60results about How to "Pollution control" patented technology

The invention relates to a construction method of an anti-typhoon sea wave sea-crossing steel trestle and platform adjacent to a residential building. The construction method comprises the steps that firstly, deep fusion application of BIM and VR is conducted; step 2, surveying and setting out; step 3, embedding steel bars and pouring strip-shaped concrete; fourthly, the steel pipe piles are transported and lengthened; fifthly, steel pipe piles are driven; sixthly, parallel connection and diagonal bridging construction is conducted; seventhly, bearing beams are installed; eighthly, longitudinal beams are installed; ninthly, the distribution beams are installed; tenthly, bridge deck slabs and guardrails are installed; and 11, an intelligent monitoring and early warning system.

The invention relates to the technical field of photovoltaic crystalline silicon waste treatment, and discloses a method for preparing a lithium-rich silicon monoxide negative electrode material from photovoltaic crystalline silicon waste, and the method comprises the following steps: step 1, crushing and granulating the photovoltaic crystalline silicon waste; 2, preparing silicon monoxide particles; step 3, preparing lithium-rich silicon monoxide particles; step 4, preparing carbon-coated lithium-rich silicon monoxide particles; and 5, constructing a conductive network of the carbon-coated lithium-rich silicon monoxide particles to obtain the carbon-coated lithium-rich silicon monoxide negative electrode material with the three-dimensional conductive network. According to the scheme, high-value utilization is carried out on the photovoltaic silicon crystal waste, and the problem of subsequent treatment of solid waste is solved; the source pressure of the silicon-based negative electrode material is effectively relieved, and the preparation cost pressure of the silicon-based negative electrode material is reduced; the problems of low initial coulombic efficiency, obvious volume expansion, poor conductivity and the like of the silicon-based negative electrode material are solved by carrying out pre-lithiation, carbon coating, net coating, doping and the like on the material.

The utility model discloses a polypropylene granulation unit additive feeding powder closed recovery system, which is characterized by comprising a breathing stock bin, an anti-static filter for filtering powder in ascending air flow is arranged in the breathing stock bin, the breathing stock bin is connected with a recovery tank through a pipeline, and the recovery tank is connected with the breathing stock bin through a pipeline. The recovery tank is communicated with an inlet line of a granulator hopper, so that recovered powder and powder fed into the granulator hopper by the system are synchronously processed and granulated; the breathing stock bin and the anti-static filter in the breathing stock bin are arranged, dust and powder brought out by rising hot airflow in the balance pipe and rising airflow of the breathing stock bin are filtered and recycled, the recycled powder is concentrated in the recycling tank, pollution can be controlled, cost and consumption can be reduced, and solid waste is reduced.

The invention relates to a mainstream anaerobic ammonia oxidation quick start and efficient stable operation method, which uses an immersed anaerobic ammonia oxidation granular sludge membrane biological composite reactor comprising an upflow anaerobic sludge blanket (UASB), and an MBR is immersed in the upper part of the upflow anaerobic sludge blanket (UASB); the height-diameter ratio of the UASB is 4-6, and the overall length of the MBR is 1 / 2-1 / 3 of the height of the UASB. The granulation of the sludge is realized through the UASB, and the enrichment capacity, the sedimentation performance and the stability of the sludge are improved; in the operation process of the mainstream Anammox, the complete retention of sludge functional bacteria is realized by adopting the operation of gradually shortening the hydraulic retention time and improving the nitrogen load and through the biological complete interception effect of the immersed MBR. In the granulation process of the sludge, the settling performance of the sludge is improved, a large amount of flocculent sludge is prevented from being in direct contact with membrane filaments, the membrane pollution problem in the membrane assembly is relieved, meanwhile, water flow shearing force generated around the membrane assembly can effectively wash pollutants on the surface of the membrane assembly, and the membrane pollution problem is further controlled.

The invention relates to the field of food processing, and discloses a fresh-keeping processing method of green bamboo shoots, which comprises the following steps: S1, cleaning collected green bamboo shoots: firstly, manually cleaning impurities on the surfaces of the bamboo shoots, and then carrying out secondary cleaning by using a sodium hypochlorite solution with the concentration of 0.02-0.05%; s2, grading and classifying the cleaned green bamboo shoots according to the appearance color and the tenderness degree; s3, the bamboo shoots are properly aired, ultraviolet rays are used for disinfecting the operation environment, 75% ethyl alcohol is used for spraying treatment on the operation contact surface, and a disinfected cutter is used for removing pollution wounds of the green bamboo shoots. Through manual cleaning and secondary cleaning of the bamboo shoots with a 0.02-0.05% sodium hypochlorite solution, ultraviolet sterilization and disinfection of operation surfaces and tools with 75% ethanol are combined, microorganisms and impurities are effectively removed, the risk of wound pollution is reduced, the wound is soaked with a fresh-keeping solution and packaged with a double-layer paper bag, the fresh-keeping effect is enhanced, the moisture loss of the bamboo shoots is reduced, and the quality of the bamboo shoots is improved. And a plurality of defects of the traditional method are improved.

The utility model belongs to the technical field of roadway dust removal, and relates to an air flow purification device of a fully-mechanized face air return crossheading, which comprises a frame type component, a lifting component, a lower rotating component, an upper rotating component and a spraying component, the frame type component is used for allowing an operation vehicle to pass through, and the lifting components are arranged on the two sides of the frame type component and used for achieving lifting of an upper structure in the frame type component; a spraying component is arranged in the middle of the upper structure of the frame type component and used for treating dust in an area where a vehicle passes through. The rotating lower part is hinged with one side of the lower structure of the frame type part, and the spraying part is arranged at the upper part of the rotating lower part; the rotating upper part is hinged to the side, close to the rotating lower part, of the upper structure in the frame type part, and a dust catching net is arranged between the rotating upper part and the frame type part. Sufficient passing space is provided for vehicles, obstruction of a traditional dust catching net to traffic is avoided, different roadway heights and environment conditions can be flexibly adapted, and the stability of the treatment effect is ensured.

The utility model relates to a material recovery device which is characterized in that when a negative electrode material needs to be recovered in the actual negative electrode material processing process, a vacuum feeding machine can be operated, the negative electrode material is collected by a material suction pipeline of the vacuum feeding machine, and the negative electrode material is sucked into the vacuum feeding machine through the material suction pipeline; then the feeding port of the ton bag penetrates into the position between the feeding barrel and the clamping ring, the linear driving part is operated to drive the clamping ring to ascend through the lifting plate, the clamping ring and the fixing ring are matched with each other to clamp the feeding port of the ton bag, and then a valve in the vacuum feeding machine is operated to clamp the feeding port of the ton bag. The negative electrode material in the vacuum feeding machine enters the ton bag through the feeding port of the ton bag to be recycled, then the clamping ring is driven to descend, and the ton bag is taken out, so that the negative electrode material can be better conveyed, flying dust is reduced, material loss is avoided, the processing environment is prevented from being polluted, and the health of operators is prevented from being affected.

The invention discloses a rice-wheat rotation area liquid manure efficient returning planting method, which comprises the following steps: step 1, precisely metering and applying liquid manure subjected to innocent treatment, step 2, precisely applying the liquid manure by stages according to the fertilizer requirement rules of rice and wheat in different growth periods, and step 3, performing returning operation by combining injection type deep application and movable sprinkling irrigation equipment. 4, carrying out matched management after the liquid manure is applied; 5, carrying out a dynamic management closed loop of measurement, calculation, determination, application, monitoring and regulation; through system implementation and dynamic closed-loop management of three precise dimensions of opportunity, method and proportioning, ammonia volatilization and nitrogen and phosphorus runoff loss are greatly reduced, agricultural non-point source pollution is effectively controlled, soil organic matter is stably increased, chemical fertilizer investment can be remarkably reduced through precise replacement, the production cost is reduced, and the economic benefit is increased. Meanwhile, fertilizer utilization rate is increased, annual yield of rice and wheat is increased, and income is increased.

The invention belongs to the technical field of water treatment, and discloses a cyanobacterial bloom treatment device which comprises a treatment mechanism on a water surface tool, and the treatment mechanism is communicated with a collection mechanism floating on the water surface; the collecting mechanism comprises an algae collecting assembly, and the algae collecting assembly communicates with a transferring assembly communicating with the processing mechanism; a driving assembly is arranged on the algae collecting assembly; the treatment mechanism comprises a treatment box arranged on the water surface tool, a treatment assembly is arranged in the treatment box and communicates with the transfer assembly, and the bottom end of the treatment assembly communicates with a discharging assembly; the algae collecting assembly comprises an algae collecting cylinder floating on the water surface, and a plurality of floating air bags for adjusting the floating state are arranged on the algae collecting cylinder. The blue-green algae is treated in a physical mode, the blue-green algae in the water body can be rapidly separated and recycled, the blue-green algae pollution of the water body is effectively treated, the threat of the blue-green algae is reduced, the treatment efficiency is high, the risk caused by chemical treatment and biological treatment is avoided, meanwhile, the blue-green algae is recycled, and the resource waste is reduced.

The utility model relates to the technical field of water conservancy projects, in particular to water conservancy environment-friendly cleaning equipment which comprises a main body mechanism, a filtering mechanism fixedly installed in the main body mechanism, a collecting mechanism fixedly installed in the main body mechanism, and a motor placing mechanism fixedly installed in the main body mechanism. And the control mechanism is fixedly mounted on the main body mechanism. The multi-screening mode is adopted, the influence on the local ecological environment can be reduced, the problem of excessive damage to the natural environment is avoided, the ecological environment and biological diversity are protected, the cleaning equipment can effectively clean pollutants and sundries, including floating objects, aquatic plants, branches, algae and the like, in the water body, and therefore the water body is purified, and the water quality is improved. Further diffusion and spreading of water body pollution can be prevented, the water body pollution problem is effectively controlled, the working efficiency of water conservancy environmental protection is greatly improved, the problem that a large amount of manpower, material resources, time and other resources are needed in a traditional manual cleaning mode is solved, and the cleaning cost is reduced.

The utility model discloses a condensation water cooling unit which comprises a main body, a low-temperature pool and a mixing pool, the low-temperature pool and the mixing pool are located in the main body, a water mixer is arranged in the mixing pool, a plurality of evenly-distributed water distribution holes are formed in the lower end of the water mixer, and a normal-temperature tap water pipe and an emptying opening are arranged at the top end of the main body respectively. The device has the beneficial effects that high-temperature condensed water firstly enters the mixer, when the temperature exceeds the standard, the tap water electric valve is opened, and tap water enters and is mixed with the high-temperature condensed water, so that rapid cooling, rapid cooling and rapid pollution discharge are realized, and the efficiency is greatly improved; the condensed water circulating pump pumps water from the low-temperature pool to the mixer to mix and cool high-temperature condensed water, so that the tap water consumption is saved, the treatment capacity is large, and the device can be flexibly applied according to the requirements of users and can be used for a condensed water recovery system; waste of water resources is avoided, and the method has an obvious effect on controlling boiler blow-off heat environment pollution.

The application discloses an AnDMBR dynamic membrane assembly for sludge anaerobic digestion, which comprises a sealed membrane frame, a plurality of flat plate membranes and a plurality of detachable aeration pipes; the sealed membrane frame is used for bearing various components of the AnDMBR dynamic membrane assembly and is in the shape of a cuboid composed of a stainless steel grid; the plurality of flat plate membranes are arranged in parallel and equidistantly in the sealed membrane frame; a membrane water outlet is arranged above the flat plate membranes, and the height of the membrane water outlet is higher than the upper surface of the sealed membrane frame; the gap between the plurality of flat plate membranes is filled with conductive particles; the plurality of detachable aeration pipes utilize the circulating biogas from the air guide holes to form a cross flow on the surface of the flat plate membranes and disturb the conductive particles between the flat plate membranes. The application effectively solves the problem of flat plate membrane surface mud cake deposition caused by the operation of AnDMBR at high sludge concentration, prolongs the service life of the dynamic membrane assembly, and improves the anaerobic digestion performance of the reactor.

The application discloses an automatic conveying device, relates to the material conveying technical field, and improves a series of requirements and problems such as long distance, large conveying capacity and high efficiency, maximally reduces labor and material waste, and improves production efficiency, and comprises a hopper, a plurality of standard spiral conveying pipes, a plurality of series joints and a discharge port. The conveying device is assembled by a plurality of standard units, so that the conveying equipment is more miniaturized and simplified, equipment installation, dismounting and transportation are facilitated, different working environments and conditions can be adapted, power output of the conveying device is more stable and efficient by adopting a decentralized arrangement form, the conveying device can realize longer distance transportation, meanwhile, the conveyed materials are transported through a closed pipeline, so that the materials can be prevented from being accidentally spilled, personnel casualty and property loss are avoided, and the conveying device has higher safety. In addition, sealed transportation can effectively control dust pollution, irritating smell and the like, and has higher environmental protection.

The present invention discloses a method for converting multi-source waste biomass into clean energy, including catalyst preparation, multi-source waste biomass mixing and clean energy conversion. The conversion method of the present invention skillfully mixes multi-source biomass including residual sludge, agricultural and forestry waste, livestock and poultry manure, and restaurant waste, adds a homemade catalyst, and effectively realizes the simultaneous conversion of multi-source biomass into clean energy by adjusting the lighting conditions to obtain bioethanol, biodiesel and by-product glycerol; during the reaction process, due to the flexible change of lighting conditions, the lignocellulosic biomass in the multi-source biomass is effectively broken down.

The invention discloses a composite near-natural riverbank ecological buffer zone, comprising a buffer zone, wherein the buffer zone is composed of a first pebble ditch, an arbor and grass plant zone, a soil and water conservation shrub and grass landscape zone, a second pebble ditch and an aquatic plant purification zone in order from the bank slope to the water body, so as to form a buffer zone with both the function of blocking and controlling non-point source pollution and taking into account the landscape benefits. The first pebble ditch, the arbor and grass plant zone, the soil and water conservation shrub and grass landscape zone, the second pebble ditch and the aquatic plant purification zone are filtered layer by layer to effectively purify, infiltrate and store farmland and rainwater runoff. The buffer zone is mostly a combination of plants, and has simple operation and maintenance, low cost and strong operability. The damaged bank slope can be repaired with minimal disturbance, and it is an effective means to improve river water quality, control agricultural non-point source pollution and enhance the diversity of river landscape.

The utility model relates to the technical field of pile foundation sediment cleaning, in particular to a pile foundation sediment thickness efficient cleaning instrument which comprises an upper sediment discharging pipe located on the upper portion, the bottom of the upper sediment discharging pipe is connected with a lower sediment discharging pipe, and the bottom of the lower sediment discharging pipe is connected with an inner collecting pipeline. A gathering cover is installed on the periphery of the bottom of the lower deslagging pipe and the connecting end of the inner collecting pipeline, a plurality of fixing frame bodies and foldable frame bodies for fixing the gathering cover are further arranged on the periphery of the lower deslagging pipe, and an air inlet pipe communicated to the interior of the instrument is further fixedly arranged on the outer side of the upper deslagging pipe. Compared with an existing cleaning mode, the efficient pile foundation sediment thickness cleaning instrument has the remarkable advantages of being efficient, accurate, safe, environmentally friendly and the like, the requirement for pile foundation sediment cleaning can be better met, and the engineering quality and efficiency are improved.

The present application discloses a method, system and equipment for assembling building components of a CS building system, which relates to the field of building technology. The method comprises: collecting environmental parameters of a space where the building component assembly system is located through multiple sensors of the metering module; sending the environmental parameters to the control system so that the control system calculates the environmental parameters according to a preset detection algorithm to obtain a detection result, and compares the detection result with a preset detection threshold. If the detection result is greater than the detection threshold, the building component assembly system is shut down through the control system; obtaining the remaining amount of building materials through the metering module, and judging the remaining amount according to a preset recycling index; if the remaining amount is greater than the recycling index, the remaining amount of building materials is recycled through the control system.

This utility model relates to a point source pollution purification device for river and lake management, comprising a base plate, a packing box, floats, and a housing. The housing is located on top of the base plate, and multiple floats are located at the bottom of the base plate. A main sewage pipe running left-right is located at the top of the housing. A pumping assembly connected to the right end of the main sewage pipe is located on the right side of the housing. Several branch sewage pipes running front-back are evenly arranged along the length of the main sewage pipe at its bottom, and outlets are evenly arranged along the length of the branch sewage pipes at their bottom. Several packing boxes are evenly arranged along the left-right direction below the branch sewage pipes within the housing. The side walls of adjacent packing boxes are tightly fitted together, and the inner wall of the housing is tightly fitted to the side walls of the packing boxes. Water passage holes are evenly arranged at the top and bottom of each packing box. A drain outlet aligned with the bottom of the packing box is located at the bottom of the housing, passing through the base plate. This utility model has the advantages of convenient installation and labor-saving cleaning.

The invention provides a method for preparing ellagic acid from photocatalytic tannin, which is to use plant tannin as raw material, dissolve it in an aqueous solution, add mpg-C3N4 photocatalyst, and perform photocatalytic degradation reaction at a certain temperature; add acid to the reaction solution to adjust the pH value, filter, wash the filter cake, and dry to obtain a crude ellagic acid product; the crude product is refined and purified by alkali dissolution, activated carbon decolorization filtration, and dilute acid reduction precipitation to obtain ellagic acid with a content of ≥98%wt. The preparation method is simple in process and the prepared product has high purity.

The invention provides preparation and application of a composite heavy metal adsorbent, and belongs to the technical field of protein engineering. The invention provides a fusion protein. The fusion protein comprises CBM and metallothionein which are sequentially connected from a C terminal to an N terminal, and the metallothionein comprises MTT1, MTT5, TM1 or TM2. According to the invention, MTT1, MTT5, TM1 and TM2 have heavy metal ion binding preference; the CBM has excellent cellulose adsorption performance. The fusion protein is constructed by utilizing CBM and metallothionein, and the fusion protein can be combined with cellulose to modify the cellulose, so that the compound heavy metal adsorbent with an excellent effect is prepared, and pollution caused by heavy metal ions Cd < 2 + > and Pb < 2 + > is effectively treated.

The invention discloses a flue air leakage monitoring system of a semi-dry desulfurization system, which relates to the technical field of boiler combustion and comprises an air leakage real-time monitoring module, a four-pipe anti-abrasion and anti-explosion safety management terminal, an equipment registration module and a communication alarm module. The complete flue air leakage monitoring system is constructed by arranging the air leakage real-time monitoring module, the four-pipe anti-abrasion and anti-explosion safety management terminal, the equipment registration module and the communication alarm module, pollutant emission can be better controlled by effectively monitoring the air leakage condition of the flue, the requirements of environmental protection laws and regulations are met, the influence on the environment is reduced, and the safety of the flue air leakage monitoring system is improved. The energy consumption of the semi-dry desulfurization system is increased due to air leakage of the flue, air leakage points can be found and repaired in time through air leakage monitoring, so that the energy consumption is reduced, the operation efficiency of the two systems is improved, the air leakage monitoring system automatically gives an alarm when detecting abnormal air leakage, workers can conveniently handle the abnormal air leakage in time, and the downtime and the maintenance cost of equipment are reduced.

The invention discloses polyethylene-like degradable copolyester as well as a preparation method and application thereof. The structural formula of the polyethylene-like degradable copolyester is as follows: # imgabs0 #-R1-is a structural unit of long-chain binary acid or ester thereof,-O-R2-O-is a structural unit of long-chain dihydric alcohol, m is equal to 1-10, n is equal to 1-10, and x is equal to 10-100; and the molar ratio of-R1 <-> to # imgabs 1 # is (3: 2)-(19: 1). The problem that long-chain dihydric alcohol is not easy to remove during polycondensation is solved by adopting an oxalic acid short-chain oligomer-assisted polycondensation method, the oxalic acid content is accurately regulated and controlled, and the main chain of the prepared polyethylene-like degradable copolyester contains a long-chain methylene structure and an oxalate bond, so that the polyethylene-like degradable copolyester has excellent mechanical properties and crystallization capacity, and can be used for preparing polyethylene-like degradable copolyester. The controllable degradation of the controllable polyethylene-like polyester can be realized by regulating and controlling the length of methylene and the number of oxalic acid structures, and the controllable polyethylene-like polyester can be widely applied to plastic products to meet the requirements of different application scenes on the stability and degradation rate of degradable materials.

The present invention provides a breeding tailwater treatment device for controlling agricultural non-point source pollution, which belongs to the field of water treatment technology. It solves the problem that the existing recycling process is cumbersome, and the wastewater cannot be directly recycled and irrigated on the fields, so that farmers cannot enjoy the immediate benefits of agricultural tailwater recycling and treatment, and farmers are unable to support the work of controlling tailwater pollution economically and technically. A breeding tailwater treatment device for controlling agricultural non-point source pollution includes a treatment frame, a breeding field opened on the left and right sides of the treatment frame, a tailwater ditch is opened around the breeding field, a reaction frame is fixed on the treatment frame, and a plurality of silt extraction pumps are fixed in the treatment frame, and each silt extraction pump is connected to the bottom of the tailwater ditch through a conveying structure. The present invention has the ability to realize the automatic recycling of agricultural tailwater generated in the fields in real time, improve the ability to control agricultural non-point source pollution, and purify the tailwater to achieve recycling irrigation.

This utility model discloses a catalyst collection and conveying device at the bottom of the riser pipe of a catalytic cracking unit, belonging to the field of petrochemical technology. It includes a frame platform with a first riser pipe and a second riser pipe mounted on it. A collection hopper is fixedly connected to the bottom of both the first and second riser pipes. In this utility model, fallen catalyst dust is collected by the collection hoppers at the bottom of the first and second riser pipes. The collected catalyst dust is then driven to the inner cavity of a storage tank via a blower, a first electrically controlled valve, an exhaust pipe, a second electrically controlled valve, an upper guide pipe, and a lower guide pipe. The collection hoppers and closed conveying pipes prevent catalyst powder from floating around due to wind during discharge, effectively controlling dust pollution in the unit area, improving the working environment, and protecting equipment and personnel health.

The invention discloses a structure of an underwater anchored yacht wharf, comprising a floating body, a drift intercepting net, a pollution-blocking float, a movable and adjustable gangway, a flexible anti-collision fender, a pollution-blocking float collecting and releasing device, an anti-wave resistance device, a folding strut, an underwater concrete anchor beam, a fixed pile foundation, a lighting pole, a protective railing, a first hinge support, a mooring column, a pedestal and a second hinge support. Protective railings are welded around the top of the floating body, a plurality of lighting poles are arranged on the top of the floating body, and flexible anti-collision fenders are installed around the top of the floating body. The structure of the underwater anchored yacht wharf has good integrity, simple structure, easy modular arrangement according to needs, and convenient promotion; there is no visual pollution of the exposed part of the guide piles above the water, and it is more beautiful; the overall structure has good fatigue resistance; the design of the flexible anti-collision fender weakens the impact force of the yacht body when berthing; the components have no unnecessary wear on the water, the maintenance cost is low, and the economic performance is excellent.

The present application relates to the technical field of carbon black production, in particular to a kind of carbon black and its production process.The present application solves the problems of large viscosity of ethylene tar, incomplete cracking, poor dispersibility and surface inertness of carbon black.First, the raw oil is treated by decalin / NMP complex solvent and ultrasonic wave, then a ferrocene / potassium borate composite catalyst is added, and the double-stage atomization technology is combined with gradient temperature field for combustion cracking;In the reaction quenching section, the modified quenching liquid containing KH-550 and urea is sprayed in the specific temperature zone for in-situ grafting, and finally the finished product is obtained by alternating speed granulation and microwave fluidized drying;The prepared carbon black has the characteristics of high structure, high yield, low impurity and high surface activity, and has high application value in the field of rubber reinforcement and high-performance composite materials.

This invention discloses a method for nitrogen and phosphorus emission reduction through the synergistic application of amino acid-enhanced fertilizer and variable-rate spraying by drones. The method includes: acquiring NDVI / NDRE distribution maps using a multispectral drone before the rice tillering stage to generate a variable-rate fertilizer prescription map; preparing an amino acid-enhanced compound granular fertilizer containing urea, monoammonium phosphate, potassium fertilizer, compound amino acid powder, γ-polyglutamic acid, humic acid, and urease inhibitor, and applying it via drone according to the prescription map; acquiring multispectral information again before the rice booting or heading stage to generate a variable-rate spraying prescription map; preparing an amino acid-nitrogen-phosphorus compound foliar fertilizer containing compound amino acids, urea, potassium dihydrogen phosphate, γ-polyglutamic acid, fucoidan oligosaccharide, and brassinolide, and applying it via drone according to the prescription map. This invention significantly improves nitrogen and phosphorus fertilizer utilization efficiency, reduces nitrogen and phosphorus concentrations in field surface water and runoff loss through the synergistic application of both broadcasting and spraying pathways, achieving fertilizer reduction and yield increase while controlling agricultural non-point source pollution at its source.

The invention provides paenibacillus polymyxa and application of the paenibacillus polymyxa. Wherein the Paenibacillus polymyxa XY8-23 is preserved in the General Microbiological Center of the China Committee for Culture Collection of Microorganisms, and the preservation number of the Paenibacillus polymyxa XY8-23 is CGMCC (China General Microbiological Culture Collection Center) NO. 31696. The invention provides a complex microbial inoculant. The complex microbial inoculant comprises bacillus velezensis Bv-HR6-1 and the paenibacillus polymyxa XY8-23. The invention also provides a preparation method of the complex microbial inoculant. The invention further provides a seedling culture substrate using the complex microbial inoculant. The bacteria XY8-23 can effectively improve epidemic disease prevention and control of crops such as greenhouse vegetables, melons and fruits, and the bacteria Bv-HR6-1 can effectively improve the salt stress resistance of the crops such as greenhouse vegetables, melons and fruits, so that the complex microbial inoculant formed by compounding the bacteria XY8-23 and the bacteria Bv-HR6-1 has the effects of treating soil secondary salinization and preventing and controlling epidemic diseases of the crops; the seedling raising substrate can also improve the immunity of plants, treat heavy metal pollution and regulate the micro-ecology of soil. In addition, the application method of the complex microbial inoculant is simple, easy to operate, time-saving, labor-saving and wide in universality.

An intelligent respiratory specimen self-service sampling device comprises a sampling room, the sampling room comprises a sampling room roof (1), a sampling room body (2), a sampling room door (3) and a sampling room floor (4), a self-service machine (5) is arranged inside the sampling room body (2), an inclined table is arranged in the middle of the self-service machine (5), a specimen container outlet (13) is arranged on the left side of the inclined table, a specimen container inlet (14) is arranged on the right side of the inclined table, an ID card scanning area (15) is arranged on the inclined table near the specimen container inlet (14), a display screen (9) is arranged above the inclined table, and an information receipt sticker outlet (10) is arranged between the inclined table and the display screen (9). A user enters the sampling room, scans the ID card information, prints the information receipt and receives the container for retaining the specimen, retains the specimen according to the prompt, and after leaving, the sampling room is automatically disinfected and sterilized, which can effectively control environmental pollution and cross infection of users.

The application provides a metal monatomic photocatalyst, a preparation method and application thereof. The preparation method of the metal monatomic photocatalyst comprises the following steps: (a) adding metal chloride, polyvinylpyrrolidone and metal oxide powder into water, uniformly stirring continuously to obtain a precursor suspension, and centrifuging the obtained precipitate to obtain a precursor material; (b) washing the precursor material in step (a), and performing high-temperature calcination under a hydrogen atmosphere after drying to obtain the metal monatomic photocatalyst. The metal monatomic photocatalyst can rely on the synergistic regulation of energy band structure of double active sites of metal monatomic and oxygen vacancies, improve the light excitation capacity of the photocatalyst, and synergistically adsorb nitrate substrates, so that the activity and selectivity of the reaction of photocatalytic reduction of nitrate to synthesize ammonia are improved.