valent iron and copper oxide composite active components constructed on the surface of the catalyst can enhance the generation efficiency and stability of free radicals in the advanced oxidation process, and a composite coagulant with an optimized ratio in the coagulating sedimentation step is cooperated, so that the purification efficiency of the high-grade oxidation process is improved. An efficient continuous removal system for heavy metal ions and refractory organic pollutants is formed; meanwhile, in the pretreatment step, the demulsifier is composed of specific components, through the synergistic effect of all the components, rapid demulsification of the emulsified oil phase in the grinding fluid wastewater is achieved, favorable conditions are created for subsequent deep treatment, and therefore the purification efficiency and operation stability of the technology are overall improved.

The invention provides an industrial wastewater treatment device and treatment method, and relates to the technical field of wastewater treatment. The industrial wastewater treatment device comprises a fluidized bed device, the fluidized bed device is at least provided with a reactor, the reactor is provided with a raw water inlet, a chemical feeding port, a magnetic seed and crystal seed feeding port, a particle discharging port and a water outlet, the raw water inlet is used for feeding wastewater to be treated into the reactor, the chemical feeding port is used for feeding chemicals into the reactor, and magnetic seeds and crystal seeds are fed into the magnetic seed and crystal seed feeding port; the particle discharge port is used for discharging crystal particles, the water outlet is used for discharging fluidized bed effluent, and the fluidized bed effluent is effluent obtained after the to-be-treated wastewater reacts with the chemicals, the magnetic seeds and the crystal seeds. By applying the scheme provided by the invention, the wastewater treatment efficiency can be effectively improved, and the flexibility and effect of wastewater treatment can be remarkably enhanced by adding the magnetic seeds and the crystal seeds, so that the treated water quality is more stable.

The invention provides alkaline laccase WCotA and application thereof, and belongs to the technical field of biological engineering. According to the invention, assumed protein codons from bacillus amyloliquefaciens are optimized by a bioengineering technology, then are heterologously expressed on a carrier, and are transferred into escherichia coli with clear genetic background and fast growth cycle for amplification and expression to obtain a protein product; the amino acid sequence of the protein product is as shown in SEQ ID NO.1, and the nucleotide sequence for coding the protein product is as shown in SEQ ID NO.2; according to the present invention, the characterization results show that the protein product has high laccase activity, and is marked as alkaline laccase WCotA; the alkaline laccase WCotA has the outstanding advantages of alkali resistance, high temperature resistance, wide pH action range and the like, and has good application in the fields of textile industry, food processing, pulping processing, industrial wastewater treatment and the like.

A sorbent device based on a porous membrane bag (e.g., porous propylene membrane bag) encapsulated alkaline-modified zeolite (e.g., alkaline-treated USY zeolite). A process for removing heavy metals, such as Cd(II), Cr(III), and Pb(II) from an aqueous solution or an industrial wastewater samples with the sorbent device is provided. A method for preparing the alkaline-modified zeolite is also described.

The invention relates to the technical field of sewage treatment, and discloses a controllable release composite carbon source-microbial agent microsphere and a preparation method and application thereof.The microsphere is composed of a composite carbon source, a microbial agent, a slow release matrix, a cross-linking agent, a reinforcing agent and an adversity-resistant auxiliary agent and is of a multi-stage pore structure; the precise gradient release of the carbon source and the efficient long-term attachment of the fungicide can be realized. By preferably selecting a low-temperature-resistant / high-salt denitrifying strain and cooperating with an adversity-resistant auxiliary agent, the microspheres show excellent denitrification performance in a low-temperature (5-15 DEG C) or high-salt (salinity of 1%-5%) environment, and the denitrification efficiency is improved by 20%-50% compared with that of a conventional technology. The microsphere is particularly prominent in denitrification application in sewage treatment, can efficiently treat industrial wastewater, urban sewage, marine pollution and other problems, is efficient and simple in preparation process, and has remarkable industrialization value and environmental benefits.

The invention is applicable to the technical field of industrial wastewater treatment, and provides a construction method of a microalgae-in-situ bacteria strengthening system for degrading naphthenic acid, which comprises the following steps: separating and identifying two strains of in-situ bacteria from a discharge port of an oil-producing wastewater treatment plant, and constructing a three-strain typical stain-resistant green alga-in-situ bacteria co-culture system. The strengthening system can highly tolerate and efficiently degrade naphthenic acid, can effectively remove nitrogen and phosphorus, and has higher biomass and high-value compound yield. The microalgae-in-situ bacterium strengthening system can reduce pollutant discharge and improve the microalgae resource utilization rate, and the microalgae-in-situ bacterium strengthening system can be used as a biological strengthening degradation technology of naphthenic acid and can be suitable for purification treatment of oil production wastewater and petroleum polluted water areas.

The invention discloses a modified hollow cadmium sulfide photocatalytic reducing agent and a preparation method and application thereof, and belongs to the technical field of wastewater treatment.The preparation method comprises the steps that silicon dioxide microspheres and deionized water are mixed to prepare suspension liquid, a sodium citrate aqueous solution, a cadmium chloride aqueous solution, ammonia water and a thiourea aqueous solution are added into the suspension liquid, the mixture is stirred to be uniform and then heated for a reaction, and the modified hollow cadmium sulfide photocatalytic reducing agent is obtained; preparing to obtain a silicon dioxide and cadmium sulfide composite material; immersing the silicon dioxide and cadmium sulfide composite material into a sodium hydroxide solution, heating and etching to obtain nano hollow cadmium sulfide; the preparation method comprises the following steps: immersing nano hollow cadmium sulfide into a 1-octadecene solution, carrying out heating reaction, and carrying out alcohol washing and drying to obtain the modified hollow cadmium sulfide photocatalytic reducing agent. The modified hollow cadmium sulfide composite photocatalyst is synthesized through a silicon dioxide template method and a thermal decomposition method, and high-concentration methyl orange industrial wastewater can be efficiently degraded under the condition of visible light irradiation.

The invention relates to a Fenton-like system for regulating and controlling a Co-N microenvironment based on sulfur (S) and application of the Fenton-like system in efficient degradation of antibiotics. Cobalt sulfate (CoSO4) and cobalt nitrate (Co (NO3) 2) are used as raw materials, and the S-doped Co-N-based catalyst is prepared through high-temperature calcination (100-1200 DEG C). According to the catalyst, the Co-N microenvironment is regulated and controlled through S, the electronic structure and surface active site distribution of the catalyst are optimized, and the synergistic effect of double active sites (Co and N) is achieved. In the Fenton-like reaction, the catalyst can efficiently activate peroxymonosulfate (PMS) to generate various high-activity species (such as < 1 > O2 and high-valence metal), and the degradation efficiency of pollutants is remarkably improved. The catalyst shows excellent degradation performance on tetracycline in a wide pH range (pH 5-9), and the degradation efficiency is remarkably higher than that of a traditional Fenton system. In addition, the catalyst has good stability and reusability, and can still maintain high catalytic activity after being recycled. The S-regulated Co-N microenvironment catalyst and the Fenton-like system thereof provided by the invention have the advantages of simple preparation, mild reaction conditions, high degradation efficiency and the like, can be widely applied to the fields of sewage treatment, industrial wastewater treatment and the like, and provide a new solution for efficient treatment of antibiotic pollution in a water body.