273 results about "Biological pollution" patented technology

The invention relates to the technical field of water quality monitoring, in particular to a water quality monitoring analysis method and system of a water conservancy system. The method comprises the following steps: acquiring area scale and water area type distribution, and carrying out sensing planning layout and water quality index real-time monitoring to obtain a water conservancy system water quality index data set; performing regional water quality index distribution coupling and regional time step division on the water conservancy system to obtain a corresponding water conservancy pH value, water conservancy dissolved oxygen concentration, water conservancy turbidity, water conservancy heavy metal concentration and water conservancy microorganism concentration; performing microorganism growth efficiency evaluation and microorganism pollution attenuation analysis on the water conservancy microorganism concentration to obtain a water conservancy area microorganism pollution degradation attenuation rate; and performing water quality pollution anomaly quantification and anomaly category decision management on the water quality index data set of the water conservancy system to generate a water quality anomaly category management strategy so as to execute corresponding regional water quality category management work of the water conservancy system. The accuracy and efficiency of water quality monitoring can be improved.

The invention relates to methods, uses, systems, arrays, engineered nucleotide sequences and vectors for inhibiting bacterial population growth or for altering the relative ratio of sub-populations of first and second bacteria in a mixed population of bacteria. The invention is particularly useful, for example, for treatment of microbes such as for environmental, medical, food and beverage use. The invention relates inter alia to methods of controlling microbiologically influenced corrosion (MIC) or biofouling of a substrate or fluid in an industrial or domestic system.

The invention provides a puree production line microbial pollution risk real-time monitoring and early warning method, which comprises the following steps: deploying multiple types of sensors, an industrial camera and an operation log interface, collecting environmental temperature and humidity, pH value, dissolved oxygen, image and operation behavior multi-modal data in a fermentation tank in real time, and carrying out edge calculation and standardized preprocessing to obtain the microbial pollution risk of a puree production line. Data missing, abnormity and time sequence difference are eliminated; multi-modal features and a dynamic knowledge graph constructed based on a production process and a pollution event are fused, and a deep learning model and a graph neural network are utilized to realize microbial pollution risk probability intelligent prediction; risk grading and a dynamic weighting algorithm are introduced, grading early warning signals and disposal suggestions are automatically generated, and a production control system is linked to execute response measures; according to the subsequent production state, continuous feedback is carried out, the model and the early warning threshold are adjusted in a self-adaptive mode, and the accuracy, response efficiency and production safety of pollution early warning are remarkably improved.

The invention discloses a water environment monitoring system and method based on big data analysis, relates to the technical field of environment monitoring, and solves the technical problems that only monitoring of water quality parameters is concerned, the influence of biological factors, human activity factors and the like on the water environment is ignored, and the overall monitoring and evaluation accuracy of the water environment is reduced. Through the water environment data acquisition module, various water environment related data including water quality, hydrology, organisms, crowds, pollution sources and other information can be widely collected, comprehensive monitoring of the water environment is realized, and the influence of biological factors and human activity factors on the water environment is comprehensively considered. The calculation of the biological diversity index and the biological pollution index reflects the structure and health condition of the biocenosis, the water quality monitoring and early warning module can perform real-time monitoring and evaluation according to the water environment value, and through comparison with the threshold value and matching with the water quality grade interval, the abnormal condition of the water quality is found in time, and early warning information or an evaluation report is generated.

The invention relates to the technical field of water treatment, and provides a reverse osmosis membrane cleaning method, a cleaning agent composition and application. According to the method, whether cleaning is needed or not is determined by comparing initial operation parameters and current operation parameters of a system; the pollutant type is accurately judged by observing the appearance characteristics of the membrane surface and detecting related index parameters; and selecting a corresponding cleaning agent formula according to the pollutant type, and sequentially performing physical washing and chemical cleaning. The cleaning agent composition comprises a biological pollution cleaning agent, an organic pollution cleaning agent and / or an inorganic scaling cleaning agent. By establishing a scientific pollution diagnosis system and a targeted cleaning strategy, the problems of fixed cleaning scheme and low pertinence in the prior art are solved, the pressure difference recovery rate after cleaning can reach 90% or above, the desalination rate recovery rate can reach 99% or above, the cleaning efficiency is remarkably improved, the operation cost is reduced, and the service life of the membrane is prolonged.

The invention discloses a microbial safety prediction method and system for retort pouch food and a medium, and relates to the field of retort pouch food sterilization, and the method comprises the following steps: obtaining basic data, microbial pollution data and microbial heat resistance data of to-be-processed retort pouch food; calculating the initial pollution amount of the to-be-processed retort pouch food based on the configuration proportion of the different raw materials and the number of microorganisms corresponding to the different raw materials; based on the initial pollution amount, the formula parameters and the process parameters, the total pollution amount of the to-be-processed retort pouch food is calculated; based on the total pollution amount and the process parameters, calculating the process sterilization amount of the to-be-processed retort pouch food; calculating target sterilization time of the to-be-processed retort pouch food based on the process sterilization amount, the process parameters and the microorganism heat-resistant data; and when the target sterilization time is less than or equal to the preset sterilization time, the to-be-processed retort pouch food does not have the problems of microbial safety and corruption in subsequent production. According to the method, the microbial safety of the retort pouch food is effectively predicted in the earlier stage of production of the retort pouch food.

A particulate oxide composition comprising cerium oxide, trivalent dopant, and optional additional metal oxide, other than cerium oxide and trivalent dopant, is beneficial to aid in the removal of biological contaminants, such as bacteria, viruses, fungi, protozoa (e.g., amoebae), yeast and algae. This particulate oxide composition contains more cerium oxide than trivalent dopant and has a unique depth profile in which the average trivalent dopant to Ce ratio at about 0 nm to about 3.5 nm from the surface of the particulate composition is greater than the trivalent dopant to Ce ratio at about 15 nm from the surface of the particulate composition. These trivalent doped cerium oxide compositions can be used to remove these biological contaminants from fluids, including air and water, and from solid surfaces. Also described are methods of using compositions containing these trivalent doped cerium oxide compositions to remove biological contaminants.

The invention relates to the technical field of microbiological detection, in particular to a public area microbiological pollution risk assessment system based on spectral analysis, which comprises a spectrum acquisition module used for acquiring a Raman spectrum curve of microorganisms contained in the air of a public area; the spectrum correction module is used for carrying out baseline correction on the Raman spectrum curve, specifically, baseline values of the Raman spectrum curve at all wavelengths are determined, and the corrected Raman spectrum curve is obtained; the feature analysis module is used for identifying the types of the microorganisms, specifically, the feature evaluation value of each wave crest is calculated, all the wave crests are distinguished, and a feature main peak and a feature shoulder peak are obtained; extracting characteristic peaks contained in the acromion; identifying the types of microorganisms in the air; and the risk assessment module assesses the microbial pollution risk of the public area. According to the method, misjudgment and missing detection caused by characteristic peak overlapping are reduced, and the accuracy of microorganism variety identification is improved, so that the pollution risk of microorganisms in a public area is accurately evaluated.

The invention relates to the technical field of reverse osmosis membranes, in particular to a multilayer composite anti-biological-pollution reverse osmosis membrane and a preparation method thereof. The reverse osmosis membrane is prepared by the method. The method comprises the following steps: immersing a base membrane into a prepared water phase solution, and sequentially carrying out first immersion treatment and drying treatment in the shade to obtain a first membrane sheet; immersing the first membrane into a prepared organic phase solution, removing the redundant organic phase solution on the first membrane after second immersion treatment, and obtaining a second membrane after interface reaction; and immersing the second membrane into a prepared antibacterial metal ion solution, and carrying out complexation reaction to obtain the multi-layer composite anti-biological-pollution reverse osmosis membrane. According to the invention, the multilayer composite anti-biological pollution reverse osmosis membrane with prolonged antibacterial activity and improved membrane separation performance can be prepared.

The invention discloses a method for cooperatively controlling biological pollution of a reverse osmosis membrane by group quenching bacteria and bacteriophages. According to the invention, a QQ-bacteriophage carrying system composed of quorum quenching (QQ) bacteria and lysing bacteriophages is constructed, and the bacteriophages and the QQ bacteria are utilized to synergistically improve the inhibition effect on biofilm formation and biological pollution. In the QQ-bacteriophage carrying system, the bacteriophage can perform targeted lysis on core contaminating bacteria, and the QQ bacteria can degrade quorum sensing molecules, weaken an anti-bacteriophage defense system of the bacteria and promote movement and infection of the bacteriophage in a biological membrane. Therefore, the QQ-bacteriophage carrying system can remarkably improve the biological membrane removal efficiency, recover the membrane flux and prolong the service life of the reverse osmosis membrane. The invention can provide an efficient, green and sustainable biological pollution control solution for the fields of water treatment, seawater desalination, industrial wastewater reuse and the like.

The invention discloses an environment-friendly anticorrosive coating for ships and a preparation method thereof, and belongs to the technical field of anticorrosive coatings. The preparation method comprises the following steps: mixing 2-ethylhexyl acrylate, methyl methacrylate, allyl polyethyoxyl sulfonate, n-hexadecane, alkyl polyoxyethylene ether and deionized water, adding a polyurethane-polyurea emulsion, antibacterial functional microspheres, a wear-resistant functional filler and aluminum paste, stirring and dispersing, and adding ammonium persulfate for polymerization reaction to obtain a polyurethane-polyurea-acrylic emulsion; and finally, mixing a curing agent to obtain the environment-friendly anticorrosive paint for ships. The anticorrosive paint is a water-based paint, and is more environment-friendly and safer compared with a paint using an organic solvent; the antibacterial functional microspheres take urea-formaldehyde resin as a shell, so that the antibacterial functional microspheres have better compatibility with the anticorrosive paint; baicalin is free of pollution to the marine environment, has a broad-spectrum antibacterial effect, and is beneficial to inhibition of initial growth of fouling organisms, reduction of attachment and reproduction of the fouling organisms on the surface of a ship and reduction of the risk of biological fouling.

The utility model discloses a vacuum centrifugal concentrator which comprises a machine frame shell, a middle partition plate is fixed between the inner walls of the two sides of the machine frame shell, a driving motor is arranged below the middle partition plate, a vacuum pump and a low-temperature cold trap are arranged on the two sides of the driving motor respectively, and a casting aluminum pot is further arranged in the machine frame shell. A touch control integrated screen and a pull-push door handle are further arranged on the top of the machine frame shell, and a damping device is further arranged on the middle partition plate. According to the vacuum centrifugal concentrator, a large sealed casting aluminum pot is vacuumized, a horizontal rotor is adopted to perform rotary centrifugation on a sample, a refrigeration sheet and a far infrared heating tile are mounted in the aluminum pot, and a cold trap is externally arranged to capture and prevent biological pollution, so that the problems of temperature control and explosion boiling of the sample in the concentration process are solved, and the concentration effect is ensured; and meanwhile, refrigeration and infrared heating can be realized, so that various experimental requirements of freeze-drying, concentration and the like are met, and the concentration efficiency is greatly improved.

The invention discloses a central air conditioner pollution degree autonomous evaluation robot based on multi-modal perception, and relates to the technical field of intelligent detection, the robot comprises a voxel space division module, a data acquisition module, a pollution characteristic mapping modeling module, a physical pollution detection module, a chemical pollution detection module and a biological pollution detection module; through three-dimensional point cloud data scanning and real-time data acquisition, the air pipe wall surface roughness, the temperature delay time, the gas fluctuation, the heat retention degree and the microbial metabolism gas concentration are monitored in real time, and a three-dimensional pollution characteristic mapping model is generated according to the pollution characteristic data set; by calculating a physical pollution index PPI, a chemical pollution index CPI and a biological pollution index BPI and comparing and analyzing with corresponding threshold values, whether dust retention, gas concentration and microorganism quantity in an air pipe exceed standards or not is judged in real time, cleaning, filtering and sterilizing strategies are automatically triggered, and the air quality and operation safety of a central air conditioning system are effectively guaranteed.

The invention provides a bacteriostatic proppant technology based on a palladium oxide-reduced graphene oxide composite material, aiming at the problem of hydrogen loss caused by microbial activity in a hydrogen storage bank of an exhausted gas reservoir. A PdO (at) rGO composite material functionally modified by lead ions (Pb < 2 + >) is loaded on the surface of a porous ceramsite carrier to form an adsorption-inactivation-blocking synergistic antibacterial network; precise laying of the proppant in a crack network is achieved through the end sand removal technology, hydrogen consumption is reduced, and an efficient, economical and environment-compatible innovative solution is provided for biological pollution control of the underground hydrogen storage library.

The invention discloses a method for constructing an antibacterial film interface by chemical bond cross-linked antibacterial peptide, and belongs to the field of drinking water purification and wastewater pollution treatment. The invention aims to solve the problems that the existing microorganisms cause serious pollution to the membrane, the requirement on the operation environment in the membrane modification process is high, and antibacterial active substances on the surface of the membrane are released. An ultrathin antibacterial peptide modified layer is constructed on the surface of the membrane through alkali-activated air oxidation-Michael addition / Schiff base reaction, the stability of antibacterial active substances on the surface of the membrane is maintained through chemical crosslinking of plant polyphenol, and long-acting biological pollution resistance is achieved. The invention provides a method for constructing an anti-pollution membrane interface by chemical bond crosslinking antibacterial peptide. According to the method, the structure of the base membrane is not damaged, the method is simple, adjustable, short in period and low in cost, the thickness of the coating layer is nanoscale, the ultrathin coating layer relieves reduction of modification on the water passing capacity of the membrane, the hydrophilicity and the antibacterial property are remarkably improved, extra pressurization energy consumption is not needed, and filtering can be achieved through gravity water head driving.

The invention relates to the technical field of jasmine flower processing, and discloses a jasmine flower tea clean production process which comprises the following steps: S1, compound excitation pretreatment of jasmine flowers: performing ultrasonic treatment and ozone activation treatment on fresh jasmine flowers; s2, performing low-temperature dynamic multi-phase scenting: mixing the treated jasmine flowers with tea leaves, and performing multi-stage scenting by using a partitioned dynamic gas phase regulation and control system; s3, aroma trapping and re-injection: trapping non-adsorbed aroma components in the scenting tail gas through a molecular sieve adsorption and condensation recovery technology, and circularly injecting into the scenting chamber; s4, performing comprehensive drying on the tea leaves and the remaining flowers: performing a combined drying process of microwave drying, infrared drying and vacuum drying on the scented tea leaves; and carrying out water extraction and alcohol precipitation or fermentation conversion on the scented residual flowers. Through the synergistic effect of ultrasonic waves and ozone, the jasmine flower fragrance release efficiency is improved, microbial pollution is reduced, the adsorption efficiency of tea on aromatic molecules is improved, and fragrance waste is reduced.

The invention discloses a loose nanofiltration membrane with a slow-release sterilization function and a preparation method of the loose nanofiltration membrane. The nanofiltration membrane can realize slow release and long-acting antibiosis of silver ions. The preparation method of the membrane comprises the following steps: synthesizing UiO-66-NH2 nano particles by a hydrothermal method, mixing the UiO-66-NH2 nano particles with an AgNO3 solution, and reducing by using NaBH4 to prepare Ag-coated UiO-66-NH2 nano particles; the preparation method comprises the following steps: blending Ag-coated UiO-66-NH2 and polybenzimidazole, preparing a PBI-based mixed matrix membrane by using a non-solvent induced phase inversion method, and then crosslinking the PBI-based mixed matrix membrane by using trimesoyl chloride to obtain the biological pollution resistant loose nanofiltration membrane. Test results show that the loose nanofiltration membrane prepared by the method has excellent dye desalination performance and antibacterial performance. The salt retention rate is less than 1% while the crystal violet dye retention rate is kept to be 99% or above. An antibacterial experiment shows that after the membrane is co-cultured for 36 hours, the antibacterial rates of the membrane on escherichia coli and staphylococcus aureus respectively reach 97.4% and 96.3%. Slow-release experiments show that the prepared loose nanofiltration membrane can stably maintain the release amount at 0.1 [mu] g.L <-1 >. Day <-1 >, and can realize long-term effective sterilization.

A surface bio-contamination assay kit (1) comprising a disposable swab cartridge (2) comprising a swab (29); a sampler (3) designed to removably receive the cartridge (2) and to wipe the cartridge swab (29) on a surface to be collect a sampled, along a predetermined sampling path (4) designed to cover a predetermined surface area; and a bio-contamination meter (5) designed to removably receive the cartridge (2) after sampling and to measure bio-contamination of the collected sample on the cartridge (2).

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 application provides a rapid microbial contamination detection method and system based on ATP fluorescence detection. The optimal reaction conditions of different types of microbial samples are determined, a to-be-detected sample and an ATP fluorescence detection reagent are mixed and reacted to generate a reaction mixture with maximum ATP release efficiency; the gain level is automatically adjusted according to the preliminarily measured fluorescence signal intensity, the fluorescence signal intensity value of the reaction mixture is measured to generate an optimized fluorescence signal intensity value; the preliminary prediction result of the microbial contamination degree is generated by comparing and analyzing the optimized fluorescence signal intensity value with a preset microbial ATP content standard curve; the credibility of the detection result is evaluated, and the detection result is sent to a remote monitoring platform to realize real-time monitoring and early warning of the microbial contamination situation. The technical scheme provided by the application improves the accuracy and response speed of microbial contamination detection.

The invention discloses a pig farm sand table decontamination and pollutant monitoring early warning system, and relates to the field of pig farm early warning. Comprising a multi-modal sensor array module which comprises a biological pollution detection unit, a chemical pollution detection unit and a radioactivity detection unit and is used for collecting pig house environment and multi-dimensional pollution data in the decontamination process in real time; and the digital twinborn decontamination deduction module renders a pollution diffusion cloud picture in real time, superposes virtual actions of decontamination equipment and predicts a pollutant diffusion path. According to the pig farm sand table decontamination and pollutant monitoring and early warning system, high-frequency acquisition of biological, chemical and radioactive pollution is realized through a multi-mode sensor array, multi-dimensional pollution feature vectors are generated through wavelet transformation and Kalman filtering preprocessing, pollution risk levels are output in combination with a fuzzy logic algorithm, yellow / orange / red three-level accurate early warning is realized, and the accuracy of pig farm sand table decontamination and pollutant monitoring and early warning is improved. Compared with traditional single-index early warning, the comprehensive early warning accuracy is improved, and meanwhile the missed alarm rate is reduced.

The invention discloses a biological-pollution-resistant polyethersulfone self-supporting ultrafiltration membrane as well as a preparation method and application thereof. The ultrafiltration membrane is prepared by fixing cellulose nanocrystals and antibacterial ions on the surface and in membrane holes of a polyethersulfone membrane through a polyphenol monomer. The biological pollution resistant polyether sulfone self-supporting ultrafiltration membrane provided by the invention can stably load a hydrophilic material and a bacteriostatic material, so that the ultrafiltration membrane has excellent hydrophilic performance and biological pollution resistance, and can be efficiently and stably applied to the field of water treatment or biological material treatment.

The invention relates to the field of ultrafiltration membranes, in particular to a seawater-corrosion-resistant ultrafiltration membrane for water treatment and a preparation method of the seawater-corrosion-resistant ultrafiltration membrane, which are used for solving the problems that the conventional ultrafiltration membrane is easily corroded and polluted in a seawater water treatment environment, so that the performance of the ultrafiltration membrane is remarkably reduced, and the water treatment cost and the operation difficulty are increased. The ultra-filtration membrane takes a carboxyl fluorine-containing polyarylether sulfone material as a main raw material, so that the ultra-filtration membrane has good chemical stability and corrosion resistance in a seawater environment, a quaternized zinc-based metal organic framework material is added into the ultra-filtration membrane, and a porous structure of the quaternized zinc-based metal organic framework material is utilized to enable the ultra-filtration membrane to have higher permeability, so that the removal performance of the ultra-filtration membrane is improved; meanwhile, the ultra-filtration membrane can be endowed with excellent antibacterial performance, formation of a biological membrane is effectively inhibited, biological pollution is avoided, the self-cleaning and anti-pollution capacity of the ultra-filtration membrane can be improved by adding the modified nano molybdenum disulfide powder, the removal performance of the ultra-filtration membrane is guaranteed for a long time, and the water treatment effect is improved.

The invention relates to a method for controlling biological pollution of a reverse osmosis membrane through photoelectrochemical filtration pretreatment. According to the method, a photoelectrochemical reactor is mainly established to inhibit the bacterial biofilm forming ability under ultraviolet illumination and voltage conditions. The photoelectric chemical reactor is composed of a peristaltic pump, a magnetic stirrer, a reactor, an electrochemical filtering assembly, a direct-current power source and an ultraviolet light source and inhibits bacteria added into the reactor from forming a biological membrane. Under the action of voltage, the electrochemical filter assembly inhibits the biofilm forming ability and viability of bacteria by degrading protein and quorum sensing signal molecules in water, and more thoroughly inhibits the biofilm formation through the irradiation of ultraviolet light. Therefore, according to the method disclosed by the invention, the ultraviolet light can be combined with the electrochemical filter assembly to realize effective inhibition of a biological membrane formed by bacteria, the reduction of membrane flux is reduced, and the method has important significance in controlling biological pollution of the reverse osmosis membrane.

Disclosed are devices and methods using same for taking surface samples of bulk materials or loose materials for testing purposes (e.g., presence of pathogens, microorganisms, contaminants, etc.) in a manner that improves efficiency, reliability, repeatability, and case of use. The methods and devices provide for protecting the sample from accidental outside contamination by providing for immediate placement of collected pieces of material into a protected sampling container or collection space. The methods and devices require less hand-eye coordination skill than using a knife, and are thus more easily used by workers and / or by robots to achieve consistent results.

A zirconium polymer composition comprising a zirconium polymer selected from the group consisting of polymeric zirconium oxychloride, polymeric zirconium acetate, and polymeric zirconium nitrate and having metal particles thereon is beneficial to aid in the removal of biological contaminants, such as bacteria, virus, yeast, algae, and amoeba, from fluids, including air and water. In this composition, the metal is selected from the group consisting of aluminum (Al), antimony (Sb), arsenic (As), barium (Ba), silicon (Si), boron (B), copper (Cu), gold (Au), lead (Pb), mercury (Hg), nickel (Ni), silver (Ag), thorium (Th), tin (Sn), zinc (Zn), and mixtures thereof, and the metal particles are about 0.001% by weight to about 30% by weight of the composition. These zirconium polymer compositions are used in methods for removing biological contaminants from fluids.

The utility model discloses a waste liquid collecting structure of a clean bench, which effectively facilitates the dumping of waste liquid during the operation of the bench, and comprises a bench body, the front side of the bench body is fixedly connected with an operation bench, the left and right side walls of the bench body are fixedly connected with a connecting block, and the left and right side walls of the bench body are fixedly connected with the connecting block. A first liquid discharging channel is formed in each connecting block, a liftable baffle is arranged in each first liquid discharging channel, and a collecting barrel is detachably connected to the lower side of each first liquid discharging channel; the rear side of the first liquid discharging channel is communicated with a negative pressure channel used for providing negative pressure for the interior of the first liquid discharging channel. The liquid discharging device is novel in structure, ingenious in conception and easy and convenient to operate, effectively facilitates operation of workers, enables opening and closing of the blocking plate to be smoother, achieves a better sealing effect, reduces the risk of biological pollution, and is suitable for popularization and application. And the diffusion probability of the polluted aerosol is reduced.

A composition (100) for inhibiting growth of microbial contamination is disclosed The composition includes a plurality of volatile antimicrobial components (110) including at least one of potassium sorbate and sorbic acid. The composition further includes a plurality of non-volatile antimicrobial components (120) including natamycin. A weight ratio of the plurality of volatile antimicrobial components to the plurality of non-volatile antimicrobial components is in the range of 10:2 to 10:1. The composition is placed at a distance from a target surface to inhibit microbial growth on the target surface by releasing the plurality of volatile antimicrobial components and the plurality of non-volatile antimicrobial components into a surrounding air. The target surface is exposed to microbial contaminants. moisture and humidity.

The specific embodiments of the present disclosure provide a hydrophobic and oleophobic film layer and a preparation method thereof. The hydrophobic and oleophobic film layer is prepared by plasma chemical vapor deposition of a perfluoropolyether monomer including an acrylate group and a monomer having two or more carbon-carbon unsaturated bonds. The hydrophobic and oleophobic film layer has good hydrophobicity and oleophobicity, as well as hydrophobic stability and double 85 stability, and is environmentally friendly. The application of the film layer does not cause biological pollution.

The invention discloses a special membrane material for targeted trapping of macrobrachium larvae in water and a preparation method of the special membrane material, and belongs to the field of water environment biological pollution prevention and control. The membrane material is of a multi-layer composite structure and comprises a nanofiber membrane base material layer, an interface adhesion layer and a functional modification layer. The interface adhesion layer is bionic coacervate gel formed by curing hydrophobic polyelectrolyte and phytic acid; the functional modification layer is covalently grafted with a bionic adhesion protein active peptide fragment and a macrobrachium larva chemical pheromone. The material actively attracts larvae to approach through chemical pheromones, high-strength adhesion capture is achieved through bionic peptide fragments rich in aromatic and cationic amino acids, and trapping is integrated. The preparation method comprises the steps of electrostatic spinning of a base material, surface activation, gel coating, functional modification and the like. The material disclosed by the invention has high selectivity and high capture rate on the larvae of the Limnoperna fortunei, is environment-friendly, long-acting and stable, and is suitable for green prevention and treatment of fouling of the larvae of the Limnoperna fortunei in facilities such as water pipelines and pump stations.