111 results about "Biological pollution" patented technology

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 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 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 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 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.

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.

A water recycle system may be implemented to analyze and selectively recycle wastewater generated by an industrial textile washer. In some examples, wastewater generated by the industrial textile washer undergoes various treatment processes to generate a clarified wastewater that is stored before being recycled for reuse in the textile washer. Microbial contamination can grow in this stored water over time and the water can become odorous, which is undesirable when subsequently reusing the water to wash textiles. Systems and techniques can be implemented to treat the clarified water to control odor and / or microbial contamination, improving the effectiveness and quality of the water recycle system.

The invention relates to equipment for transferring medical biological samples, belongs to the technical field of medical instruments, and solves the problems that in the prior art, in the transfer process of bagged samples, leakage occurs, biological pollution and cross infection are likely to be caused, and even the personal safety of operators is affected. The device comprises a box body and a first sample bearing module, the first sample bearing module is arranged in the box body; the first sample bearing module comprises a positioning unit, a bearing unit and a lifting unit; the bearing unit is used for bearing a first sample; the positioning unit is used for fixing the carrier unit; the lifting unit is connected with the bearing unit and used for lifting the bearing unit and enabling the bearing unit to enter or leave the positioning unit. According to the invention, leakage in a sample transfer process can be prevented, and risks of biological pollution and cross infection are reduced.

The invention belongs to the technical field of decontamination, and particularly discloses a sea cucumber artificial culture biological decontamination device which comprises a culture pond, side tables are fixedly installed on the two sides of the top of the culture pond, L-shaped moving tables are movably installed above the two side tables, and through grooves are formed in the surfaces of the ends, located in the culture pond, of the L-shaped moving tables. A through groove is formed in the top of the culture pond, a swing mechanism is installed in the through groove, extrusion mechanisms are installed at the four end corners of the top of the culture pond, a reset mechanism is arranged at the top of the swing mechanism, and a material pushing plate is movably arranged in the culture pond. The L-shaped moving table and the material pushing plate horizontally move in the culture pond, the material pushing plate can push impurities floating on the water surface of culture water to the end of the culture pond, workers can conveniently clean the impurities on the water surface, under cooperation of the extrusion mechanism and the swing mechanism, the material pushing plate can incline, the impurities on the water surface of the culture water can be lifted up, and therefore the impurities on the water surface of the culture water can be removed. And the cleaning of the impurities by workers is further facilitated.

A system (200) comprising a light source (220) configured to produce light source radiation (221) comprising at least in part UV radiation, wherein the system (200) further comprises a luminescent material (400) configured to convert a portion of the light source radiation (221) into luminescent material radiation (401), wherein the luminescent material radiation (401) comprises one or more of: visible light and infrared radiation, wherein the system (200) is configured to produce system light (201) comprising the light source radiation (221) and the luminescent material radiation (401).

The utility model relates to air purification technical field discloses a filter side replacement formula high -efficient air supply outlet, including the box, the box top fixedly connected with the apron, the both sides of box all are provided with the replacement door, the box bottom is provided with the fairlead, two support frames are fixedly connected in the box, and the filter screen is arranged between two support frames, the box inside is provided with cleaning assembly, and the both sides of box all are provided with two fixed components. In the utility model, when the air supply outlet runs, the filter screen dust and the fairlead dust fall cause the ventilation efficiency to drop, starts the air cylinder, drives the sliding block along the slide rail linear motion, drives the rotary rod and the horizontal sweep of cleaning brush, engages through the gear and the rack, converts linear motion into compound motion to complete the filter screen cleaning, realizes the dynamic stable maintenance of filter screen airflow resistance, the uniform guarantee of fairlead front end pressure and the effective reduction of microbial pollution risk.

The utility model discloses an MBR (Membrane Biological Reactor) flexible ultrafiltration flat sheet membrane, which belongs to the technical field of purification membranes, and adopts the technical scheme that the MBR flexible ultrafiltration flat sheet membrane comprises a wear-resistant antibacterial outer layer, a stress dispersion support layer is arranged at the bottom of the wear-resistant antibacterial outer layer, and an efficient ultrafiltration separation layer is arranged at the bottom of the stress dispersion layer. The bottom of the efficient ultrafiltration separation layer is provided with an elastic buffer damping layer, the bottom of the elastic buffer damping layer is provided with a corrosion-resistant anti-seepage inner layer, the wear-resistant antibacterial outer layer is arranged to inhibit bacterium breeding, prevent biological pollution, guarantee long-term cleanness of the membrane and avoid secondary pollution of effluent quality, the stress dispersion supporting layer provides strong supporting force, and the service life of the membrane is prolonged. The elastic buffer damping layer absorbs water flow impact energy, reduces membrane vibration and reduces the damage risk, the efficient ultrafiltration separation layer can accurately remove various micro pollutants including small molecules and special pollutants in water, and the advanced wastewater treatment requirements of specific industries are met.

The invention discloses a roof self-purification evaporative cooling method and system. The method comprises the following steps that S10, a roof is cooled through spraying of a spiral-flow type atomizing nozzle or rainwater; s20, the automatic flow discarding module collects spraying water or rainwater; the automatic flow discarding module discards spray water or rainwater with gravel impurities at the initial stage through the control system, and then discharges clear spray water or rainwater to the integrated electrochemical water treatment module; s30, in the integrated electrochemical water treatment module, spraying water or rainwater is subjected to electric flocculation precipitation through an electric flocculation unit, filtered through an oxygenation filtering unit and then subjected to electrooxidation disinfection treatment through an electrooxidation disinfection unit; and S40, the spraying water or rainwater subjected to electric flocculation and electrooxidation disinfection treatment is pumped and flows back to the spiral-flow type atomizing nozzle. Through the arrangement, roof rainwater can be effectively collected and purified, the problems of nozzle blockage and biological pollution caused by reuse water are solved, the roof temperature and the building cold load are reduced through intelligent spraying, and the system is suitable for humid and hot and high-radiation areas.

The invention belongs to the technical field of material surface performance detection, and particularly relates to a method for detecting biological pollution resistance and durability of a silicone rubber surface, and the method comprises the following steps: S1, sequentially carrying out biological membrane inhibition rate quantitative detection, antibacterial adhesion detection, protein adsorption resistance test and surface wettability test on a silicone rubber sample to be detected; s2, carrying out durability treatment on the parallel sample; s3, repeating partial or all tests in the step S1 on the sample treated in the step S2; s4, comparing the performance data obtained in the step S1 and the performance data obtained in the step S3, and evaluating the biological pollution resistance and durability of the silicone rubber sample. According to the invention, biological membrane inhibition rate quantitative detection, anti-bacterial adhesion detection, anti-protein adsorption performance test, surface wettability analysis and durability test are organically combined to form a complete evaluation closed loop from molecular adsorption to microbial community and from immediate efficiency to long-acting stability, and all key links of biological pollution are comprehensively covered.

This invention provides an integrated device for controlling microbial contamination in seawater desalination, comprising a base, a high-pressure pump mounted on the left side of the base, an online flow cytometer system mounted on the base, and an RO membrane holder mounted on the right side of the base. The base facilitates the installation of the dosing mechanism, diaphragm pump, and online flow cytometer system. The high-pressure pump pressurizes and delivers seawater for subsequent desalination via the RO membrane. The online flow cytometer system monitors the microorganisms in the seawater delivered by the high-pressure pump and simultaneously controls the diaphragm pump to deliver the bactericide from the dosing mechanism upstream of the cartridge filter, sterilizing the seawater entering the RO membrane and thus extending the cleaning cycle and lifespan of the RO membrane.

The invention discloses a rodlike carbon nitride-polydimethylsiloxane composite coating and a preparation method and application thereof.The rodlike carbon nitride-polydimethylsiloxane composite coating is prepared by mixing rodlike carbon nitride filler, polydimethylsiloxane and a curing agent, and even doping of the rodlike carbon nitride filler can effectively improve the crosslinking density of the composite coating; the adhesive force and the tensile strength of the coating are enhanced; when the composite coating is applied to the surface of a matrix, a multifunctional nano coating with mechanical reinforcement, long-acting corrosion prevention and microbial antifouling characteristics can be formed, the impedance arc radius is kept at 5.17 * 10 < 9 > omega.cm < 2 > after the composite coating is soaked for 60 days, and the composite coating shows excellent bacteriostasis and sterilization performance on chlorella and escherichia coli; the excellent biological pollution prevention characteristic is shown.

The application discloses a method for modifying an anion exchange membrane by using lysozyme and THPS, which comprises the following steps: step 1, pretreating a commercial anion exchange membrane; step 2, adding a reaction solution 1 containing levodopamine and lysozyme into a feed liquid chamber of a modification device, and making one side of the pretreated original membrane contact with the reaction solution 1; after stirring reaction is completed at room temperature, the reaction solution is poured out, and the obtained membrane is washed with deionized water to obtain an E-Lys membrane; step 3, adding a reaction solution 2 containing THPS into the feed liquid chamber, and making the modified side of the E-Lys membrane contact with the reaction solution 2 to generate a Mannich-type reaction; after continuous reaction is completed at room temperature, the reaction solution is poured out, and the modified membrane is washed with deionized water to obtain an E-Lys@Thps membrane. The application obtains a green and environment-friendly anion exchange membrane with good anti-biological pollution performance, bacteriostatic performance and separation performance.

According to the microbial pollution treatment system and method based on the medium-pressure ultraviolet and the hydrogen peroxide, an intelligent cooperative control strategy with the water inlet flow and the ultraviolet light transmittance as feedforward and the oxidation-reduction potential in front of a membrane as core feedback is constructed, the power of a medium-pressure ultraviolet lamp and the adding amount of the hydrogen peroxide are dynamically adjusted in a linkage mode, and the pollution treatment effect of the medium-pressure ultraviolet and the hydrogen peroxide is improved. The maximization of the advanced oxidation synergistic effect and the precise management and control of the membrane safety risk are realized, so that the technical effects of efficiently inhibiting microbial pollution, absolutely guaranteeing the safety of the reverse osmosis membrane, remarkably reducing the operation energy consumption and the medicine consumption and improving the water quality fluctuation resistance of the system are achieved.

An in-situ and in-flight microbial sterilization system for eliminating microbial contamination. The system comprises a housing having at least two openings and a passageway, the passageway configured to receive an object, and at least one pneumatic dust removal system, at least one heater and at least one non-ionizing radiation emitting device, the at least one pneumatic dust removal system. The heater and non-ionizing radiation emitting device are configured to sterilize an object within the passageway.

The application belongs to the technical field of electrochemical sensing, and particularly relates to an electrochemical sensing electrode with detection and anti-biofouling functions, a preparation method and application thereof. The electrochemical sensing electrode comprises a conductive substrate and a MOF-919 material loaded on the conductive substrate, and function mode switching is realized through external potential regulation. In the detection mode, a first working voltage is applied for nitrite oxidation detection; and a second working voltage is applied to release nitric oxide in situ by reducing nitrite to inhibit microbial adhesion on the electrode surface. The application does not need to additionally set an independent antibacterial layer or add an antibacterial agent, realizes the interface anti-microbial adhesion function while maintaining good electrochemical response performance of the electrode, and significantly improves the stability of long-term use in complex samples. The application provides a new technical path for anti-pollution design of an electrochemical sensing interface.

The utility model discloses a protein centrifugal extraction device, which belongs to the field of protein extraction equipment and comprises a shell, a rotating shaft is rotatably mounted at the bottom in the shell, a supporting plate is fixedly mounted at the top of the rotating shaft, a flexible pad is fixedly connected to the top of the supporting plate, and two vertical rods distributed at intervals are fixedly mounted on the supporting plate. Limiting rings are fixedly connected to the vertical rods correspondingly, and a driving mechanism is installed on the shell. A first container placed on the flexible pad is arranged in the shell, the upper end of the first container extends outwards, the upper end of the vertical rod penetrates through the upper end of the first container, the limiting ring is located below the upper end of the first container, and an annular frame is fixedly installed at the lower end of the first container. According to the protein centrifugal extraction device, the first container is limited in the vertical direction, the first container can be prevented from shaking up and down, the first container is prevented from being broken, and equipment is prevented from being damaged, so that the experiment safety is improved, biological pollution diffusion is avoided, and centrifugal accidents are eradicated.

The invention discloses an efficient offline cleaning method for reverse osmosis membrane microbial contamination, and belongs to the technical field of reverse osmosis membrane cleaning. The method comprises the following steps: firstly, carrying out cleaning pretreatment on a reverse osmosis membrane, then putting the reverse osmosis membrane into a cleaning water tank with nutrients for carbon source circulation, carrying out gas production fermentation in an anaerobic environment, strengthening biological membrane loosening in an aerobic-anaerobic environment, and finally, carrying out offline high-pressure cleaning, alkali washing, acid washing and flushing. The standard water yield recovery rate gt of the reverse osmosis membrane after cleaning is carried out by the method; the pressure difference increasing rate after cleaning is gt; 1.8 Pa / m < 2 > / h; the standard water yield recovery rate gt of the cleaned reverse osmosis membrane is determined; and after cleaning, the differential pressure increase rate is reduced to 1.4 Pa / m < 2 > / h or below. The method is more friendly to membrane cleaning and has wide applicability.

The invention discloses a membrane channel biological pollution multi-physical field simulation method based on physical information deep learning, which comprises the following steps: acquiring sampling data, and mapping the sampling data into a biological membrane morphology characterization field which is continuously distributed along with space coordinates; constructing a deep neural network model, taking the space coordinates of the membrane channel as input, taking multi-physical field state variables in the membrane channel as output, and establishing a mapping relation from the space coordinates to physical fields; a composite loss function driven by physical information is constructed, the composite loss function comprises a physical equation residual error used for constraining a physical field to meet a preset physical conservation law and a boundary condition residual error item used for constraining a boundary condition, and physical field distribution output by the model is made to conform to a physical evolution law in a membrane channel and biological membrane pollution characteristics at the same time; inputting space coordinates of a to-be-predicted area into the trained deep neural network model to obtain full-field physical quantity distribution information in the polluted membrane channel; the quantitative digital basis is provided for the anti-pollution bionic separation net.

Endotoxin production inhibition in a water system, or both biofouling inhibition and endotoxin production inhibition can be achieved. In a membrane treatment method or a biofouling inhibition method, a bonded halogen compound is caused to exist in a water system where gram-negative bacteria exist. In an endotoxin production inhibition method in a water system, a bonded halogen compound is caused to exist in the water system.

This invention discloses a long-term phosphorus removal method for wetlands that couples anti-pollution and rhizosphere activation; belonging to the field of constructed wetland water treatment technology, the method includes the following steps: constructing a vertical flow constructed wetland reactor and filling it with lanthanum-chitosan-modified zeolite packing material; initially introducing slightly polluted river or lake water, using the packing material to release alkaline substances to maintain a pH of 11.0–12.0, and rapidly fixing phosphorus through chemical precipitation; after the effluent pH drops to the normal range, emergent plants are planted, using low phosphorus stress to induce the roots to secrete organic acids, neutralizing residual alkalinity and dissolving insoluble phosphorus on the packing material surface, thus regenerating active sites; simultaneously, utilizing the positively charged microenvironment of chitosan quaternary ammonium salt on the packing material surface and the synergistic antibacterial mechanism of the lanthanum-loaded nanostructure, microbial attachment and extracellular polymer secretion are inhibited, preventing bioclogging. This invention achieves efficient and long-term phosphorus removal from slightly polluted river or lake water through the synergistic effect of high-alkalinity start-up, rhizosphere activation, and anti-biofouling, extending the system's operating cycle.

Described herein are electrochemical capacitive biosensors, methods of making same, and methods of using same. The electrochemical capacitive biosensors are especially useful for detecting pathogens, including viruses, bacteria, and allergens, in aerosols and complex biological media.

An adaptive water purification device consisting of a variety of sensors for detecting physical, chemical and biological contaminants in the incoming water, a control unit with artificial intelligence for processing the sensor data and a network of controllable valves that direct the water flow through one or more filtration modules selected based on the detected contaminant profiles.

The present application relates to a kind of reverse osmosis membrane pollution control method based on green biological scale inhibition, especially suitable for reverse osmosis membrane pollution treatment in industrial wastewater zero discharge system.The method comprises: regulating the composition of influent organic components by sand filter pretreatment unit, using the microbial community and its extracellular polymeric substance naturally enriched in sand filter process, without additional bacteria or chemical scale inhibitor, can directly interfere with the nucleation and crystallization process of inorganic scale on membrane surface, to form loose reversible pollution layer structure.The method effectively reduces the scale rate of inorganic salts such as calcium carbonate, inhibits membrane surface biological pollution, delays the densification of pollution layer, improves membrane flux retention rate, prolongs membrane operation cycle, reduces cleaning frequency.Compared with the existing conventional physical or chemical pretreatment method, the present application makes full use of the natural scale inhibition effect of the ecological system in sand filter unit, has the advantages of low operating cost, environmental friendly, strong adaptability and the like.

The utility model relates to the technical field of marine ecological monitoring, and discloses a camera structure of a self-cleaning water area monitoring buoy, which comprises a top plate, the bottom of the top plate is fixedly connected with a cylinder, the lower side of the outside of the cylinder is fixedly connected with a reducing pipe, the lower side of the outside of the reducing pipe is fixedly connected with a mounting sleeve, and the mounting sleeve is fixedly connected with a camera. A connecting frame is connected to the interior of the mounting sleeve in a clamped mode, cleaning cotton is fixedly connected to the interior of the connecting frame, a handle is fixedly connected to one side of the connecting frame, and through holes are formed in the two sides of the interior of the mounting sleeve. According to the device, the camera body is cleaned twice, repeated energy consumption and complex control are avoided, the working efficiency of the device is remarkably improved, the device can be conveniently disassembled and replaced, the cleaning efficiency of the camera body is improved, mechanisms in the device are protected, growth of algae and plankton is restrained, and the device is suitable for popularization and application. The risk of equipment failure caused by biological pollution is reduced, and the service life of the equipment is prolonged.

The invention discloses a paving method of a floor. The paving method comprises a preparation step, wherein the container is placed above the ground groove, and the lifting device arranged in the ground groove ascends to the interior of the container from the gap between the bottom cross beams. And a gluing step: butyl rubber is arranged on the contact surfaces of the doorsill, the front sill and the bottom side beam. A plate paving step: a plate paving device grabs the floor located at the paving station and enables the floor to incline relative to the horizontal direction, the plate paving device moves in the longitudinal direction of the container so as to convey the floor into the container from a container door of the container, the plate paving device places the floor on a lifting device, and the lifting device descends to a ground groove so as to lift the floor; the floor is laid to the chassis. According to the paving method, the paving method is suitable for paving the whole floor, so that the container can adopt the whole floor, and biological pollution caused by the fact that pests are hidden in splicing gaps is avoided.