Intelligent regulation and control ceramic membrane microalgae recovery system and method

Abstract

The application is a kind of intelligent regulation and control ceramic membrane microalgae recovery system and method.The application relates to the technical field of microalgae recovery, the application inoculates target microalgae varieties in a microalgae culture pond, and sets appropriate temperature, light intensity, nutrient substance addition amount initial culture conditions according to the growth characteristics of microalgae; each parameter in the microalgae culture pond is monitored in real time through an intelligent monitoring module; according to the monitoring data, a ceramic membrane filtration unit is controlled through a feedback control unit, the filtration performance of the culture solution is improved, and the stability of the membrane flux is maintained. Compared with the traditional ceramic membrane recovery method, the microalgae recovery efficiency is improved by more than 30%, the membrane pollution degree is reduced by more than 40%, the economic benefit and environmental benefit of microalgae recovery are greatly improved, and a solid foundation is laid for the large-scale industrialized development and utilization of microalgae resources.

Description

Technical Field

[0001] This invention relates to the field of microalgae recovery technology, specifically an intelligent control system and method for microalgae recovery using ceramic membranes. More particularly, it relates to an innovative system and method for achieving efficient microalgae recovery via ceramic membranes through intelligent monitoring and feedback control mechanisms. This system can be widely applied to microalgae separation and recovery processes in numerous microalgae-related industries, including bioenergy, food additives, and health product raw materials. Background Technology

[0002] Ceramic membranes, also known as inorganic ceramic membranes, are asymmetric membranes formed from inorganic ceramic materials through a special process. There are two types of ceramic membranes: tubular ceramic membranes and flat-sheet ceramic membranes. Tubular ceramic membranes have numerous micropores on their walls. Under pressure, the feed liquid flows inside or outside the membrane tube. Small molecules (or liquids) permeate through the membrane, while large molecules (or solids) are retained, thus achieving separation, concentration, purification, and environmental protection. Flat-sheet ceramic membranes have numerous micropores on their surface. Within a certain pore size range, the permeability varies depending on the diameter of the molecules that permeate. Driven by the pressure difference across the membrane, the membrane acts as the filtration medium. Under certain pressure, when the feed liquid flows across the membrane surface, only water, inorganic salts, and small molecules are allowed to permeate, while suspended solids, colloids, and microorganisms are prevented from passing through. Ceramic membranes have numerous advantages, including high separation efficiency, stable performance, good chemical stability, resistance to acids and alkalis, resistance to organic solvents, antibacterial properties, high temperature resistance, antifouling properties, high mechanical strength, good regeneration performance, simple separation process, low energy consumption, easy operation and maintenance, and long service life. They have been successfully applied in many fields such as food, beverage, plant (medicine) deep processing, biomedicine, fermentation, and fine chemicals, and can be used for separation, clarification, purification, concentration, sterilization, and desalination in process technology.

[0003] Currently, traditional ceramic membrane recovery technology faces numerous challenges in the field of microalgae recovery. Microalgae exhibit varying physiological characteristics and concentration changes at different growth stages, making it difficult to maintain consistently high efficiency in ceramic membrane recovery processes with fixed parameters. On the one hand, recovery efficiency fluctuates significantly and is difficult to control precisely. In the later stages of microalgae growth, when cell density is too high, membrane pore blockage easily occurs, leading to a sharp drop in recovery flux. On the other hand, membrane fouling is frequent and difficult to effectively control, greatly shortening the lifespan of ceramic membranes and increasing operating costs and maintenance difficulty. For example, large molecules such as polysaccharides and proteins produced by microalgae metabolism easily adsorb onto the membrane surface, forming a gel layer that is difficult to completely remove using conventional cleaning methods. These problems limit the widespread application of microalgae recovery technology in large-scale industrial production. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an intelligent control system and method for recovering microalgae from ceramic membranes.

[0005] This invention provides the following technical solutions:

[0006] A smart control ceramic membrane microalgae recovery system, the system comprising a microalgae cultivation tank, a ceramic membrane filtration unit, an intelligent monitoring unit, a reagent dosing device, and a feedback control unit;

[0007] The microalgae culture tank includes a stirrer, an inlet and an outlet valve, and the ceramic membrane filtration unit includes a filtered water inlet, a rotator, a filtered water outlet and a microalgae collection port.

[0008] The microalgae culture tank provides suitable environmental conditions for microalgae growth. The stirrer ensures that the microalgae are evenly distributed in the culture solution, guaranteeing the uniform intake of nutrients and light.

[0009] The ceramic membrane filter unit has a filter membrane mounted on its rotator, and the rotator adopts a spiral flow channel membrane assembly structure.

[0010] The intelligent monitoring unit monitors various parameters in the microalgae culture tank. When the microalgae concentration rises to the preset recovery concentration standard and the membrane flux of the ceramic membrane filtration unit shows signs of decline, the feedback control unit quickly intervenes to optimize the operating parameters of the ceramic membrane filtration unit. The feedback control unit controls the reagent dosing device to add polyaluminum chloride according to the severity of membrane fouling.

[0011] Preferably, the intelligent monitoring unit includes a particle size analyzer, an ultraviolet spectrophotometer, and a pressure sensor;

[0012] The particle size of algal cells was determined using a particle size analyzer.

[0013] The UV680 value and UV254 content in algae-containing water were determined using an ultraviolet spectrophotometer.

[0014] The transmembrane pressure difference of the ceramic membrane was measured using a pressure sensor during microalgae recovery.

[0015] Preferably, the filter membrane disc is made of inorganic material, with a nominal pore size of 100nm, an operating pressure of 0.1-0.5bar, an operating temperature of 0-60℃, and a pH range of 0-12;

[0016] The membrane consists of two membrane layers, with a flow channel inside and several liquid outlet holes around the middle. During filtration, the liquid is filtered from the outside to the inside.

[0017] Preferably, the pitch of the spiral flow channel membrane module structure is adjusted between 5 and 20 cm, the flow channel width is 3 to 8 mm, and the membrane tube diameter is 10 to 30 mm.

[0018] A method for intelligently regulating microalgae recovery via ceramic membrane, the method comprising the following steps:

[0019] Step 1: Inoculate the target microalgae species into the microalgae culture tank, and set appropriate initial culture conditions such as temperature, light intensity, and nutrient addition based on the growth characteristics of the microalgae.

[0020] Step 2: Monitor various parameters in the microalgae culture tank in real time using the intelligent monitoring module;

[0021] Step 3: Based on the monitoring data, control the ceramic membrane filtration unit through the feedback control unit to improve the filtration performance of the culture medium and maintain the stability of the membrane flux;

[0022] When the membrane flux decreases by more than 8% and the microalgae concentration is higher than the set value, immediately increase the backwashing frequency and fine-tune the backwashing pressure according to the microalgae particle size distribution to ensure efficient removal of contaminants from the membrane surface while avoiding excessive damage to the microalgae.

[0023] Preferably, after establishing a linear relationship between the UV680 value and the algal cell concentration using a UV spectrophotometer through a linear function y=ax±b, the concentration of algal cells in the growth period can be obtained by measuring the UV680 value.

[0024] The ultraviolet spectrophotometer simultaneously measures the UV254 content in algae-containing water and transmits the data to the feedback control unit, providing a basis for determining the microalgae growth stage.

[0025] Preferably, the particle size of algal cells is measured by a particle size analyzer. When the particle size analyzer detects that the particle size of the microalgae culture tank has reached maturity, the data is transmitted to the feedback control unit. The feedback control unit determines the operating parameters of the ceramic membrane filtration unit based on the particle size distribution data and the UV680 and UV254 indicators to reduce membrane fouling in a targeted manner.

[0026] Preferably, the pressure sensor transmits the transmembrane pressure difference value to the feedback control unit. After the feedback control unit determines that the transmembrane pressure difference of the ceramic membrane filter unit exceeds the set value, it issues a backwashing command to enable the ceramic membrane to recover its performance as soon as possible. The feedback control unit then controls the chemical dosing device to add polyaluminum chloride.

[0027] When the UV254 data detected by the UV spectrophotometer increases, it indicates that the organic matter index of the culture medium is rising. When the pressure sensor detects an increase in the transmembrane pressure difference of the ceramic membrane filtration unit, the feedback control unit will automatically control the addition of a specific filter aid, polyaluminum chloride, to improve the filtration performance of the culture medium and maintain the stability of the membrane flux.

[0028] When the dosage of polyaluminum chloride is controlled at 20 mg / L, the transmembrane pressure difference is reduced by more than 40%.

[0029] A computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement an intelligent control method for recovering microalgae from ceramic membranes.

[0030] A computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement an intelligent control method for recovering microalgae from ceramic membranes.

[0031] The present invention has the following beneficial effects:

[0032] Compared with the prior art, the present invention:

[0033] Unlike traditional straight-tube or simple curved-tube flow channels, this design optimizes membrane filtration performance during microalgae recovery from a structural perspective. The filtration unit is connected to high-precision pressure and flow sensors for real-time monitoring of key operational data such as membrane flux and transmembrane pressure differential. The pressure sensor accuracy reaches ±0.01 MPa, and the flow sensor accuracy is ±0.1 L / min, enabling precise capture of subtle changes in membrane operating conditions and providing reliable data support for subsequent feedback control.

[0034] The tank body of this invention is constructed with corrosion-resistant and acid-alkali-resistant materials, with a smooth inner wall for easy cleaning and maintenance. Its volume can be flexibly designed according to the actual production scale, ranging from several cubic meters to hundreds of cubic meters. It is also equipped with a stirring device to ensure that the microalgae are evenly distributed in the culture medium, guaranteeing the uniform intake of nutrients and light.

[0035] This invention integrates multiple advanced sensors, enabling precise measurement of microalgae concentration and particle size distribution in microalgae cultivation tanks.

[0036] This invention has been verified through extensive experimental comparisons. Under the same microalgae cultivation and recovery conditions, the intelligent control ceramic membrane microalgae recovery system of this invention significantly improves the microalgae recovery efficiency by more than 30% and reduces the membrane fouling level by more than 40% compared with the traditional ceramic membrane recovery method. This greatly enhances the economic and environmental benefits of microalgae recovery and lays a solid foundation for the large-scale industrial development and utilization of microalgae resources. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a diagram illustrating the device structure and experimental flow of the present invention;

[0039] Figure 2 This is a cross-sectional view of the diaphragm of the present invention;

[0040] Figure 3 This is a schematic diagram illustrating the relationship between algal cell concentration and UV680 value in this invention;

[0041] Figure 4 This is a schematic diagram illustrating the determination of algal cell particle size distribution according to the present invention;

[0042] Figure 5 This is a schematic diagram illustrating the relationship between the dosage of polyaluminum chloride and membrane fouling resistance based on feedback control according to the present invention.

[0043] Among them, 1-microalgae cultivation tank, 11-water inlet, 12-stirrer, 13-water outlet valve; 2-ceramic membrane filtration unit, 21-filtered water inlet, 22-rotator, 23-filtered water outlet, 24-microalgae collection port; 3-particle size analyzer; 4-ultraviolet spectrophotometer; 5-pressure sensor; 6-reagent dosing device; 7-feedback control unit. Detailed Implementation

[0044] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0048] The present invention will be described in detail below with reference to specific embodiments. Specific Implementation Example 1:

[0050] according to Figures 1-5 As shown, the specific optimized technical solution adopted by the present invention to solve the above-mentioned technical problems is: The present invention relates to an intelligent control ceramic membrane microalgae recovery system and method.

[0051] A smart control ceramic membrane microalgae recovery system, the system comprising a microalgae cultivation tank 1, a ceramic membrane filtration unit 2, an intelligent monitoring unit, a reagent dosing device 6, and a feedback control unit 7;

[0052] The microalgae culture tank 1 includes a stirrer 12, an inlet 11 and an outlet valve 13, and the ceramic membrane filtration unit 2 includes a filtered water inlet 21, a rotator 22, a filtered water outlet 23 and a microalgae collection port 24.

[0053] The microalgae culture tank 1 provides suitable environmental conditions for microalgae growth. The stirrer 12 ensures that the microalgae are evenly distributed in the culture solution, thus ensuring the uniform intake of nutrients and light.

[0054] A filter membrane is provided on the rotator 22 of the ceramic membrane filter unit 2, and the rotator 22 adopts a spiral flow channel membrane assembly structure.

[0055] The intelligent monitoring unit monitors various parameters in the microalgae culture tank 1. When the microalgae concentration rises to the preset recovery concentration standard and the membrane flux of the ceramic membrane filtration unit 2 shows signs of decline, the feedback control unit 7 quickly intervenes to optimize the operating parameters of the ceramic membrane filtration unit 2. The feedback control unit 7 controls the reagent dosing device 6 to add polyaluminum chloride according to the severity of membrane fouling.

[0056] Microalgae Culture Tank 1: Provides suitable environmental conditions for microalgae growth, equipped with conventional temperature and light control devices to ensure stable microalgae growth. The tank body is constructed of corrosion-resistant and acid- and alkali-resistant materials, with smooth inner walls for easy cleaning and maintenance. Its volume can be flexibly designed according to actual production scale, ranging from several cubic meters to hundreds of cubic meters. It also has a stirring device to ensure uniform distribution of microalgae in the culture medium, guaranteeing even absorption of nutrients and light.

[0057] Ceramic membrane filtration unit 2: Utilizing a specially designed spiral flow channel membrane module structure, this unique design significantly extends the contact time and area between microalgae and the membrane surface, effectively improving the material exchange efficiency between microalgae and the membrane, thereby enhancing the recovery effect. The spiral flow channel pitch is adjustable between 5-20 cm, the channel width is 3-8 mm, and the membrane tube diameter is 10-30 mm. This size design, optimized through multiple experiments, minimizes energy consumption while ensuring flux. Simultaneously, the spiral flow channel facilitates strong water flow turbulence during backwashing, which is more conducive to removing impurities and microalgae residues attached to the membrane surface, reducing membrane fouling and ensuring long-term stable operation. Unlike traditional straight-tube or simple curved-tube flow channels, this design structurally optimizes membrane filtration performance during microalgae recovery. The filtration unit is connected to a high-precision pressure sensor and flow sensor for real-time monitoring of key operating data such as membrane flux and transmembrane pressure differential. The pressure sensor 5 has an accuracy of ±0.01MPa, and the flow sensor has an accuracy of ±0.1L / min. They can accurately capture subtle changes in the membrane's operating state and provide reliable data support for subsequent feedback control.

[0058] The ceramic ultrafiltration material is an inorganic material used for inward filtration. The disc material is also inorganic, with a nominal pore size of 100 nm, an operating pressure of 0-0.5 bar, an operating temperature of 0-60℃, and a pH range of 0-12. The membrane consists of two membrane layers, with internal flow channels and several outlet holes around the center. During filtration, the liquid is filtered from the outside in.

[0059] Intelligent Monitoring Unit: Integrating multiple advanced sensors, this unit can accurately measure the concentration and particle size distribution of microalgae in the microalgae culture tank 1. The particle size analyzer 3, based on the principle of laser scattering, can acquire real-time particle size information of microalgae, with a measurement range of 1-100 micrometers and a resolution of 0.1 micrometers, providing crucial information for determining the microalgae growth stage. Continuous monitoring of parameters such as UV680 and UV254 in the culture medium assesses the number of algal cells, organic matter content, and accumulation of microalgal metabolites. This data is critical for timely adjustments to the microalgae culture environment and for predicting membrane fouling risks. Connected to sensors in the ceramic membrane filtration unit 2, all monitoring data is collected and transmitted to the feedback control unit 7. Data transmission utilizes high-speed, stable wireless transmission technology to ensure real-time data accuracy, with a transmission frequency of once every 5 seconds.

[0060] By establishing a linear relationship between the UV680 value and algal cell concentration using a linear function y = ax ± b through the UV spectrophotometer 4, the concentration of algal cells during the growth phase can be obtained by measuring the UV680 value. The UV spectrophotometer 4 can also measure the UV254 content in algae-containing water. UV254 represents the content of humic organic matter in the water. A higher humic matter content in algae-containing water indicates poorer algal cell activity, and vice versa. The cell activity state is directly related to the efficiency of microalgae in the membrane filtration process. The UV spectrophotometer 4 transmits data to the feedback control unit 7, providing important information for determining the microalgal growth stage.

[0061] The particle size of algal cells is measured by particle size analyzer 3. Particle size is an important indicator for judging the maturity of algal cell growth. The cell diameter of Chlorella with good maturity can reach 3.0-8.0 μm. When particle size analyzer 3 detects that the particle size of microalgae culture tank 1 has reached maturity, it transmits the data to feedback control unit 7. Feedback control unit 7 can determine the operating parameters of ceramic membrane filter unit 2 based on the particle size distribution data and the UV680 and UV254 indicators to reduce membrane fouling in a targeted manner.

[0062] The pressure sensor 5 can obtain the transmembrane pressure difference of the ceramic membrane during microalgae recovery. During microalgae recovery, the transmembrane pressure difference increases rapidly in the early stage and then reaches a constant value. When the pressure sensor 5 transmits the transmembrane pressure difference value to the feedback control unit 7, the feedback control unit 7 determines that the transmembrane pressure difference of the ceramic membrane filter unit 6 exceeds the set value and issues a backwashing command to restore the performance of the ceramic membrane as soon as possible. At the same time, the feedback control unit 7 will control the chemical dosing device 6 to add polyaluminum chloride according to the severity of membrane fouling.

[0063] When the UV254 reading detected by the UV spectrophotometer 4 increases, it indicates an increase in the organic matter content of the culture medium, suggesting an increase in macromolecular organic matter or microalgal secretions, which may exacerbate the risk of membrane fouling. When the pressure sensor 5 detects an increase in the transmembrane pressure difference of the ceramic membrane filtration unit 2, it triggers the feedback control unit 7 to automatically add a specific filter aid, such as an appropriate amount of polyaluminum chloride, to improve the filtration performance of the culture medium and maintain stable membrane flux. In Example 1 of this invention, the filter aid used is polyaluminum chloride. When the dosage of polyaluminum chloride is 20 mg / L, it can reduce the transmembrane pressure difference by more than 40%.

[0064] Feedback Control Unit 7: Based on massive amounts of data transmitted from the intelligent monitoring module, it performs rapid calculations and decisions, dynamically adjusting parameters according to the characteristics of different microalgae growth stages and membrane operating status, whereas traditional methods often use fixed parameter settings. The algorithm employs a machine learning model, trained and optimized with extensive experimental data, enabling it to accurately predict membrane fouling trends and the optimal time for microalgae recovery. When the microalgae concentration reaches the preset recovery threshold and the membrane flux begins to decline, the automatic adjustment program is quickly initiated to optimize the operating parameters of the ceramic membrane filtration unit. For example, in the early stages of microalgae growth, because the microalgae cells are relatively fragile, the feedback control unit will instruct the ceramic membrane filtration unit to appropriately reduce the filtration flow rate, generally below 0.05 m / s, thereby effectively reducing mechanical damage to the microalgae cells and ensuring the integrity and activity of the microalgae. During the vigorous growth period of microalgae, when the microalgae concentration increases significantly while the membrane flux remains relatively stable, the filtration pressure can be increased in a timely manner, gradually rising to 0.3 MPa, while simultaneously optimizing the backwashing strategy, such as shortening the backwashing interval to 15 minutes and extending the backwashing duration to 60 seconds, to ensure efficient microalgae recovery while effectively preventing the aggravation of membrane fouling. Operating parameters are flexibly adjusted according to changes in the characteristics of the culture medium. When UV254 monitoring data shows an increase in the organic matter index of the culture medium, indicating an increase in macromolecular organic matter or microalgae secretions, which may exacerbate the risk of membrane fouling, the feedback control unit automatically controls the addition of specific filter aids, such as an appropriate amount of polyaluminum chloride. The amount added can be calculated and determined according to a specific ratio based on the organic matter level to improve the filtration performance of the culture medium and maintain stable membrane flux. Specific Implementation Example 2:

[0066] The difference between Embodiment 2 and Embodiment 1 of the present invention lies only in:

[0067] The intelligent monitoring unit includes a particle size analyzer 3, an ultraviolet spectrophotometer 4, and a pressure sensor 5;

[0068] The particle size of algal cells was determined using a particle size analyzer 3.

[0069] The UV-680 value and UV-254 content in algae-containing water were determined using a UV spectrophotometer 4.

[0070] The transmembrane pressure difference of the ceramic membrane during microalgae recovery was measured using pressure sensor 5. Specific Implementation Example 3:

[0072] The difference between Embodiment 3 and Embodiment 2 of the present invention lies only in:

[0073] The filter membrane discs are made of inorganic materials, with a nominal pore size of 100nm, an operating pressure of 0.1-0.5bar, an operating temperature of 0-60℃, and a pH range of 0-12.

[0074] The membrane consists of two membrane layers, with a flow channel inside and several liquid outlet holes around the middle. During filtration, the liquid is filtered from the outside to the inside. Specific Implementation Example 4:

[0076] The only difference between Embodiment 4 and Embodiment 3 of the present invention is that:

[0077] The pitch of the spiral flow channel membrane module structure can be adjusted between 5 and 20 cm, the flow channel width is 3 to 8 mm, and the membrane tube diameter is 10 to 30 mm. Specific Implementation Example 5:

[0079] The difference between Embodiment 5 and Embodiment 4 of the present invention lies only in:

[0080] This invention provides a method for intelligently regulating the recovery of microalgae using ceramic membranes, the method comprising the following steps:

[0081] Step 1: Inoculate the target microalgae species into microalgae culture tank 1, and set appropriate initial culture conditions such as temperature, light intensity, and nutrient addition amount according to the growth characteristics of microalgae.

[0082] Step 2: Monitor various parameters in the microalgae culture tank 1 in real time using the intelligent monitoring module;

[0083] Step 3: Based on the monitoring data, control the ceramic membrane filtration unit through the feedback control unit to improve the filtration performance of the culture medium and maintain the stability of the membrane flux;

[0084] When the membrane flux decreases by more than 8% and the microalgae concentration is higher than the set value, the backwashing frequency is immediately increased, and the backwashing pressure is finely adjusted according to the microalgae particle size distribution to ensure that while efficiently removing contaminants from the membrane surface, excessive damage to the microalgae is avoided. Specific Implementation Example Six:

[0086] The difference between Embodiment Six and Embodiment Five of the present invention lies only in:

[0087] After establishing a linear relationship between the UV680 value and the algal cell concentration using a UV spectrophotometer 4 and the linear function y=ax±b, the concentration of algal cells in the growth period can be obtained by measuring the UV680 value.

[0088] The UV spectrophotometer 4 simultaneously measures the UV254 content in algae-containing water and transmits the data to the feedback control unit, providing a basis for determining the microalgae growth stage. Specific Implementation Example 7:

[0090] The difference between Embodiment Seven and Embodiment Six of the present invention lies only in:

[0091] The particle size of algal cells is measured by particle size analyzer 3. When particle size analyzer 3 detects that the particle size of microalgae culture tank 1 has reached maturity, the data is transmitted to the feedback control unit. The feedback control unit determines the operating parameters of the ceramic membrane filtration unit based on the particle size distribution data and the UV680 and UV254 indicators to reduce membrane fouling in a targeted manner. Specific Implementation Example 8:

[0093] The difference between Embodiment 8 and Embodiment 7 of the present invention lies only in:

[0094] Pressure sensor 5 transmits the transmembrane pressure difference value to the feedback control unit. After the feedback control unit determines that the transmembrane pressure difference of the ceramic membrane filter unit exceeds the set value, it issues a backwashing command to restore the performance of the ceramic membrane as soon as possible. The feedback control unit controls the chemical dosing device 6 to add polyaluminum chloride.

[0095] When the UV spectrophotometer 4 detects an increase in UV254 data, it indicates an increase in the organic matter index of the culture medium. When the pressure sensor 5 detects an increase in the transmembrane pressure difference of the ceramic membrane filtration unit, both of these will trigger the feedback control unit to automatically add a specific filter aid, polyaluminum chloride, to improve the filtration performance of the culture medium and maintain the stability of the membrane flux.

[0096] When the dosage of polyaluminum chloride is controlled at 20 mg / L, the transmembrane pressure difference is reduced by more than 40%. Specific Implementation Example Nine:

[0098] The difference between Embodiment Nine and Embodiment Eight of the present invention lies only in:

[0099] The present invention provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement, for example, a smart control method for recovering microalgae from ceramic membranes.

[0100] The method includes the following steps:

[0101] Step 1: Inoculate the target microalgae species into the microalgae culture tank, and set appropriate initial culture conditions such as temperature, light intensity, and nutrient addition based on the growth characteristics of the microalgae.

[0102] Step 2: Monitor various parameters in the microalgae culture tank in real time using the intelligent monitoring module;

[0103] Step 3: Based on the monitoring data, control the ceramic membrane filtration unit through the feedback control unit to improve the filtration performance of the culture medium and maintain the stability of the membrane flux;

[0104] When the membrane flux decreases by more than 8% and the microalgae concentration is higher than the set value, the backwashing frequency is immediately increased, and the backwashing pressure is finely adjusted according to the microalgae particle size distribution to ensure that while efficiently removing contaminants from the membrane surface, excessive damage to the microalgae is avoided. Specific Implementation Example 10:

[0106] The only difference between Embodiment 10 and Embodiment 9 of the present invention is that:

[0107] The present invention provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement an intelligent control method for recovering microalgae from ceramic membranes.

[0108] The method includes the following steps:

[0109] Step 1: Inoculate the target microalgae species into the microalgae culture tank, and set appropriate initial culture conditions such as temperature, light intensity, and nutrient addition based on the growth characteristics of the microalgae.

[0110] Step 2: Monitor various parameters in the microalgae culture tank in real time using the intelligent monitoring module;

[0111] Step 3: Based on the monitoring data, control the ceramic membrane filtration unit through the feedback control unit to improve the filtration performance of the culture medium and maintain the stability of the membrane flux;

[0112] When the membrane flux decreases by more than 8% and the microalgae concentration is higher than the set value, the backwashing frequency is immediately increased, and the backwashing pressure is finely adjusted according to the microalgae particle size distribution to ensure that while efficiently removing contaminants from the membrane surface, excessive damage to the microalgae is avoided. Specific Implementation Example Eleven:

[0114] The only difference between Embodiment Eleven and Embodiment Ten of this invention is that:

[0115] This invention first involves inoculating the target microalgae species into a microalgae culture tank according to a standard inoculation procedure, and setting appropriate initial culture conditions such as temperature, light intensity, and nutrient addition based on the growth characteristics of the microalgae. An intelligent monitoring module then activates, conducting comprehensive and continuous real-time monitoring of various parameters within the microalgae culture tank. When the microalgae concentration rises to a pre-set recovery concentration standard, and the membrane flux of the ceramic membrane filtration unit shows signs of decline, the feedback control unit quickly intervenes. During the recovery process, the feedback control unit strictly adheres to preset time intervals, such as every 20 minutes, to perform a comprehensive analysis and processing of the monitoring data. If the membrane flux decreases by more than 8%, and the microalgae concentration exceeds the set value, the backwashing frequency is immediately increased, and the backwashing pressure is fine-tuned based on the microalgae particle size distribution to ensure efficient removal of contaminants from the membrane surface while avoiding excessive damage to the microalgae. Through extensive experimental comparisons and verifications, under the same microalgae cultivation and recovery conditions, the intelligent control ceramic membrane microalgae recovery system of this invention significantly improves microalgae recovery efficiency by more than 30% and reduces membrane fouling by more than 40% compared with traditional ceramic membrane recovery methods. This greatly enhances the economic and environmental benefits of microalgae recovery and lays a solid foundation for the large-scale industrial development and utilization of microalgae resources.

[0116] The above description is merely a preferred embodiment of an intelligent control ceramic membrane microalgae recovery system and method. The scope of protection for such an intelligent control ceramic membrane microalgae recovery system and method is not limited to the above embodiments; all technical solutions falling within this conceptual framework are within the scope of protection of this invention. It should be noted that for those skilled in the art, any improvements and variations made without departing from the principles of this invention should also be considered within the scope of protection of this invention.

Claims

1. A smart control ceramic membrane microalgae recovery system, characterized in that: The system includes a microalgae culture tank, a ceramic membrane filtration unit, an intelligent monitoring unit, a reagent dosing device, and a feedback control unit. The microalgae cultivation tank includes a stirrer, an inlet, and an outlet valve; the ceramic membrane filtration unit includes a filtered water inlet, a rotator, a filtered water outlet, and a microalgae collection port. The microalgae culture tank provides suitable environmental conditions for microalgae growth. The stirrer ensures that the microalgae are evenly distributed in the culture solution, guaranteeing the uniform intake of nutrients and light. The ceramic membrane filter unit has a filter membrane mounted on its rotator, and the rotator adopts a spiral flow channel membrane assembly structure. The intelligent monitoring unit monitors various parameters in the microalgae culture tank. When the microalgae concentration rises to the preset recovery concentration standard and the membrane flux of the ceramic membrane filtration unit shows signs of decline, the feedback control unit quickly intervenes to optimize the operating parameters of the ceramic membrane filtration unit. The feedback control unit controls the reagent dosing device to add polyaluminum chloride according to the severity of membrane fouling.

2. The system according to claim 1, characterized in that: The intelligent monitoring unit includes a particle size analyzer, an ultraviolet spectrophotometer, and a pressure sensor; The particle size of algal cells was determined using a particle size analyzer. The UV680 value and UV254 content in algae-containing water were determined using an ultraviolet spectrophotometer. The transmembrane pressure difference of the ceramic membrane was measured using a pressure sensor during microalgae recovery.

3. The system according to claim 2, characterized in that: The filter membrane discs are made of inorganic materials, with a nominal pore size of 100 nm, an operating pressure of 0.1-0.5 bar, an operating temperature of 0-60℃, and a pH range of 0-12. The membrane consists of two membrane layers, with a flow channel inside and several liquid outlet holes around the middle. During filtration, the liquid is filtered from the outside to the inside.

4. The system according to claim 3, characterized in that: The pitch of the spiral flow channel membrane module structure can be adjusted between 5 and 20 cm, the flow channel width is 3 to 8 mm, and the membrane tube diameter is 10 to 30 mm.

5. A method for intelligently regulating the recovery of microalgae using a ceramic membrane, the method being based on the system operation of claim 1, characterized in that: The method includes the following steps: Step 1: Inoculate the target microalgae species into the microalgae culture tank, and set appropriate initial culture conditions such as temperature, light intensity, and nutrient addition based on the growth characteristics of the microalgae. Step 2: Monitor various parameters in the microalgae culture tank in real time using the intelligent monitoring module; Step 3: Based on the monitoring data, control the ceramic membrane filtration unit through the feedback control unit to improve the filtration performance of the culture medium and maintain the stability of the membrane flux; When the membrane flux decreases by more than 8% and the microalgae concentration is higher than the set value, the backwashing frequency is immediately increased, and the backwashing pressure is finely adjusted according to the microalgae particle size distribution to ensure that while efficiently removing contaminants from the membrane surface, excessive damage to the microalgae is avoided.

6. The method according to claim 5, characterized in that: After establishing a linear relationship between the UV680 value and the algal cell concentration using a UV spectrophotometer through a linear function y=ax±b, the concentration of algal cells in the growth period can be obtained by measuring the UV680 value. The ultraviolet spectrophotometer simultaneously measures the UV254 content in algae-containing water and transmits the data to the feedback control unit, providing a basis for determining the microalgae growth stage.

7. The method according to claim 6, characterized in that: The particle size of algal cells is measured by a particle size analyzer. When the particle size analyzer detects that the particle size in the microalgae culture tank has reached maturity, the data is transmitted to the feedback control unit. The feedback control unit determines the operating parameters of the ceramic membrane filtration unit based on the particle size distribution data and the UV680 and UV254 indicators to reduce membrane fouling in a targeted manner.

8. The method according to claim 7, characterized in that: The pressure sensor transmits the transmembrane pressure difference value to the feedback control unit. After the feedback control unit determines that the transmembrane pressure difference of the ceramic membrane filter unit exceeds the set value, it issues a backwashing command to enable the ceramic membrane to recover its performance as soon as possible. The feedback control unit then controls the chemical dosing device to add polyaluminum chloride. When the UV254 data detected by the UV spectrophotometer increases, it indicates that the organic matter index of the culture medium is rising. When the pressure sensor detects an increase in the transmembrane pressure difference of the ceramic membrane filtration unit, the feedback control unit will automatically control the addition of the filter aid polyaluminum chloride to improve the filtration performance of the culture medium and maintain the stability of the membrane flux. When the dosage of polyaluminum chloride is controlled at 20 mg / L, the transmembrane pressure difference is reduced by more than 40%.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the method as described in any one of claims 7-8.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, it implements the method according to any one of claims 7-8.

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