238results about How to "Realize purification" patented technology

The invention discloses a nano catalytic electrolysis flocculation device, relating to an electrolysis flocculation device. The nano catalytic electrolysis flocculation device has the advantages of extremely low working voltage between two adjacent electrodes, large current density, small energy consumption, high electrical efficiency and no electrode consumption and electrolysis, and integrates solid-liquid separation function and gas-liquid separation function. The bottom of a shell is provided with a water inlet; the shell is internally provided with a scum baffle and a watertight shutter; the scum baffle and one inner side of the shell form a water discharging chamber; a gap is reserved between the bottom of the scum baffle and the bottom of the shell; the scum baffle and the other inner side of the shell form a slag discharging chamber; a gap is reserved between the top of the watertight shutter and the top of the shell; a hydrogen exhaust port is arranged on the top of the shell; an electrolyzer is arranged between the scum baffle and the watertight shutter; the top of the electrolyzer is open and the gap is reserved between the top of the electrolyzer and the top of the shell; electrodes are installed in the electrolyzer; a gas-liquid separation chamber is formed in the shell on the upper part of the electrolyzer; and a drain outlet is arranged at the bottom of the shell and us positioned between the watertight shutter and the adjacent electrolyzer.

The invention discloses an initial rainwater and mixed rain-sewage overflow water impounding sewage facility comprising a rainwater guide canal and a regulation reservoir arranged beside the rainwater guide canal. The rainwater guide canal is provided with a sinking intercepting channel which is provided with a side guide port communicated with the regulation reservoir. A grille area, a wetland filter plant area and a seepage filter area are arranged in the regulation reservoir sequentially along the water flow direction. Initial rainwater and mixed rain-sewage overflow water are low in flow; when guided via the rainwater guide canal, the initial rainwater and the mixed rain-sewage overflow water fall and flow into the intercepting channel at first and then flow into the regulation reservoir for purification, through the side guide port of the intercepting channel; with the passage of time, water level of the regulation reservoir rises, the intercepting channel is supported up to raise the water level thereof, and accordingly when flowing by the intercepting channel, late rainwater directly overflows from the intercepting channel and flows into downstream water through the lower segment of the rainwater guide canal; therefore, the initial rainwater and mixed rain-sewage overflow water which are severely contaminated, and the late rainwater, which is clean, are discharged separately.

The invention discloses an oil-water separation device and a preparation method thereof, and belongs to the technical field of chemical process devices. The preparation method comprises the following steps of: alternately putting a foam metal mesh substrate into ethanol and acetone, ultrasonically cleaning, and drying; preparing the required hydrofluoric acid / silver nitrate corrosive liquid; closely combining the foam metal mesh and a silicon chip, immersing in the heated hydrofluoric acid / silver nitrate corrosive liquid, corroding for 5 to 20 minutes, taking out, washing with distilled water, and drying; and soaking the dried device in ethanol solution of a low-surface-energy substance, taking out, washing with distilled water and drying. The device with multiple functions of adsorbing overflowed oil, an oil skimmer and separating oil and water consists of the metal mesh substrate and nano metal silver particles deposited on the surface of the metal mesh substrate, and has the surface modified by the low-surface-energy substance. The device has superhydrophobic / super-oleophilic effect, can be self-cleaned, can bear high temperature of at least 120DEG C, and can collect leaked oil at high temperature. The preparation method is simple, the flow time is short, and the efficiency is high.

The invention provides a comprehensive treatment method for acid mine water of small abandoned coal mines. A slurry is injected into a grouting filling layer, a plugging surface layer is formed afterthe slurry is solidified, the underground water supplementary amount of atmospheric precipitation to underground mined-out areas of the abandoned mines in a target area is reduced, and a permeable reactive barrier, a continuous alkali production pool and a constructed wetland section are continuously arranged at mine wellheads of the small abandoned coal mines with relatively good maintenance conditions; a drainage canal collection system is built around surface rivers in the target area; coal gangue piles in the target area are subjected to closed treatment. The integrated technical scheme realizes comprehensive treatment of the acid mine water in a number of small abandoned coal mines distributed in the target area, and has the advantages of high practicability, low cost and good effect.

The invention provides a hydrogen preparation method and belongs to the field of preparation of hydrogen. The method comprises the following steps: (1) carrying out anaerobic fermentation on biological wastes to produce biogas; (2), purifying the biogas, pressurizing to 3-4 MPa and carrying out hydrocarbon conversion reaction to obtain a mixed gas containing CO, CO2, H2 and steam; and (3), carrying out CO conversion reaction on the mixed gas under the conditions of 2.2-2.6 MPa and 300-350 DEG C in the presence of an iron-cobalt catalyst, cooling the temperature of the reacted mixed gas to 35-45 DEG C and carrying out pressure swing adsorption to obtain hydrogen. The hydrogen preparation method has the technical effects of low cost and energy resource conservation; the current situation that the preparation of hydrogen in the prior art is too dependent on petroleum and natural gas is improved; the hydrogen preparation method provides a novel preparation method of industrial hydrogen; while the hydrogen preparation is ensured, the development of the biogas industry is also greatly promoted.

Belonging to the technical field of water treatment in water pollution control, the invention specifically relates to a method for treatment of anionic pollutant containing wastewater with modified tobacco straw. The method includes: employing organic-inorganic cationic monomer graft copolymerization to perform straw fiber modification, firstly pretreating tobacco straw with a sodium hydroxide solution to separate straw cellulose, then under an N2 protection environment, using ceric ammonium nitrate as the initiator, subjecting the pretreated tobacco straw and dimethyl diallyl ammonium chloride, aluminum sulfate to graft copolymerization reaction so as to prepare a novel straw modified material, then using the modified material to remove organic anionic pollutants and inorganic anionic pollutants from water respectively, thus finally realizing treatment of anionic pollutants in wastewater.

The invention discloses a preparing method of organic nutrient soil. The method comprises the steps that life or agriculture waste water is filtered through a filter screen and enters a device which is provided with four layers of adsorbents, the waste water is subjected to cycle treatment until the waste water meets the agricultural irrigation water standard, and the adsorbents are taken out for standby application; then the adsorbents which adsorb and contain a large amount of organic pollutants are matched with minor ingredients to conduct fermentation and prepare solid nutrient materials, and the solid nutrient materials are mixed with the soil to obtain the organic nutrient soil. According to the preparing method, the organic nutrient soil easily absorbs nutrition and is good in fertility and applied to agricultural production, and the production efficiency is improved; not only is purification treatment on polluting waste achieved, but also green circulation economy of resource development and utilization on the polluting waste is formed.

The invention provides a method for purifying waste water and recovering waste materials on line in electroplating and chemical plating processes. The method comprises the following steps of: directly arranging a capacitance deionizer in a water washing device on a production line to adsorb various negative ions and positive ions in waste water during charging a battery so as to purify the waste water; and then releasing and recovering waste materials through electrode discharge so as to realize zero release of pollutants. The invention ensures that the capacitance deionization method is suitable for the manufacturing processes of various electroplating or chemical plating products through the optimization of process parameters. Through on-line purification and recycle of washing water, the burden of the traditional waste water treatment system is obviously reduced, meanwhile, the quality of plating pieces is guaranteed because the water quality of the washing water is obviously improved, and the classified recovery of waste materials can be achieved. The method can also obviously reduce the COD in the waste water and has wide application prospect in the fields of electroplating and chemical plating.

The invention provides an oily sludge treatment process and a treatment system. The treatment process comprises the following steps: transporting oily sludge into the field and storing; preparing clean water and heating the clean water to hot water at above 70 DEG C; adding hot water into the stored oily sludge for diluting, screening and then cleaning and crushing the diluted oily sludge; cleaning mud, dosing the crushed materials and then stirring and performing solid sludge separation, thereby acquiring primary slurry and primary dirty oil; performing filter pressing treatment on the primary slurry, thereby acquiring a solid-phase material and a liquid-phase material; adding water into the primary dirty oil and performing primary oil water separation, thereby acquiring primary sewage and primary dirty oil; returning the primary sewage to the slurry cleaning process for use and storing the primary dirty oil; cleaning and purifying the solid-phase material, thereby acquiring a purified material, adding accessories and preparing into a brick and storing; and returning the liquid-phase material to the step of primary oil water separation and treating. The oily sludge treatment process provided by the invention adopts the idea of innocent treatment and zero emission, is capable of realizing the innocent treatment for the oily sludge and is capable of effectively preventing the damage and pollution to the environment.

The invention provides a novel nanometer catalytic electrolysis device comprising a shell, wherein the interior of the shell is divided into a left chamber and a right chamber through an upper separating board, a lower separating board and a sealing board, wherein the left chamber is an electrolysis chamber, and the right chamber is an air floatation precipitating chamber; a water inlet is arranged on the upper edge part of the shell of the electrolysis chamber; the water inlet is connected with a wastewater inlet pipeline through a pipeline; a drain outlet is arranged at the bottom of the electrolysis chamber; the drain outlet is connected with a drain pipe; an electrolysis groove is arranged on the electrolysis chamber; the four sides of the electrolysis groove are sealed by using engineering plastic, and the upper end and the lower end of the electrolysis groove are opened; the water inlet of the electrolysis groove is arranged at the lower end of the electrolysis groove, and the water outlet of the electrolysis groove is arranged at the upper end of the electrolysis groove; the electrolysis groove is fixed on the sealing board; an electrode is mounted in the electrolysis groove; an air floatation layer is arranged between the electrode and the sealing board; the other components are connected in a sealed manner; and a water channel is formed by gaps among electrode pads atintervals. By using the novel nanometer catalytic electrolysis device provided by the invention, water treatment cost is saved, and material consumption is greatly reduced, so as to reduce secondary pollution; the sewage emission is greatly reduced, and the cost of solid waste disposal is reduced; and the biodegradability of wastewater is further improved so as to provide the better conditions for a follow-up treatment process.

The invention relates to a pitch fume purification catalyst and a preparation method thereof. The catalyst is characterized in that the catalyst employs precious metal of Pt and Pd as active components which is coated at cordierite honeycomb ceramics after a modified alumina layer is coated at the cordierite honeycomb ceramics. Preparation steps are that: cordierite honeycomb ceramics are soaked in modified slurry which is added with surface active agent, after drying and roasting for 2 to 5 hours, the obtained ceramic support which is coated with a modified alumina layer is soaked in a mixture of Pt and Pd, and the catalyst is obtained after being dried and roasted. The catalyst prepared by the invention is characterized in that: production cost is comparatively low, precious metal is mainly distributed at outer layers, thus utilization ratio is comparatively high, active surface area is large, and the catalyst can work stably at high temperature. The preparation method of the invention is characterized in that: the preparation method is easy, repetitiveness is good, purification treatment of industrial pitch fume and other organic exhaust can be realized after a cushion coat is added and a shell is made into a fume purifier; the catalyst has wide application prospect in oil or gas boilers, industrial kilns and civilian kitchen.

The invention discloses automatic paint spraying equipment for a mobile phone shell, and relates to the technical field of paint spraying machining of the mobile phone shell. The automatic paint spraying equipment comprises a paint spraying shell, wherein the lower surface of the inner wall of the paint spraying shell is fixedly connected with two first fixed rods; the opposite faces of the two first fixed rods are separately and fixedly connected with the left side face and the right side face of a motor machine body; an output shaft of the motor is fixedly connected with a U-shaped plate; the left side face and the right side face of the U-shaped plate are connected with threaded devices in a clamping manner; and the left end and the right end of each of the threaded devices are separately and fixedly connected with the right side face of each of movable rods and the left side face of each of extrusion plates. According to the automatic paint spraying equipment for the mobile phone shell disclosed by the invention, through cooperation of an air blower, a connection pipe, a first filter screen, a second filter screen, an air suction pipe, an air suction hood and third through holes, purification treatment on toxic gas is realized, the condition that the toxic gas is breathed into a human body by a working personnel is avoided, the health of the working personnel is ensured, and the air-drying speed of the mobile phone shell is quickened.

The invention discloses a medical waste treatment method with an afterheat recovery heat accumulator. The problem that the environment is polluted because of improper daily medical waste treatment is solved. The method comprises the following steps of: firstly classifying the medical wastes into combustible medical wastes and incombustible medical wastes; pulverizing, drying and burning the combustible medical wastes; performing tail gas purification treatment; pulverizing and sterilizing the incombustible medical wastes; and finally, turning the burned furnace slag and the sterilized medical wastes into harmless trashes. Steam generated by the boiler in the burning process is delivered to a steam heat accumulator; high-temperature steam released by the steam heat accumulator is input to the sterilization step of sterilizing the incombustible medical wastes, and also can be input to a medical heat supply system or sterilizing equipment for heating or sterilizing; the combustible medical wastes are subjected to harm-free treatment and reduction treatment by burning; and the tail gas generated after burning is purified, so that secondary pollution of the medical wastes is avoided.

The invention discloses a production method of a low-sulfur marine fuel oil. The production method comprises the following steps: mixing catalytic slurry oil with a first additive, carrying out settling separation after the mixing treatment, obtaining a first material and residues after the separation; introducing the first material into a hydro-processing unit, carrying out a hydrogenation reaction under the action of a hydro-processing catalyst and hydrogen, introducing a liquid-phase effluent obtained after the reaction into a clarification unit, subjecting clarified oil to solid-liquid separation to obtain purified oil slurry, and mixing the purified oil slurry with an inferior raw material (hydrogenation tail oil) to obtain the low-sulfur marine fuel oil. According to the method, thesolid content and the sulfur content of the catalytic slurry oil can be reduced, high-quality purified slurry oil is produced, and the high-quality purified slurry oil is blended with residual oil toproduce the insufficient low-sulfur marine fuel oil.

The invention discloses a waste gas purification device for atmospheric pollution treatment and belongs to the field of waste gas purification treatment equipment. The device comprises a baseplate, adust suction mechanism, a waste gas purification mechanism and a tail gas treatment mechanism. The tail gas treatment mechanism comprises a purification box, a waste gas suction assembly and a waste gas purification assembly, the dust suction mechanism comprises a lifting plate, an angle adjustment assembly and a lifting assembly, two symmetrically-arranged dust suction assemblies are arranged onthe side wall of the lifting plate, and four rectangularly-distributed driving wheels are arranged at the bottom of the baseplate. According to the waste gas purification device, dust in windward airflow at different positions can be sucked through the dust suction mechanism so that dust particles in the windward airflow can be sucked, through the purification assembly, harmful gas in waste gas can be purified, and through the tail gas treatment mechanism, the tail gas can be effectively purified, and dioxin, mercury and the like in the tail gas can be removed through operation.

The invention discloses a water body circulating purification biological filter bed for high-water-level prawn culture. The water body circulating purification biological filter bed comprises a filter bed which is arranged at top of water body of a culturing pond and a water pumping pipeline which is arranged in the water body of the culturing pond. The top end of the water pumping pipeline penetrates the filter bed and is connected with a water distributing pipeline. The water distributing pipeline is arranged above the filter bed in a longitudinally and horizontally staggered manner. The bottom end of the water pumping pipeline is internally provided with an oxygenating aeration pipe. The oxygenating aeration pipe is connected with an aeration oxygenating device through an air pipe. Through the water pumping pipeline and the oxygenating aeration pipe, water body circulation of the culturing pond is realized in an air floatation water pumping manner. The water body which contains a deposit is pumped to the upper filter bed through the water pumping pipeline; and through filtering purification of the filter net, the water body flows back into the culturing pond, thereby realizing purification of the water body. Furthermore, sufficient mixing between upper-layer water body and lower-layer water body in the culturing pond can be realized, and furthermore the filter bed at the top of the water body of the culturing pond can perform a sunshielding function, thereby supplying a good inhabiting environment for the prawns and realizing benefits for growth.

The invention discloses a comprehensive treatment system for aquaculture tail water. The system comprises an aquaculture tail water sedimentation tank, an aeration tank, an ecological purification tank, a first filter dam and a second filter dam, wherein the aquaculture tail water sedimentation tank, the aeration tank and the ecological purification tank are sequentially arranged; the first filter dam is arranged between the aquaculture tail water sedimentation tank and the aeration tank; a second filter dam is arranged between the aeration tank and the ecological purification tank; and an aeration device is arranged in the aeration tank. The comprehensive treatment system and method for the aquaculture tail water have the technical effects that the comprehensive treatment system and method are suitable for comprehensive treatment of aquaculture tail water from centralized and continuous ponds and comprehensive treatment of industrial aquaculture tail water, and adopt the technical means of precipitation, filtration, aeration, biological purification and the like to effectively realize the comprehensive treatment of the aquaculture culture tail water of the ponds and purification treatment of the industrial aquaculture tail water, and obtained purified water can be pumped into the culture ponds again for repeated use or discharged into a natural water area.

The invention provides an infusion bag automatic turnover and sorting system comprising a first conveying line, a second conveying line, an on-line reinspection scale, a third conveying line, a flattening device, a rejecting device, a first collecting hopper, a visual device, an industrial light source, a robot, a rack, a clamp, a suction disc, a coder, a fourth conveying line, a fifth conveying line and a second collecting hopper. Through the visual device in the technical scheme, intelligent sorting of infusion bags is achieved, sorting mistakes in infusion bag sorting work are reduced, the workload of manual sorting is also reduced, and the working efficiency is improved; weighing reinspection of the infusion bags is achieved through the arranged on-line reinspection scale; the suction disc is controlled through a vacuum generator; and waste gas generated by the vacuum generator is exhausted to outdoor space through an air storage device and a gas exhaust pipe, so that purifying treatment of gas exhausting is achieved.

The invention discloses a water wheel type reinforcing treatment device used for improving water quality. The device comprises a vertical wheel frame (1), a center rotating shaft (2) and impellers (3). The rotating shaft (2) is installed in the center of the vertical wheel frame (1). The impellers (3) are installed on the vertical wheel frame (1) through the center rotating shaft (2) in the radial direction. The device further comprises a water-drawing water filter (4) and a water treatment collector (5). The water-drawing water filter (4) is installed on the impellers (3). The water treatment collector (5) is fixed to a support of the center rotating shaft (2). In the rotating process, water is lifted to the water-drawing water filter from the low place to be filtered primarily, then the water is filtered secondarily through a nano-filtration water tank to be purified, finally the water is drained into a lake after oxygen enrichment is carried out, the process of water lifting, purifying and draining is achieved, the process is carried out circularly, and therefore the water quality is improved. Energy consumption of the device is low, manual operation is not needed, the treatment effect is good, the device can operate continuously and has high landscape value, and a new way and device is provided for restoring the water quality of the water.

The invention relates to a novel self-stirring sewage treatment purification tank which comprises four cells arranged in a matts shape, an air pump, an air-blowing pipe and an aeration pipe. The novel self-stirring sewage treatment purification tank is characterized in that the upper portion of a first cell is provided with a buffer tank, a water inlet tank and an oil isolation tank. An oil separating plate is arranged in the buffer tank. A U-shaped pipe is arranged between the first cell and the second cell, the air-blowing pipe extends into the first cell so as to stir substrates in the first cell and the second cell; the aeration pipe extends into the third cell, so as to perform aerobic reaction of the third cell; and mud discharging pipes are disposed in the third cell and the fourth cell. The sewage treatment purification tank is integrally of a matts-shaped layout, the occupied space is small, the novel self-stirring sewage treatment purification tank can be connected to a sewage treatment pipe network, the oil separating plate can hold back oil stains, automatic stirring of the substrates can be achieved, the mud discharging pipes can discharge sludge in the purification tank in a steam stripping mode, sewage undergoes the anaerobic-anoxic-aerobic-precipitating process, and the purification treatment of the sewage is performed.

The invention belongs to the field of buildings, and particularly relates to a building coating spraying device having the purification function. Aiming at the phenomenon that the coating is easy to agglomerate in an existing building coating spraying device and the surrounding environment cannot be purified, the invention provides the following technical scheme: the device comprises a base. A stirring mechanism and a purification mechanism are fixed at the upper end of the base. The purification mechanism is positioned on the rear side of the stirring mechanism, and the lower end of the stirring mechanism is communicated with one end of a discharging pipe. The other end of the discharging pipe is fixedly connected with the base through a supporting frame. A side plate is fixed at one endof the base. A pushing handle is arranged on the side plate. According to the invention, the coating can be prevented from being subjected to agglomeration through the high-efficiency stirring process. Meanwhile, the surrounding air can be purified. The device is convenient in movement, and simple and convenient in operation.

The invention provides an air purification energy-saving street lamp and a control method thereof. The control method of the air purification energy-saving street lamp comprises the following steps that a solar power supply device is provided, the angle of a solar panel in the solar power supply device at different times is controlled, and a storage battery in the solar power supply device is usedfor completing the storage of electric energy; a main structure of the street lamp is provided to monitor the surrounding luminance, the vehicle flow and the human flow, when the monitored luminanceis less than or equal to preset luminance, a light source is turned on, when the vehicle flow is greater than or equal to the predetermined vehicle flow, and when the human flow is greater than or equal to the human predetermined flow, the luminance of the light source is lightened; and a purification device is provided, PM 2.5 is absorbed through a filter layer in the purification device, the concentration of PM 2.5 in the air before and after purification is compared, the actual purification rate is calculated, and when the actual purification rate is less than the predetermined purificationrate, the filter layer is replaced. According to the control method of the air purification energy-saving street lamp, the integration of the lighting function, the purification function and the energy-saving function is realized.

The invention discloses a circuit board welding device, and particularly relates to the technical field of welding equipment. The circuit board welding device comprises a bottom plate and supporting frames, wherein the two sides and one end of the top end of the bottom plate are fixedly connected with the supporting frames correspondingly, a preheating mechanism is arranged at the top end of one side of each supporting frame, and a workbench is arranged at the top end of the bottom plate. According to the circuit board welding device, by arranging an exhaust pipe, an exhaust fan, a supporting plate, a gas outlet, a purifying box, an activated carbon particle plate, a photocatalyst plate, a cross-shaped clamping block and a cross-shaped clamping groove, harmful gas can be generated when a welding head is used for welding a circuit board, the exhaust fan is started, and the exhaust fan sucks the gas into the inner bottom end of the purifying box through the exhaust pipe; and because the activated carbon particle plate and the photocatalyst plate are arranged in the purifiying box, when gas gets away from the purifiying box through the gas outlet, the activated carbon particle plate and the photocatalyst plate can purify the gas purified to prevent the gas from pulluting the environment and further prevent the gas from causing harm to the bodies of workers.

The invention discloses a carbonic gas purification treatment device for industrial production. The carbonic gas purification treatment device comprises a treatment cabinet, a carbon monoxide reactionchamber, a weighing device, an oxygen collection bottle and an observation window. A gas inlet is communicated with the upper side of the treatment cabinet through a gas delivery inlet. The carbon monoxide reaction chamber is formed in the upper end of the treatment cabinet. The lower side of the weighing device is fixed to the left upper side and the right lower side of the treatment cabinet through support shafts. The upper side of a carbon dioxide reaction chamber is connected with the carbon monoxide reaction chamber through a separation plate. The oxygen collection bottle is fixed to theleft end of the carbon dioxide reaction chamber. The observation window is hinged to the rear outer side of the treatment cabinet. The carbonic gas purification treatment device for industrial production has the advantages that carbonic gases in waste gases can be treated; by the device, carbon monoxide is turned into carbon dioxide through reaction between ferric oxide and the carbon monoxide, and the carbon dioxide is turned into oxygen through reaction between sodium dioxide and the carbon dioxide, so that purification of harmful gases is achieved.

The invention discloses a B-mode ultrasound probe cleaning and disinfecting device for an ultrasound medicine department. The B-mode ultrasound probe cleaning and disinfecting device for the ultrasound medicine department comprises a cleaning box body; a circular through hole is formed in the upper end face of the cleaning box body; a first transverse sliding rail and a second transverse sliding rail are respectively formed on two sides of the circular through hole of the cleaning box body; the first transverse sliding rail is connected with a first clamping block in a sliding mode; the secondtransverse sliding rail is connected with a second clamping block in a sliding mode; a protective net is fixedly arranged below the circular through hole and arranged in an inner cavity of the cleaning box body; a to-be-cleaned B-mode ultrasound probe is inserted into the circular through hole and is clamped through the first clamping block and the second clamping block; a cleaning agent pipelineis arranged on the top wall of the inner cavity of the cleaning box body; a cleaning agent spray head is arranged below the cleaning agent pipeline and right faces the B-mode ultrasound probe; and the cleaning agent pipeline communicates with a cleaning agent storage box arranged on the top portion of the cleaning box body. The B-mode ultrasound probe cleaning and disinfecting device for the ultrasound medicine department is novel in structural design and convenient to use, cleaning, disinfecting and drying of the B-mode ultrasound probe can be achieved, disinfecting and recycling of a waterbody can be achieved, and the cleaning cost is reduced.

The invention relates to a rare earth element-doped layered composite metal hydroxide and a preparation and an application thereof. While preparing, a solution containing Cu<2+>, Ni<2+>, Fe<3> and La<3> and a mixed solution of sodium carbonate and sodium hydroxide are subjected to a coprecipitation reaction, and subjected to steps of aging, filtration, drying and the like to obtain the rare earthelement-doped material based on layered composite metal hydroxide. The material is reacted with low-dose hydrogen peroxide to release a single-line oxygen, hydroxyl, superoxide radical and other reactive oxygen radicals, and florfenicol, phenol, ibuprofen and other organic pollutants in the water are oxidized to achieve efficient degradation of pollutants in water. Compared with the prior art, themethod synthesizes the novel lanthanum-doped copper-based layered composite metal hydroxide, which can effectively remove organic pollutants in the water in a wide pH range, avoids the disadvantagesof narrow pH range and generation of iron filings in the traditional Fenton reaction, and has the advantages of convenient preparation, low dosage, and high utilization efficiency and the like.

The invention discloses nutrient soil used for planting of ornamental tree seedlings. The nutrient soil is prepared by the following steps of S1, pretreatment S2, composting fermentation, S3, decomposing; S4, detection and S5, granulation, wherein, in the step S1, municipal domestic sludge is crushed, and the crushed municipal domestic sludge passes through a 300-500 mesh screen to remove large granules in the domestic sludge; in the step S2, deodorized sludge is dewatered to a first water content ratio, active microorganisms are added into the dewatered deodorized sludge, straw and biologicalcarbon are put into the dewatered deodorized sludge, and temperature is controlled to be first temperature and fermentation is performed for second time; in the step S3, fermented sludge prepared inthe step S2 is dewatered to a second water content ratio; in the step S4, the content of phosphorus, acid and potassium and the content of organic matter in nutrient soil are detected, and the nutrient soil is adjusted by adding lots of elements including the phosphorus, the acid, the potassium and the like; and in the step S5, the adjusted nutrient soil is put into a granulator and is made into granules. The nutrient content of the prepared nutrient soil is 2-3 times more than that of common soil; the nutrient soil is green and environment-friendly; and when the nutrient soil is used for agriculture and forestry production, production efficiency can be greatly increased, and the economic income is increased.

The invention relates to a catalytic hydrogenation desorption method for an oxygenated compound in a Fischer-Tropsch synthesized water phase and an application thereof. The method comprises the following steps: taking a water phase co-produced from a Fischer-Tropsch synthetic oil production process as a raw material; under the action of a catalyst, adopting a hydrogenation reaction technique to convert an organic oxygenated compound in the water phase into a C1-C4 gas phase low-carbon alkane; and lastly, separating the C1-C4 gas phase low-carbon alkane from the water phase, thereby desorbing the organic oxygenated compound in the water phase. According to the method, the desorbing rate for the organic oxygenated compound is above 98%. The catalytic hydrogenation desorption method can be used for purifying the wastewater containing the organic oxygenated compound. The method is suitable for the purification treatment of the organic wastewater generated by chemical industry enterprises, food industry, and the like. The water treating method can be used for realizing the recycle of resources; the gas alkane generated under the action of catalytic hydrogenation can be reused in a Fischer-Tropsch synthetic process, thereby promoting the reasonability of the whole Fischer-Tropsch synthetic process; and the water after being treated also can be recycled.

The invention discloses a double-film photocatalytic reactor for wastewater treatment. The double-film photocatalytic reactor for the wastewater treatment comprises a feed liquid tank (1), a first group of a film or a film component (2), a second group of a film or a film component (8), a first vacuum pressure gauge (3) and a second vacuum pressure gauge (11), a first pump (4) and a second pump (12), a photocatalyst (5), a light source (7), a quartz sleeve (6), a reaction tank (9), a stirrer (10), and a penetrating fluid tank (13). The reactor comprises two films or film components, the firstgroup of the film or the film component is placed in the feed liquid tank, and the second group of the film or the film component is placed in the reaction tank. The first group of the film or the film component is used for intercepting suspended particles and insoluble solid in water solution, and eliminating the influence of the suspended particles and insoluble solid to the photocatalytic activity of a catalyst. The second group of the film or the film component is used for separating the photocatalyst and treating fluid. The double-film photocatalytic reactor is suitable for practical complicated photocatalysis treatment of the wastewater.

The invention relates to a biofilter and discloses an upward-flowing fluidization biofilter coupled with a negative pressure membrane, for solving the technical problems of an existing biofilter, such as poor filtering effect on suspended particles, planktons, benthonic animals and microorganism residues in water bodies, as well as high turbidity of treated water. The upward-flowing fluidization biofilter comprises a water inlet, a water distribution layer, a supporting layer, a filling layer, an anti-interference cantboard, an air floatation releaser and a negative pressure membrane assembly. According to a water treatment process, inlet water passes through the upward-flowing biofilter, is filtered by the negative pressure membrane in an upper clear water area and is naturally siphoned by using a siphon tube to discharge water, and thus a water treatment process is finished. The method can be used for effectively removing organic pollutants, natural organic matters, ammonia nitrogen and other pollutants out of water, the loss of biological matters is reduced, a wear damage effect of particles, such as filler, on membranes is avoided, and the plugging effect of biological metabolites and biological cells on the membranes is also avoided.