263 results about "Membrane fouling" patented technology

The invention belongs to the technical field of sewage treatment and membrane separation, and provides an in-situ nondestructive membrane pollution detection system and method based on an ultrasonic transmission signal, and the system comprises an ultrasonic excitation module which is used for generating a sine wave excitation signal which penetrates through a membrane body to excite the ultrasonic transmission signal for pollution detection; the signal processing module is used for continuously collecting and preprocessing ultrasonic transmission signals of the clean membrane body and the membrane bodies with different pollution degrees, extracting ultrasonic transmission signal characteristics under different pollution degrees, and establishing a pollution thickness-signal characteristic mapping model; wherein the ultrasonic transmission signal features comprise a time-frequency domain energy gravity center feature and a frequency attenuation spectrum slope feature; and the pollution detection module is used for judging the pollution stage of the membrane body to be detected based on the pollution thickness-signal feature mapping model, and completing in-situ nondestructive membrane pollution detection. According to the technical scheme, the sludge pollution state in the ceramic membrane and flat membrane filtering process can be monitored in real time, and early warning and pollution dynamic tracking are achieved.

According to the efficient water treatment system based on the reverse osmosis membrane and the control method provided by the invention, gradient anti-pollution membrane arrangement and reconfigurable intelligent waterway design are creatively combined, so that a foundation is laid for high-flux and low-pollution operation from a physical structure; meanwhile, a full-closed-loop intelligent control system is constructed, and by fusing fuzzy logic, an optimization algorithm and a neural network prediction model, the system can integrate multi-dimensional information such as inlet water quality, membrane pressure difference and water yield, judge pollution risks in real time and adaptively and seamlessly switch among a high recovery mode, a segmented flushing mode and a prediction cleaning mode, so that the system is high in recovery efficiency and high in reliability. Meanwhile, parameters such as pump frequency and valves are dynamically optimized to find an optimal balance point of recovery rate and energy consumption; according to the invention, the recovery rate can be stably improved, the membrane pollution rate is greatly reduced, the chemical cleaning period and the service life of the membrane element are prolonged, and finally, the comprehensive operation and maintenance cost of the system is remarkably reduced while the water treatment efficiency and the water quality safety are improved.

The invention relates to the field of direct drinking water of a fusion calculation model, and discloses a double-membrane mixing direct drinking water system and an operation method.The method comprises the steps that online data of a water supply end and a water quality monitoring end are collected for cleaning and time alignment, and a basic working condition data set is formed; the method comprises the following steps: establishing an operation characteristic model comprising water demand prediction, raw water quality prediction and membrane flux characteristic sub-models, calculating double-membrane target water yield and water quality indexes based on the model to generate a control parameter set, evaluating membrane pollution to generate an online cleaning task queue, performing joint simulation to generate a pressure stability control instruction set, and dynamically correcting the model. The conversion from passive response to active pre-judgment of the double-membrane mixing direct drinking water system is realized, and the operation stability, the water quality guarantee capability and the water-saving and energy-saving effects are improved.

The invention relates to the technical field of data processing, and discloses an automatic control method and system for wastewater desalination treatment based on the Internet of Things. The method comprises the following steps: acquiring a membrane surface image, an interface potential, an infrared spectrum, a transmembrane pressure difference, a feeding flow rate and a flocculation image; calculating a salt gradient attention feature vector according to the salt concentration difference value and the Beckey number; inputting the multi-modal data into a membrane pollution time sequence memory network to obtain a pollution development rate and a flocculant adding proportion; extracting a floc particle size parameter to obtain a flocculation effect score; and constructing a multi-objective function optimization solution to obtain a control instruction. The salt gradient attention mechanism and the membrane pollution time sequence memory network are introduced, and visual image recognition and multi-modal data fusion are combined, so that the problems of inaccurate membrane pollution state evaluation, low intelligent level of a control algorithm and insufficient multi-target collaborative optimization capability in the prior art are solved; the automation level and the treatment efficiency of wastewater desalination treatment are improved.

The invention discloses a membrane filtration sewage treatment system based on fine control, relates to the technical field of sewage treatment, and solves the technical problems of delayed response to water quality and water quantity fluctuation and extensive biochemical reaction control caused by water inlet load impact in an existing sewage treatment system. The system comprises an inflow water pretreatment module used for predicting inflow water quality in real time by using a water quality prediction model based on a neural network, and carrying out water quantity balance and water quality adjustment on inflow water according to a prediction result to obtain a first water body; the biochemical reaction module is used for cooperatively controlling external carbon source addition, nitrification liquid backflow and aeration intensity in the biological reaction process of the first water body by utilizing a multivariable model predictive control method to obtain a second water body after biochemical reaction; and the deep purification module is used for carrying out solid-liquid separation and deep purification on the second water body to obtain an effluent water body, and triggering cleaning and maintenance operation of the membrane based on a prediction result of the membrane pollution characteristics.

The invention discloses a membrane bioreactor membrane pollution prediction method and system, and relates to the technical field of pollution detection. The method comprises the following steps: setting a frequency detection strategy, and connecting a membrane bioreactor to obtain a membrane feedback signal based on the frequency detection strategy; performing feedback signal fluctuation time sequence characteristic analysis based on the membrane feedback signal to obtain a feedback signal characteristic; the feedback signal features are combined with reactor operation parameters to be imported into a mechanism hybrid prediction model, mechanism constraint is carried out through a mechanism constraint layer according to the feedback signal features, data analysis is carried out on time series data features on the basis of the mechanism constraint through a data driving prediction layer, and a membrane state prediction result is obtained; and performing membrane pollution state analysis and progress prediction according to the membrane state prediction result, and generating a membrane pollution prediction data chain. The technical problems that in the prior art, membrane pollution prediction depends on an empirical threshold, so that recognition lags and precision is insufficient are solved, and the technical effect of improving membrane pollution prediction accuracy and real-time performance is achieved.

The invention provides an intelligent maintenance cleaning device for nanofiltration membrane pollution control and a method thereof, and solves the problems of low maintenance cleaning efficiency, poor adaptability of cleaning parameters and pollution conditions and frequent chemical cleaning of an existing nanofiltration system. Belongs to the technical field of membrane pollution control. According to the invention, the filtering system, the cleaning system and the intelligent decision-making module are integrally designed, so that the closed-loop control of the whole process of real-time monitoring, pollution identification, intelligent decision-making and automatic cleaning of the running state of the nanofiltration membrane is realized. The cleaning effect gating memory neural network model is used as a membrane pollution prediction model, membrane pollution can be accurately predicted, and key cleaning nodes can be identified. The optimal membrane cleaning parameters are generated by adopting a non-dominated sorting genetic algorithm, the usage amount of chemical agents and the cleaning cost are reduced, and the membrane pollution control effect is improved. The invention is applicable to the field of drinking water treatment.

The invention relates to a water treatment and membrane separation technology, and provides an integrated catalytic separation membrane, a preparation method thereof, and a water treatment method and system. According to the membrane, polyvinylidene fluoride is used as a continuous phase to form a porous matrix, and cerium dioxide is embedded and fixed in a mode of uniform dispersion in a membrane body in a phase inversion membrane forming process; in the presence of illumination and peroxysulfate, active species are generated through in-situ activation on a membrane-water interface, and membrane separation is completed synchronously. The water treatment method comprises the following steps: adding peroxymonosulfate or peroxydisulfate into a water body to be treated, and filtering through the membrane under illumination; the photothermal effect generated by organic matter degradation intermediates in operation inhibits membrane pollution and maintains flux. According to the invention, short-range coupling of active sites and mass transfer channels is realized, the medicament and energy utilization rate is improved, the coating stripping and metal dissolution risk is reduced, and the method is suitable for drinking water pretreatment, reclaimed water deep treatment and treatment of water containing natural organic matters / humic acid.

The invention relates to the field of separation and purification, in particular to an anti-pollution nanofiltration membrane for magnesium-lithium separation, the anti-pollution nanofiltration membrane comprises a base membrane and a functional layer, and the functional layer is prepared from the following raw materials in parts by weight: a water phase: 1.5-2.5 parts of piperazine, 0.1-1 part of lauryl sodium sulfate, 0.5-2 parts of glycerol, 1-2 parts of triethylamine, 0.6-2 parts of ionic polymer, and the balance of water for supplementing the total amount of the water phase to 100 parts; the ionic polymer comprises at least one of sulfobetaine metacrylic acid ester, sulfobetaine and carboxyl betaine metacrylic acid ester; and an oil phase: 0.1-1 part of trimesoyl chloride, and the total amount of the oil phase is supplemented to 100 parts by normal hexane or isoparaffin. The ionic polymer is added, and a compact hydration layer is formed on the surface of the membrane by using a betaine group of the ionic polymer, so that the membrane pollution probability is reduced, and common inorganic scaling and organic pollution in the high-salt brine are remarkably inhibited; in addition, the ionic polymer enables the membrane surface to have strong negative electricity, and the magnesium ion rejection rate is improved; and the ionic polymer can also reduce the lithium ion transmission energy barrier and reduce the rejection rate.

The application relates to the technical field of data processing, and discloses a wastewater desalination treatment automatic control method and system based on an Internet of Things. The method comprises the following steps: collecting a membrane surface image, an interfacial potential, an infrared spectrum, a transmembrane pressure difference, a feed flow and a flocculation image; calculating a salt gradient attention feature vector according to a salt concentration difference value and a Berkeley number; inputting the membrane pollution time sequence memory network combined with multi-modal data to obtain a pollution development rate and a flocculant dosage ratio; extracting a floc particle size parameter to obtain a flocculation effect score; and constructing a multi-objective function optimization solution to obtain a control instruction. By introducing a salt gradient attention mechanism and a membrane pollution time sequence memory network, combining visual image recognition and multi-modal data fusion, the problems of inaccurate membrane pollution state evaluation, low intelligent level of a control algorithm and insufficient multi-target collaborative optimization capability in the prior art are solved, and the automation level and processing efficiency of wastewater desalination treatment are improved.

The invention relates to an enhanced coagulative precipitation and ceramic membrane integrated high-hardness removal device and method. The device comprises a water inlet detection tank, a first-stage pH reaction tank, a first-stage flocculation tank, a first-stage sedimentation tank, a second-stage pH reaction tank, a second-stage coagulation tank, a second-stage flocculation tank, a second-stage sedimentation tank, a membrane tank, a clean water tank and a PID (Proportion Integration Differentiation) control system which are sequentially communicated in series along a water flow direction, the agent dosage is obviously reduced, the precipitation efficiency is greatly improved, the sludge treatment is more thorough, the membrane pollution is effectively controlled, and the treatment effect is stable and reliable.

The invention belongs to the technical field of water treatment, discloses a process and a method for removing DOM in initial rainwater, and aims to solve the problems that DOM components in runoff rainwater are complex, the removal rate of a traditional process is low, membrane pollution is easily caused, a powder catalyst is difficult to recover and the like. The method comprises the following steps: introducing rainwater into a reactor with a ceramic membrane, and directly adding free-state GAC, CuO and PS; static circulation is firstly carried out at a high shear rotating speed, and GAC and CuO are used for synergistically activating PS to generate a large number of free radicals for in-situ degradation of DOM; and then solid-liquid separation is carried out through suction of a ceramic membrane. Efficient removal of DOM in initial rainwater and membrane pollution control are realized. Under the optimal working condition operation, the total organic carbon (TOC) removal rate can reach 83% or above. The process is simple, operation is stable, the catalyst can be recycled, and the method is suitable for efficient resource utilization of rainwater and has good engineering practical application potential.

According to the ginseng extraction system and method provided by the invention, the dual goals of high purity and high yield of ginsenoside extraction are achieved through raw material adaptive parameter pre-optimization, self-adaptive cascade purification and activity protection, the enrichment effect of high-value monomer saponin is remarkable, and the loss of active ingredients is accurately controlled. According to the application, a detection-decision-regulation full-process closed-loop intelligent control system is constructed, near infrared spectrum rapid screening and HPLC-MS / MS accurate quantitative dual-mode online detection are fused, real-time and accurate monitoring of the saponin content is realized, and off-line detection and artificial experience parameters are not needed; the multi-target central control unit can automatically decide a purification path and process parameters according to detection data, and designs such as membrane pollution on-line monitoring, automatic backwashing and solvent circulating preheating are combined, so that continuous operation of the process is ensured, and production interruption caused by equipment failure and process fluctuation is avoided.

The application provides a kind of hierarchical extraction and analysis method of unrecoverable pollution in contaminated micro / ultrafiltration membrane, belongs to the field of membrane pollution analysis. Including the following steps: (1) pre-cleaning of contaminated micro / ultrafiltration membrane;(2) after the contaminated membrane is dried after pre-cleaning, immerse in the first solvent extraction liquid, make the membrane and the extraction liquid fully contact, after treatment, solid-liquid separation obtains first extraction liquid;(3) the second solvent extraction liquid is added to the membrane sample treated in step (2), the membrane sample is completely dissolved, and the second extraction liquid is obtained;(4) purification and analysis of extraction liquid: add the first extraction liquid or the second extraction liquid drop by drop to 5-10 times volume of pure water, centrifugal filtration solid after phase inversion to obtain purified extraction liquid, and analyze the physicochemical properties of the extraction liquid. The application extracts the unrecoverable pollution in the membrane under different temperature conditions and solvent concentration gradients by introducing polar organic solvent.

The invention discloses a Yellow River raw water coagulation-sand filtration-ultrafiltration treatment system and method based on a composite filter material, and belongs to the technical field of water treatment. The device comprises a coagulation unit, a sand filtration unit and an ultrafiltration unit which are sequentially connected in the water flow direction. Wherein the sand filtration unit is filled with multiple layers of composite filter materials, and the composite filter materials sequentially comprise an aluminum ion modified quartz sand layer, an aluminum ion modified quartz sand layer and an aluminum ion modified quartz sand layer from top to bottom, the granular active carbon layer is used for deeply adsorbing and removing small molecular organic matters; and the manganese sand layer is used for catalytically removing iron and manganese ions and is used as a supporting layer for stabilizing the filter bed. The method comprises the following steps: carrying out coagulation treatment on Yellow River raw water, introducing the treated Yellow River raw water into the composite sand filtration unit, carrying out deep pretreatment, and filtering the pretreated Yellow River raw water through the ultrafiltration membrane. According to the method, through gradient filtration and function cooperation of the composite filter material, the synchronous removal efficiency of turbidity and UV254 can be remarkably improved, high-quality inlet water is provided for an ultrafiltration membrane, membrane pollution is effectively controlled, system operation energy consumption is reduced, and the method has the advantages of being low in resource consumption, little in environmental pollution, good in economic benefit and the like.

The application discloses a power plant water-energy-salt cascade reuse system for flue gas drying integrated coupling, to solve the problems of low resource utilization efficiency and high energy consumption in the zero discharge technology of power plant wastewater. Through the technologies of circulating cooling water cascade reuse, desulfurization wastewater efficient concentration treatment, desulfurization concentrated water flue gas drying treatment and intelligent monitoring and control unit, the efficient reuse of water, salt and energy in the wastewater is realized. The wastewater is treated through multiple membrane processes such as ultrafiltration, nanofiltration and reverse osmosis, so that the cascade water quality reuse for different purposes is realized. The calcium and magnesium ions are extracted through chemical precipitation and used as industrial raw materials, effectively alleviating the membrane pollution problem of subsequent processes. The high-salinity wastewater is dried by flue gas waste heat to produce industrial salt, realizing the recovery of salt resources. The system adopts an intelligent monitoring and control system, realizes real-time monitoring and automatic adjustment, optimizes the operation efficiency of each treatment unit and reduces energy consumption. The application realizes near-zero discharge of wastewater and efficient reuse of resources, and has significant economic and environmental benefits.

The utility model discloses a drum type equal shear membrane separation device, relates to liquid separation technical field, including pool body, servo motor, drum, brush and peristaltic pump, the drum is placed in the pool body and rotatingly connected, servo motor drives the drum, the outer surface of the drum is wrapped with membrane, and the membrane is arranged in the pool body. The brush is located on the side face of the rotary drum and provided with a distance adjusting mechanism, a hole is formed in the drum face of the rotary drum and communicated with the interior of the pool body, and the interior of the rotary drum is communicated with the peristaltic pump. The utility model provides a rotary drum type equal-shear membrane separation device, which combines dynamic rotation of a rotary drum with an automatic cleaning system, is adjustable and controllable in flow and rotating speed, generates uniform shear force through rotation of the rotary drum, delays membrane pollution and reduces manual intervention.

The invention discloses an automatic backwashing parameter adjusting method for constant-flow ultrafiltration membrane source water filtration equipment, which relates to the technical field of water filtration, and comprises the following steps: initializing a membrane pollution trend parameterized threshold reference in a stable water production stage, adjusting and determining the membrane pollution trend parameterized threshold reference in the stable water production stage, and adjusting and determining the membrane pollution trend parameterized threshold reference in the stable water production stage. A valve opening weight is added to the membrane pollution trend parameterized threshold reference in the stable water production stage, a membrane pollution index trend parameter threshold value based on the valve opening is formulated, a backwashing parameter threshold value used for controlling the physical backwashing process is formulated, and backwashing operation is executed according to the comparison result of the online stable water production stage trend and the backwashing parameter threshold value. According to the automatic backwashing parameter adjusting method for the constant-flow ultrafiltration membrane source water filtering equipment, the opening degree of the valve and the emptying factor of the membrane pool are introduced into a backwashing decision-making mechanism, and the real pollution conditions of the ultrafiltration membrane at different stages and under different conditions of the membrane pollution degree can be better reflected.

The embodiment of the invention discloses an intelligent cooperative regulation and control method and system for coal mine underground water treatment and back-supplement, and the method comprises the steps: obtaining the inflow water quality time sequence data of primary mine water, and predicting the optimal inflow water flow based on the inflow water quality time sequence data through a bidirectional long-short-term memory network, adjusting the water inflow of the sedimentation tank to the flow so as to carry out sedimentation pretreatment on the primary mine water; multi-dimensional membrane operation parameters of the ultrafiltration membrane are obtained after pretreatment, the pollution degree of the ultrafiltration membrane is determined based on the parameters through a variational auto-encoder, an ultrafiltration membrane cleaning strategy is dynamically adjusted based on the pollution degree, and cleaning operation is executed; and after cleaning, acquiring underground hydrological data and refilling water quality data of the target refilling area, and determining a distribution scheme of each refilling well by utilizing a water volume dynamic distribution prediction model fusing a time sequence convolutional network, a gating mechanism and a self-attention mechanism in combination with the underground hydrological data and the refilling water quality data. And according to the distribution scheme, water reaching the standard is supplemented to the target underground water layer through the corresponding supplementing well.

The invention discloses a low-energy-consumption reverse osmosis membrane seawater desalination and water quality regulation and control intelligent system, which comprises: a reverse osmosis treatment module for performing reverse osmosis treatment on seawater to generate fresh water and strong brine; the pressure supply module is used for providing and maintaining the operation pressure required by the reverse osmosis treatment module; the energy recovery module is used for transmitting the pressure energy of the strong brine to the pressure supply module; the monitoring module is used for collecting inlet water quality parameters and operation state parameters, and calculating a membrane pollution index and a pollution rate based on the collected parameters; the intelligent control module is used for adjusting the output pressure and the operation state according to the membrane pollution index and the pollution rate; when the membrane pollution index exceeds a preset threshold value, the output pressure is controlled to be reduced, the opening degree of the adjustable guide vane is synchronously adjusted, the flow proportion of the high-pressure strong brine is increased, and the energy transfer efficiency is improved. The problems that a traditional system is high in energy consumption, membrane pollution response lags behind and cleaning and maintenance are frequent are solved, and water production energy consumption is reduced, the service life of a membrane element is prolonged, and the system runs continuously and stably.

The present application relates to sewage treatment technical field, specifically to a kind of chemical wastewater desalination integrated processing method.The present application overcomes the problem of low resource utilization efficiency of chemical wastewater desalination in prior art;The present application first synthesizes three-dimensional catalytic aerogel microspheres, which are loaded in a fixed bed to target adsorption and catalytic chain scission of macromolecular polymers in high-salinity wastewater with persulfate;Subsequently, a salt-tolerant membrane bioreactor is introduced to form small-molecule organic compounds through deep metabolism;The effluent is sequentially subjected to target complexation and precipitation of heavy metals using modified chitosan and amphoteric polyacrylamide, pre-implantation of polyepoxysuccinic acid scale inhibitor, and finally subjected to nanofiltration and reverse osmosis systems, freeze crystallization and MVR evaporation to extract high-purity sodium sulfate and sodium chloride.The present application effectively solves the problem of membrane fouling caused by heavy metal leakage and organic matter residue in traditional process, and realizes the deep purification of chemical wastewater and the high-value resource recovery of salt.

The invention discloses a membrane pollution cleaning method for treating desizing wastewater by a membrane method, which comprises the following steps of: starting a micro-nano bubble generator to blow nano bubbles taking ozone as a gas source into penetrating fluid to form ozone nano bubble water for backwashing a membrane; wherein the membrane is a ceramic membrane of which the separation layer is made of Fe2O3; the penetrating fluid is obtained after the desizing wastewater is filtered by the ceramic membrane. According to the method, ozone nanobubbles enter a ceramic membrane separation layer under the action of high-pressure recoil force, the membrane pore diameter of the separation layer is matched with the particle diameter of the nanobubbles, the nanobubbles are broken in a confined space of membrane pore channels of the separation layer, and ozone is separated from the separation layer under the catalytic action of Fe2O3 serving as a material of the ceramic membrane separation layer. A large amount of. OH with higher oxidability and higher reaction rate with pollutants is instantaneously released, the pollutants blocked in narrow pore channels are removed, deep cleaning from inside to outside is realized, the membrane cleaning efficiency is improved, the membrane cleaning frequency is reduced, and the membrane system stability is improved.

The utility model relates to a system for treating landfill leachate by coupling forward osmosis and membrane distillation, which mainly solves the following problems in landfill leachate concentrated water treatment: high comprehensive energy consumption, membrane pollution risk and difficulty in regeneration of drawn liquid. The device comprises a pretreatment unit, a forward osmosis module, a membrane distillation module and a draw solution storage tank, a water inlet of the pretreatment unit is connected with a landfill leachate concentrated water source, and a discharge port of the pretreatment unit is connected to a leachate side inlet of the forward osmosis module through a first delivery pump; a draw liquid side outlet of the forward osmosis module is connected to a liquid inlet of the membrane distillation module through a membrane distillation heater and a second delivery pump; a concentrated liquid outlet of the membrane distillation module and a draw liquid side inlet of the forward osmosis module form a closed loop through a draw liquid storage tank; an on-line conductivity monitor is arranged in the draw solution storage tank, and a salt supplementing valve is arranged at a feeding port of the draw solution storage tank. And a reflux pump is arranged between the draw solution storage tank and the forward osmosis module. The method is used for treating the leachate concentrated water of the domestic waste landfill.

The present application relates to the technical field of control system, especially to an intelligent control system of ultrapure water machine, the present application collects water quality data, membrane surface data and filtration pressure through a monitoring module; a state analysis module divides the filtration characteristic state according to the fluctuation of the membrane surface data; a control unit executes a control strategy according to the filtration characteristic state, including, obtaining the filtration pressure, identifying whether there is an abnormal value in the filtration pressure, determining whether to send a warning signal; or, obtaining the water quality data, calculating the fluctuation of the water quality data in each cycle, judging whether the fluctuation is consistent; and executing an adjustment strategy according to the consistency determination result, including, adjusting the water inflow, or sending a warning signal; the present application can improve the pertinence and reliability of system control, effectively delay membrane pollution, reduce membrane loss, and ensure the continuous and stable operation of the ultrapure water machine.

The utility model discloses an intelligent membrane separation device for efficient anaerobic biological treatment, which comprises a device main body, the device main body is divided into a reaction filter chamber and a membrane separation chamber by a baffle, an anaerobic reaction cavity of the reaction filter chamber is connected with a water inlet pipe, a filter assembly is arranged in the reaction filter chamber, and a membrane assembly of the membrane separation chamber is connected with a water outlet pipe. The device main body is connected with a gas recycling assembly through an exhaust pipe and a gas distribution pipe, the gas distribution pipe is connected with an aeration assembly in the membrane separation chamber, and an oxidation-reduction potential detection electrode is arranged in the reaction filtration chamber. According to the utility model, sewage is filtered through the filter assembly and the membrane assembly, sludge is more effectively intercepted, the membrane surface is scoured by combining the aeration assembly, membrane pollution is effectively slowed down, meanwhile, continuous sewage treatment and utilization are realized by controlling each water valve, the sewage filtering speed is also accelerated, and in addition, the anaerobic reaction completion condition of the sewage oxidation-reduction potential reaction is monitored. The dynamic adjustment of the anaerobic reaction is realized.

The invention relates to the technical field of sewage treatment, in particular to an efficient sewage treatment and purification system, and solves the problems that in the sewage treatment process, high sludge concentration inevitably causes membrane pollution and blockage, and membrane surface pollutant deposition causes flux reduction, frequent cleaning and too high operation cost. Comprising a tank body, a deslagging end plate and a plurality of sewage inlet pipes are inserted into one end of the tank body in a penetrating manner, a clear water outlet end plate is inserted into the other end of the tank body in a penetrating manner, a membrane filtration module is detachably mounted in the tank body, and the interior of the tank body is divided into a biological treatment air flotation bin and a clear water bin by the membrane filtration module; the inner side of the biological treatment air floatation bin is filled with a plurality of biofilm carrier modules. According to the invention, collaborative optimization of sewage treatment efficiency, energy consumption and membrane service life is realized through the technologies of increasing the microbial loading capacity by polyurethane sponge, enhancing mass transfer by micro-nano bubbles and preventing pollution by membrane surface air floatation.

The invention discloses a medicine production waste liquid separation and recovery system which comprises a conical settling chamber, a pulse back-flushing membrane assembly, a modular membrane bag, a mixing tank and a miniature vacuum pump, the mixing tank is used for containing medicine waste liquid or enriched liquid, and slurry in the mixing tank is discharged into the conical settling chamber; the conical settling chamber is used for dividing separation slurry into large-particle impurities and suspension liquid, the suspension liquid contains medium particles and small particles, the pulse back-flushing membrane assembly is used for separating the suspension liquid into enrichment liquid and solvent permeation liquid, and the modular membrane bag is used for separating the solvent permeation liquid into the enrichment liquid and a high-concentration solvent. According to the invention, the membrane pollution rate of the pulse backflushing membrane assembly is reduced, the liquid level stability and the concentration dynamic balance are realized, the solid content control precision of the enriched liquid is improved, the recovery purity of the medicine production waste liquid is improved, and the operation energy consumption of the system is reduced.

The application provides a device for synergistically controlling disinfection by-products and conditional pathogenic bacteria of surface water by a low-temperature-resistant bank filtration-nanofiltration combined process and a working method thereof, and belongs to the technical field of water treatment and efficient water resource utilization. An aeration disc is arranged at the inner bottom of a raw water tank in the device, a bank filtration simulation column is filled with multiple layers of filter materials, the outlet end of the raw water tank is communicated with the water inlet of the bank filtration simulation column through a peristaltic pump, the water inlet of the bank filtration simulation column is located above the bank filtration simulation column, the water outlet at the lowermost part of the bank filtration simulation column is communicated with the water inlet of a bank filtration water collecting tank, the water outlet of the bank filtration water collecting tank is communicated with the water inlet of a nanofiltration membrane assembly, the clean water outlet of the nanofiltration membrane assembly is communicated with a nanofiltration water collecting tank, and the concentrated water outlet of the nanofiltration membrane assembly is communicated with a nanofiltration concentrated water tank. The device can solve the problem of unstable water quality of bank filtration caused by environmental factors, and can also alleviate the membrane pollution problem of nanofiltration technology through bank filtration pretreatment.

This invention discloses an application device and method for high-efficiency, anti-fouling MBR membrane modules in wastewater treatment. The MBR tank of this device employs special materials and structural design, resulting in a reasonable hydraulic retention time. The MBR membrane module is made of modified PVDF, with precisely controlled membrane pore size and reinforced ribs and a unique encapsulation structure. Combined with an aeration device featuring a central aeration nozzle, it effectively solves problems such as membrane breakage, entanglement, and aeration dead zones. It is also equipped with comprehensive supporting equipment, and automated operation and precise control are achieved through an online monitoring and control system. The application method covers steps including biological wastewater treatment, membrane filtration, air scrubbing, backwashing, and chemical cleaning, and maintenance and optimization are performed based on water quality and equipment conditions. This invention significantly improves wastewater treatment efficiency and water quality stability, reduces membrane fouling and operating costs, extends membrane module lifespan, is highly adaptable, and offers intelligent and simple operation, providing an innovative and efficient solution for wastewater treatment.

This invention discloses an antifouling membrane made of lanthanum-loaded carbon nanomaterials suitable for phosphorus recovery in wastewater, its preparation method, and its applications. The invention involves loading lanthanum carbonate octahydrate onto the surface of multi-walled carbon nanotubes (MWCNTs) to form lanthanum-loaded carbon nanomaterials (La@MWCNTs), which are then deposited onto the surface of a polyethersulfone-based membrane using vacuum filtration to form a self-supporting membrane. The prepared lanthanum-loaded carbon nanomaterial antifouling membrane possesses both phosphorus removal and recovery capabilities, exhibiting high efficiency in phosphorus removal from water. This facilitates phosphorus elution and recovery, effectively solving the problems of lanthanum-loaded carbon nanomaterial aggregation and recovery, and effectively avoiding the risk of lanthanum-based adsorbent leakage during phosphorus removal. Furthermore, the lanthanum-loaded carbon nanomaterial antifouling membrane operates within a low-pressure range, exhibiting low energy consumption and effectively mitigating membrane fouling caused by humic acid. It shows promising application prospects in wastewater phosphorus recovery and eutrophication control.