37 results about "Contamination control" patented technology

This invention provides a photovoltaic-powered microbial fuel cell constructed wetland system, relating to the field of water pollution control. The system consists of a photovoltaic power supply module, a pulse modulation unit, a mode switching unit, a microbial fuel cell constructed wetland body, an auxiliary anode module, and an electrically isolated stimulation electrode pair. Through photovoltaic power supply and low duty cycle intermittent constant current pulse modulation, it can maintain stable operation for more than 72 hours under no-light conditions. Relying on the time-sharing pulse output of the mode switching unit, electrochemical oxidation of recalcitrant organic matter is achieved through the auxiliary anode. The electroisolated electrode pair stimulates the metabolism of electrogenic bacteria with a non-contact alternating electric field, solving the problems of unstable power supply and difficulty in balancing oxidation efficiency and bacterial activity in off-grid scenarios, thus improving wastewater treatment efficiency and long-term operational stability of the system.

This invention relates to the field of flue gas pollution control technology in coal-fired power plants, and discloses a method for total pollutant emission reduction in an environmental protection island based on morphological transformation and residual compensation. The method includes: acquiring real-time operating data of a smart environmental protection island in a coal-fired power plant, generating a time-series feature vector, and setting inlet boundary conditions; constructing a pollutant morphological transformation mechanism model for each environmental protection subsystem, inputting relevant data and inlet boundary conditions, and calculating the theoretical baseline concentration of pollutants; using an LSTM as an error-compensated prediction model, after training with historical data, inputting the current operating condition time-series feature vector to obtain the concentration prediction residual value, obtaining the deviation between the historical training conditions and the current operating conditions, calculating the confidence factor, and generating a mixed pollutant prediction concentration; finally, using ammonia injection flow rate and other factors as optimization variables, setting constraints, and constructing an objective function with the lowest total cost to obtain the optimal control parameter set, thereby achieving optimized control and pollutant emission reduction of the environmental protection subsystem. This invention significantly improves the pollutant emission reduction effect.

The application provides a carbon source intelligent screening method and device for strengthening microbial degradation of emerging pollutants, and belongs to the technical field of pollution control. The method adopts a carbon source screening model constructed and trained based on coupling of a large language model and machine learning, intelligently screens based on gene characteristics of microorganisms in a microbial community and candidate carbon source characteristics to obtain an advantage specific carbon source of functional microorganisms, and can screen the advantage specific carbon source for promoting growth of the functional microorganisms, so that the functional microorganisms are directionally enriched in the microbial community, the in-situ emerging pollutant degradation capacity of the microbial community is improved, and the treatment effect of the emerging pollutants is further improved.

The application relates to the field of urban water environment and pollution control technology, and discloses a new pollutant simulation method for urban river network, which comprises the following steps: obtaining hydrographic data of a target river network region, collecting concentration measured data of a target pollutant in water and sediments, constructing a coupled hydrology-pollutant transmission model, setting initial parameters of the model, and outputting the spatial and temporal distribution of the pollutant by running the model; emergency simulation of a sudden pollution event, wherein the influence range is output within 10 minutes after inputting accident discharge parameters; long-term pollution trend prediction, which supports scenario analysis on a 5-10 year scale. A city drainage correction term is introduced by improving the Saint-Venant equation set, and the parameters are optimized in combination with measured data, so that the accuracy of hydrological simulation of the urban river network is significantly improved; compared with a traditional method, the Nash efficiency coefficient is improved from 0.68 to 0.79, so that the simulation of the water dynamics of the urban river network is more accurate, and a more reliable basis is provided for the design of the urban drainage system and flood warning.

The present invention provides a control method for sidewall contamination of an MRAM magnetic tunnel. In the control method, there is no need to additionally coat an insulation protection layer on the sidewall of an MTJ layer, but a unique funnel-shaped trench is formed during the etching process; the funnel-shaped trench comprises a first area away from a plane where a substrate is located and a second area adjacent to the plane where the substrate is located; the size of the first area in a first direction gradually increases, and the size of the second area in the first direction does not change; and in removing metal contamination on the bottom of the funnel-shaped trench, the funnel-shaped trench can prevent the metal contamination from being attached to the sidewall of the MTJ layer, so as to improve the apparatus performance of an MRAM.

The application discloses a kind of overflow pollution processing method of urban drainage system, it is applicable to the overflow pollution generated in the combined system interception overflow drainage outlet of urban drainage system, split-flow system interception overflow drainage outlet, by the integration of the data that can be collected such as per capita daily domestic water consumption, rainfall, raw sewage concentration, construct quantitative model, provide a kind of overflow pollution discharge theoretical concentration calculation method considering sewage collection rate, calculate the sewage quantity and rainwater quantity generated in unit time unit area in theory, and introduce the concept of actual sewage yield of pipe network, respectively according to the dischargeable concentration of rainwater and sewage Weighted average obtains the theoretical concentration of rainwater and sewage mixture, to determine the reasonable range of overflow pollution discharge concentration based on this, whether overflow pollution discharge can be quantified to reach standard, provide more reasonable basis for overflow pollution control of urban drainage system.

This application relates to a method and its application for reducing nitrate nitrogen to ammonia nitrogen in wastewater using a dual-bacterial inoculant. The method involves separately expanding, washing, and resuspending electron-donating bacteria and dissimilatory nitrate-reducing ammonium-producing bacteria, then mixing them in a co-culture medium to form a dual-bacterial inoculant; introducing the co-culture medium containing the dual-bacterial inoculant into the wastewater to be treated, and reducing nitrate nitrogen to ammonia nitrogen in the wastewater under anaerobic conditions. This method can reduce nitrate nitrogen in wastewater into a high-energy-density energy storage substance, and can also alleviate the problems of low utilization rate of ammonium nitrogen fertilizer and non-point source pollution, which is of great value for nitrogen pollution control and green sustainable agricultural development.

This invention discloses a modified CaFe-LDH composite material and its application in Cd removal. 2+ With Cr 6+ The application of this material involves the fields of environmental functional materials and pollution remediation technology. The preparation method of the modified CaFe-LDH composite material includes the following steps: mixing calcium nitrate or its hydrate, ferric nitrate or its hydrate, and water; stirring and reacting the mixture; allowing it to stand for aging; and then drying it to obtain CaFe-NO3. ‑ -LDH; utilizing Mo3S 13 2‑ The solution for CaFe-NO3 ‑ Ion exchange with -LDH yields CaFe-Mo3S 13 2‑ -LDH refers to the modified CaFe-LDH composite material. The modified CaFe-LDH composite material of this invention possesses adsorption, reduction, and passivation functions simultaneously, enabling multi-stage pollution control in water purification and in-situ soil remediation.

A system for simulating pollutant transportation includes an import module, an analysis module, a simulation setting module and a simulation output module. The system is used to provide accurate simulation of pollutant transportation by adapting to different types of pollutants and environmental conditions, and is convenient for more accurate and timely decision-making in pollution control and environmental management. A method for simulating pollutant transportation is realized through elements of the system for simulating pollutant transportation.

This invention discloses a method for the synergistic resource utilization of "candidate organisms of Rhubarb and black soldier fly" mediated by in-situ biomass resource utilization of water hyacinth, belonging to the field of water pollution control engineering technology. The method includes the following steps: harvesting water hyacinth from eutrophic water bodies, performing in-situ biomass resource utilization, crushing, composting, and maturing the biomass to obtain compost products; using the compost products as a cultivation substrate to induce or cultivate candidate organisms of Rhubarb and obtain biomass; pulverizing and conditioning the biomass to obtain a feeding substrate, and feeding the feeding substrate to black soldier fly larvae to achieve biotransformation, separating the larvae and their excrement residue; and returning the compost liquid to the cultivation process for humidity control. This invention solves the three major pain points of existing technologies: secondary pollution, equipment dependence, and high energy consumption with low output value, realizing the full-chain transformation of water hyacinth from "invasive pollutant" to "protein feed resource + organic fertilizer raw material".

This invention discloses a method for preparing a PEI-anchored KNN / PVDF-TrFE piezoelectric membrane, belonging to the field of water treatment membrane materials and membrane fouling control technology. Addressing the challenges of existing piezoelectric membranes in achieving both high permeability and effective piezoelectric response, as well as the severe membrane fouling in membrane bioreactors and the high energy consumption and potential damage to membrane materials associated with traditional fouling control methods, this invention uses P(VDF-TrFE) as the membrane matrix, lead-free piezoelectric ceramic potassium sodium niobate (KNN) as the functional filler, and polyethyleneimine (PEI) as the interface anchoring agent. A solvent-free / temperature-induced phase separation method is employed to prepare the composite piezoelectric membrane. After optimization using response surface methodology, the resulting membrane achieves a pure water flux of 2180 L / m² / h and a piezoelectric coefficient d₃₃ of 30.2 pC / N under optimal conditions. Driven by a 10 V, 50 Hz AC electric field, the composite membrane exhibits a localized inverse piezoelectric response at the pore edges, reducing the fouling layer thickness by approximately 30% and increasing the steady-state flux by approximately 184%, demonstrating excellent in-situ antifouling performance. This method has a simple preparation process and uses environmentally friendly materials, which can provide a functional membrane material basis for MBR membrane fouling control in municipal and industrial wastewater.

The application discloses a kind of microplastic release amount prediction methods based on mulch aging characteristics and soil physicochemical properties, belong to environmental science and pollution control technical field.The method is by collecting mulch material type, oxygen-carbon ratio, carbon content, haze, light transmittance and soil pH, conductivity, total iron, total manganese, organic matter and so on multiple input variables, with microplastic release abundance as output variable, the nonlinear mapping relationship between input and output is established using random forest regression model, realize the high-precision prediction of microplastic release abundance.The test set is verified, and the model determination coefficient R² can reach more than 0.86.The application can also identify key control factors through feature importance and SHAP analysis, has the advantages of high prediction accuracy, strong interpretability, can handle multi-factor nonlinear coupling relationship, can provide effective tools for agricultural mulch source microplastic formation end evaluation, parameter extraction and environmental management.

The present application relates to a method for separating arsenic and antimony based on gas phase oxidant, belonging to the field of nonferrous metallurgy and pollution control technology. The arsenic and antimony containing material is added into a reaction furnace, heated to a temperature of 923-1173K under a protective gas atmosphere, so that the arsenic and antimony containing material is melted or softened and forms a melt phase mainly containing antimony; under a temperature of 923-1173K, a gas phase oxidant is introduced into the reaction furnace to selectively oxidize arsenic to form volatile arsenic oxide and volatilize from the melt to obtain arsenic containing flue gas, and antimony remains in metallic state and is enriched in the melt phase to obtain antimony enrichment melt after arsenic removal; the arsenic containing flue gas is cooled to a temperature below 473K through heat exchange, and condensed dust or particulate matter is collected through a dust removal device to obtain an arsenic oxide enrichment phase; the introduction of the gas phase oxidant into the reaction furnace is stopped and a protective gas is introduced for purging, and the antimony enrichment melt after arsenic removal is cast to obtain antimony product. The present application has the advantages of short process, low reagent consumption, low energy consumption, controllable arsenic form, high grade antimony product and suitability for industrial continuous production, etc.

The application belongs to the technical field of material distribution control, and relates to a material distribution control system based on artificial intelligence, which comprises an instruction analysis and initialization module, a residual acoustic detection module, a residual intelligent classification module, a self-adaptive cleaning strategy module, an electromagnetic cleaning execution module, a gas cleaning and resetting module and a suspended force field conveying module. The instruction analysis and initialization module receives production instructions and drives an electromagnetic coil matrix to form a fluid quasi-suspension force field in a pipeline. The suspended force field conveying module utilizes the force field to convey target materials, and after completion, the pipeline enters a standby state. The residual acoustic detection module emits and receives ultrasonic signals to generate an acoustic characteristic spectrum. The residual intelligent classification module identifies the morphology of residual materials through matching calculation. The self-adaptive cleaning strategy module calls a cleaning paradigm according to the morphology and generates a physical cleaning instruction set. The electromagnetic cleaning execution module drives the interface film to generate corresponding cleaning actions to separate the residual materials. The gas cleaning and resetting module restores the pipeline to a clean and ready state. The application solves the problems of lack of pollution control means in the material distribution process, low cleaning efficiency, uncontrollable effect and poor production continuity.

The application discloses a harmless treatment and resource utilization method of yellow phosphorus slag solid waste and phosphogypsum leachate, relates to the technical field of industrial solid waste treatment and resource utilization, and comprises the following steps: mixing phosphogypsum and ultrapure water to prepare PG suspension liquid, adding ground yellow phosphorus slag for collaborative treatment, and carrying out solid-liquid separation to obtain PG-PS leachate and PG-PS precipitate; adding an additive to the PG-PS leachate to remove harmful components of phosphorus and fluorine; and mixing the PG-PS precipitate with biochar, red mud, carbide slag and cement according to a proportioning ratio, adding water, pouring and curing to prepare modified PG filling material. The application realizes efficient removal of phosphorus and fluorine in the leachate, the water quality meets the discharge standard, the obtained precipitate is resourcefully utilized, the prepared filling material has good environmental safety and engineering applicability, the application uses industrial solid waste as raw material, has simple process and low cost, realizes pollution control and dual utilization of phosphogypsum and yellow phosphorus slag, and has good ecological benefits and application value.

This invention relates to the field of resource utilization and pollution control technology for steel solid waste, specifically disclosing a method for deep thallium removal at multiple nodes throughout the wet process of a steel solid waste treatment plant. This method incorporates a three-stage deep thallium removal process into the entire recovery process of potassium, sodium, and zinc: in the potassium and sodium recovery line, the first stage of deep thallium removal is performed on the purified potassium and sodium rinsing solution using a Na2S+Na2CO3 co-precipitation method; in the zinc recovery line, the second stage of deep thallium removal is performed on the neutral leachate after iron removal using an ultrasonic-enhanced zinc powder replacement method; and in the deeply purified zinc sulfate solution section, a third stage of guaranteed deep thallium removal is performed using zinc-based composite powder. This invention achieves the graded and efficient removal of trace heavy metal thallium by applying the most suitable thallium removal technology at different process nodes, ensuring the high purity of potassium and sodium salts and nano-zinc oxide products, and preventing the cyclic enrichment of thallium within the system.

This invention discloses a cadmium protection method and system based on ensemble learning, relating to the field of pollution control technology. It includes basic information acquisition: obtaining past cadmium protection information. The invention first establishes cadmium pollution information corresponding to basic information through information decomposition. The degree of cadmium pollution is determined by the position of the basic information within the cadmium pollution information. Based on the degree of cadmium pollution, a corresponding reference library is selected and matched with the basic information to obtain basic protection information. A redundant protection generation method combines dietary exposure variables with environmental exposure variables. An ensemble machine learning algorithm is used to accurately predict and collaboratively optimize the cadmium load in the body, achieving integrated closed-loop management of "pollution monitoring - risk identification - intelligent optimization of intervention strategies - quantification of effects," improving prevention and control efficiency. By integrating environmental monitoring, exposure assessment, and collaborative intervention, a comprehensive protection approach is adopted to achieve full-chain, intelligent, and collaborative prevention and control of cadmium exposure risk.

This invention relates to the field of aquifer seepage simulation and pollution control testing technology in mining areas, and particularly to a simulation system and method for the migration and remediation of contaminated groundwater in coal-uranium superposition areas. The technical solution includes a laying mechanism, a leaching and extraction mechanism, a disturbance mechanism, an integrated measurement and control mechanism, a groundwater migration mechanism, and a pollution purification mechanism. This invention achieves accurate reconstruction of the complex aquifer structure of coal-uranium superposition and synchronous application of mining-leaching coupled conditions. It utilizes resistivity tomography and a multi-parameter sensor network to achieve online monitoring, image visualization, and closed-loop control of the seepage-contamination process. Through a coiled migration pipeline, a post-mining migration trench, and a seepage reduction barrier-reduction solidification unit, it simulates the entire process from pollution formation, far-field migration, post-mining redistribution to end-of-pipe treatment. This system has high integration, strong controllability, and good repeatability, and can systematically reveal the migration mechanism and remediation response law of contaminated groundwater.

The application discloses a kind of transboundary pollution dynamic responsibility definition methods suitable for large-scale river network area, it is related to transboundary water environment management and pollution control technical field.This method estimates and identifies the responsibility definition range that has significant influence on transboundary section water quality by one-dimensional steady-state water quality model in combination with pollution influence weight along the way, on this basis, according to each local control unit division or control section distribution;Combining the river network distribution and hydrodynamic dynamic monitoring data in each space unit, calculate the pollutant carrying capacity of river network area that can reflect the characteristics of spatio-temporal dynamic change;At the same time, combined with river network area sewage distribution and dynamic monitoring, calculation, determine the dynamic over-standard discharge pollution load of each space unit in the definition range;Finally, combined with the calculation of one-dimensional steady-state water quality model of transboundary river, determine the pollution transport process influence coefficient of each space unit in large-scale river network area to carry out dynamic correction calculation, to realize transboundary pollution management and control dynamic responsibility definition.

This invention relates to the field of contamination control technology for space optical payloads, specifically providing an in-situ molecular cleaning and particulate dust removal system for space optical payloads. The system includes an electrode array and a multi-mode power controller. The electrode array comprises at least two electrode groups with electrodes in different groups interleaved. The multi-mode power controller is configured to: in a first mode, provide direct current to the electrode array to remove organic molecular contaminants from the surface of the optical payload through high-energy ion bombardment; and in a second mode, provide multiphase alternating current with a phase difference to different electrode groups in the electrode array to push particulate contaminants away from the optical payload surface through a traveling wave electric field. This invention fundamentally solves the problem of combined oil film and particulate contamination that traditional technologies cannot handle.

The application relates to the technical field of water and soil pollution control, and discloses an iron-nitrogen co-doped biochar for Cd-As composite pollution remediation, a preparation method and application, which comprises the following raw materials: biomass material, potassium ferrate and melamine. The iron-nitrogen co-doped biochar can realize the synergistic and efficient removal of Cd(II) and As(III), and the adsorption capacity of the biochar for As(III) in a Cd-As composite pollution system reaches 28.96 mg / g, which is 5.18 times higher than that in a single As(III) pollution system.

A method is performed for controlling contamination in a light source. The method includes: obtaining a reference image of an optical element in the light source; obtaining a real-time image of the optical element; comparing the real-time image with the reference image to determine a contamination metric associated with the optical element; and triggering an operation in the light source based on the determined contamination metric to thereby mitigate contamination at the optical element.

The application relates to the technical field of wastewater discharge treatment, and particularly discloses a wastewater discharge treatment equipment for water pollution control, which comprises a supporting base, a sewage treatment device is fixedly connected to the top of the supporting base, a solid waste water tank is communicated with the bottom of the sewage treatment device through a pipeline, an iron removal device is fixedly connected to one side of the sewage treatment device, and an ultraviolet sterilization device is fixedly connected to the side, away from the sewage treatment device, of the iron removal device. The wastewater discharge treatment equipment for water pollution control preliminarily filters water bodies through the sewage treatment device, separates solid matters and suspended matters floating on the water surface according to the characteristics of impurities, processes the solid matters and the suspended matters, adsorbs magnetic substances in the water bodies through the iron removal device, and finally purifies and filters the water bodies through the ultraviolet sterilization device according to the change of the position of the ultraviolet lamp, so that efficient purification of water body pollution is realized.

A kind of total phosphorus simulation method of basin based on new aujiang three water source components belongs to the technical field of basin hydrology and water quality coupling simulation. First, collect the basic data of flood event in the study basin, and uniformly arrange and pretreat, obtain the flood event data set. Secondly, the new aujiang model of flood period hydrological simulation is constructed, the surface runoff, the soil water runoff, the groundwater runoff and the reservoir discharge after river evolution are calculated, and the three water source components and the total flow of the study section are obtained. Thirdly, the total phosphorus simulation model of flood period is constructed, the total phosphorus load of the study section is obtained, and the total phosphorus concentration is calculated combined with the section flow. Finally, the new aujiang model parameters and the total phosphorus simulation model parameters are calibrated and verified. The present application can realize the simulation of total phosphorus concentration in the flood event process of small and medium-sized basins affected by the regulation of upstream reservoir, provide technical support for the evaluation of basin water environment, pollution load analysis, identification of reservoir regulation influence and pollution control measures.

This invention discloses a method for tracing the source of pollution in stormwater pipe networks by combining three-dimensional fluorescence fingerprinting and graph neural networks, relating to the field of urban stormwater system pollution control technology. The method collects spectral data of the pipe network by deploying a fluorescence spectral sensor array to construct an incrementally updatable fluorescence database; establishes a graph model based on the pipe network topology and hydraulic parameters, and embeds the spatiotemporal features of nodes / pipe segments using a GNN; extracts the spatial features and temporal series correlations of the spectra using a hybrid CNN and LSTM model; calculates the probability distribution of pollution sources through database matching and model inference, and outputs the pollution source type, location, and confidence assessment of the mixed connection path based on the Bayesian inference optimization results. The method introduces anomaly sample identification and multi-source evidence fusion to maintain robustness under complex operating conditions; the results are presented in a tiered alarm and visualization report. This invention constructs a perception-analysis-response closed-loop system to achieve rapid and accurate source tracing of sudden mixed connection pollution.

The invention relates to a method for cleaning items, especially containers for transporting and / or storing wafers or reticles such as FOUPs or reticle pods, in a fab environment, comprising the steps of identification of a plurality of critical contaminants amongst the total contamination, especially in in a closed (mini) environment such as the interior of a container, after identifying the critical contaminants, choosing and / or optimizing a cleaning process with a view to suppressing at least one of the plurality of critical contaminants, especially until a predetermined first threshold level of the at least one of the critical contaminants has been reached, and after supressing the at least one of the plurality of the critical contaminants, reducing the overall contamination, especially comprising AMCs, VoCs etc, especially until a predetermined second threshold level of the overall contamination has been reached.

The application discloses a seasonal river pollution control engineering effect evaluation and environmental protection technology popularization service system and relates to the technical field of environmental monitoring; the system comprises the following modules: a matter-element extension evaluation module, which determines the comprehensive evaluation grade of the pollution control engineering according to a matter-element correlation matrix; a projection pursuit weak link identification module, which generates an improvement priority sequence by sorting the projection values of each weak link index along the optimal projection direction vector from large to small; and a multi-objective optimization popularization module, which is used for setting candidate environmental protection technologies for each weak link index according to the improvement priority sequence and screening a final environmental protection technology popularization service scheme from a Pareto optimal solution set. The application realizes a complete decision link from quantitative evaluation to accurate positioning of weak links and then to multi-objective balanced optimization of a popularized technology scheme, and overcomes the limitation of traditional methods that can only output a comprehensive evaluation grade and cannot identify specific shortcomings and improvement priorities.

This invention discloses a modular device and its application method for in-situ suppression of sediment disturbance in rivers and lakes, relating to the field of aquatic ecological environment. The device includes a grid structure module and a flexible connection mechanism: the grid structure module consists of primary / secondary keel grid strips connected by interlocking slots, with outer edge sealing strips; the flexible connection mechanism engages with a spherical fixing element via a fixing slot with a hooked arc-shaped elastic body and an internal spring, allowing the module to deflect horizontally by ±5° and move vertically by ±3cm; the bottom of the module is equipped with a retractable support to adapt to different sediment thicknesses; the application method includes surveying and mapping, module calculation, assembly and deployment, and maintenance. This invention suppresses sediment resuspension by physically fixing sediments and mitigating water flow disturbance, offering advantages such as low cost, simple construction, and eco-friendliness, making it suitable for river and lake sediment pollution control and ecological restoration.

A lithographic patterning device contamination control system comprising a support structure configured to support a patterning device, and an electron beam source configured to emit a beam of electrons such that at least part of the beam is incident on a patterned face of a patterning device supported by the support structure during EUV exposure.